Kereskedelmi, irodai és ipari

Description
W5100Is a multi-functional single chip network interface chip, the internal integration10/100Ethernet controller, mainly used in highly integrated, high stability, high performance and low cost of embedded systems. useW5100Can be achieved without the operating systemInternetconnection.W5100versusIEEE802.3 10BASE-Tand802.3u 100BASE-TXcompatible.W5100The internal integration of the whole hardware, and after years of market-provenTCP / IPProtocol stack, Ethernet media transport layer (MAC) And a physical layerPHY). useW5100Do not need to consider the Ethernet control, only need a simple port (Socket) Programming.
aeProduct.getSubject()
• A variety of interfaces are available: direct bus, indirect bus andSPIbus;
• Hardware supportTCP / IPProtocol stack, supportTCP, UDP, ICMP, IGMP, IPv4, & Lt;ARP, and PPPoE.
• As many as4Independent ports;
• Internal integration16KBYTESend and receive cache;
• A variety of information indicating the output, includingRX, TX, Full / Duplex, Colision, Link, Speed;
• Support for automatic polarity switching (DMI / MDIX);
•3.3Vpowered by,IOSignal compatible5VVoltage;
• Comes with Ethernet port, double row2 * 14 2.0 mmPin
compatibleThe official Ethernet library.

Product Specifications:
Model:XH-M548
Chip Type:TPA3116D2
Bluetooth module:btm835/csr8635(4.0)
Transmission distance:Max 10m
Voltage:DC12-24V
Current:>3A
Output Power:120Wx2
Efficiency ratio:>90%
Sound track:Dual track
Size:98*79*16mm
Bluetooth module Parameters:
Specification:Bluetooth V4.0
Modulation Mode:GFSK 3.14/4 DQPSK,8DPSK
Voltage:3.3-4.2V
Suppotr Bluetooth Protocol:HFP V1.6,HSP V1.2,A2DP V1.2,AVRCP V1.4,DI V1.3
Work Current:<=30mA
Standby Current:<50uA
Temperature range:-40C to 80C
Wireledd Transmission Distance:10m
Transmit Power:Support CLASS1/CLASS2/CLASS3 8dBm Max
Sensitivity:-80dBm<0.1% BER
Frequency Range:2.4GHz-2.480GHz
External Interface:PIO,SPI,Audio in/out and PCM,USB
Audio Support:AAC,MPA,SBC,Stereo
Distortion Factor:<=0.1%
Module Size:21.9*14.1*1.8mm

300PCS
LED light-emitting diodes 3MM total 200, 5MM LED diodes total 100.
40 X 3mm red LED diode
40 X 3mm white LED diode

40 X 3mm green LED diode

40 X 3mm blue LED diode

40 X 3mm yellow LED diode

20 X 5mm red LED diode

20 X 5mm white LED diode

20 X 5mm green LED diode

20 X 5mm blue LED diode

20 X 5mm yellow LED diode

Product Description
PWM DC Motor Speed Controller Switch DC 20A Current Voltage Regulator 10-60V PWM High Power Drive Module 60A 12 V 24 V 36 V 48 V
Product Discription:
Operating voltage: DC 10V-60V
Output Current: 0 to 20A.
Frequency:25KHz.
Continuous power: Max 1200W
Speed range: Motor zero speed to maximum motor speed
The maximum current up to 20A radiator or heat required to increase the fan
Material: Plastic, metal
Size (L*W*H):76mm*44mm*26mm
Package Included:
1 x 20A Universal DC10-60V PWM HHO RC Motor Speed Regulator Controller Switch

100% Brand New and High Quality
Mini thin volume;
High power class D digital amplifier board;
Using TPA3116D2 chip;
Working voltage 12V-24V DC;
Output power 50w 50w;
Size length 37 * 25mm width;
Package Included:
1 x TPA3116D2 Amplifier Board

100% Brand New and High Quality
Mini thin volume;
High power class D digital amplifier board;
Using TPA3116D2 chip;
Working voltage 12V-24V DC;
Output power 50w 50w;
Size length 37 * 25mm width;
Package Included:
1 x TPA3116D2 Amplifier Board

Dual Motor Driver 1A TB6612FNG Microcontroller
Description:
The TB6612FNG motor driver can control up to two DC motors at a constant current of 1.2A (3.2A peak). Two input signals (IN1 and IN2) can be used to control the motor in one of four function modes - CW, CCW, short-brake, and stop. The two motor outputs (A and B) can be separately controlled, the speed of each motor is controlled via a PWM input signal with a frequency up to 100kHz. The STBY pin should be pulled high to take the motor out of standby mode.
Logic supply voltage (VCC) can be in the range of 2.7-5.5VDC, while the motor supply (VM) is limited to a maximum voltage of 15VDC. The output current is rated up to 1.2A per channel (or up to 3.2A for a short, single pulse).
Board comes with all components installed as shown. Decoupling capacitors are included on both supply lines. All pins of the TB6612FNG are broken out to two 0.1" pitch headers; the pins are arranged such that input pins are on one side and output pins are on the other.
Features:
Power supply voltage: VM=15V max, VCC=2.7-5.5V
Output current: Iout=1.2A(average) / 3.2A (peak)
Standby control to save power
CW/CCW/short brake/stop motor control modes
Built-in thermal shutdown circuit and low voltage detecting circuit
All pins of the TB6612FNG broken out to 0.1" spaced pins
Filtering capacitors on both supply lines
Dimensions: 0.8x0.8"

Dual Motor Driver 1A TB6612FNG Microcontroller
Description:
The TB6612FNG motor driver can control up to two DC motors at a constant current of 1.2A (3.2A peak). Two input signals (IN1 and IN2) can be used to control the motor in one of four function modes - CW, CCW, short-brake, and stop. The two motor outputs (A and B) can be separately controlled, the speed of each motor is controlled via a PWM input signal with a frequency up to 100kHz. The STBY pin should be pulled high to take the motor out of standby mode.
Logic supply voltage (VCC) can be in the range of 2.7-5.5VDC, while the motor supply (VM) is limited to a maximum voltage of 15VDC. The output current is rated up to 1.2A per channel (or up to 3.2A for a short, single pulse).
Board comes with all components installed as shown. Decoupling capacitors are included on both supply lines. All pins of the TB6612FNG are broken out to two 0.1" pitch headers; the pins are arranged such that input pins are on one side and output pins are on the other.
Features:
Power supply voltage: VM=15V max, VCC=2.7-5.5V
Output current: Iout=1.2A(average) / 3.2A (peak)
Standby control to save power
CW/CCW/short brake/stop motor control modes
Built-in thermal shutdown circuit and low voltage detecting circuit
All pins of the TB6612FNG broken out to 0.1" spaced pins
Filtering capacitors on both supply lines
Dimensions: 0.8x0.8"

Features:
Specification:XH-M189
Chip Type: TPA3116D2
Audio Type:Class D
Input voltage:DC5-24V
Output Power: 2*50W
Working frequency:20Hz-20kHz
Dimension:84*51*29mm(Excluding potentiometer length)
Package including:
1pcs TPA3116D2 2*50W Dual Channel Stereo Digital Amplifier Board DC 5V

Product Description
The 16-channel network module is a network-based relay control module based on a 32-bit system. The module can use the Internet or an internal router to control the relay module, thereby completely remotely controlling the electrical switch and achieving the purpose of centralized power management. It can be set directly through IE browser and controls.

application:
Home decoration, hotels, shopping malls, factories, cafes, karaoke timer management, daily office, store monitoring, physical network, industrial control equipment, test equipment power control, unattended, underground pipelines, mining equipment, ships, air station rooms ,, Intelligent management and centralized management.

notes:
When connecting the high-voltage power supply module, please pay attention to the wiring to prevent equipment damage caused by short circuit!

Technical specifications:
External power supply voltage: 5.5V DC 2A max
2. Accessible: 16
3. Electronic switch life: 100,000 times
Working temperature: -30~85℃.
5. Size: 47 * 48 * 20mm

illustrate:
1. Set IP in Internet properties
2. The default IP 192.168.1.4 port: 30000
Open the browser and enter http://192.168.1.4/30000. Input control interface
3. Relay control HTTP commands:
Relay 1-8Bit command:
http: // IP / Port / 00: Relay-01 OFF
http: // IP / port / 01: relay-01 ON
http: // IP / port / 02: Relay-O2 OFF
http: // IP / Port / 03: Relay-02 ON
http: // IP / Port / 04: Relay-03 OFF
http: // IP / Port / 05: Relay-03 ON
http: // IP / Port / 06: Relay-04 OFF
http: // IP / Port / 07: Relay-04 ON
http: // IP / Port / 08: Relay-05 OFF
http: // IP / Port / 09: Relay-05 ON
http: // IP / port / 10: Relay-06 OFF
http: // IP / port / 11: Relay-06 ON
http: // IP / port / 12: Relay-07 OFF
http: // IP / port / 13: Relay-07 ON
http: // IP / port / 14: Relay-08 OFF
http: // IP / Port / 15: Relay-08 ON

Relay 9-16Bit command:
http: //IP/port/16: Relay 09 is off
http: //IP/port/17: Relay-09 ON
http: //IP/port/18: Relay -10 is off
http: //IP/port/19: Relay-10 ON
http: //IP/port/20: Relay 11 is off
http: //IP/Port/21: Relay-11 ON
http: //IP/port/22: Relay 12 is off
http: //IP/port/23: Relay-12 ON
http: //IP/port/24: Relay 13 is off
http: //IP/Port/25: Relay 13 ON
http: //IP/port/26: Relay 14 is off
http: //IP/port/27: Relay 14 ON
http: //IP/port/28: Relay-15 is off
http: //IP/port/29: Relay -15 ON
http: //IP/port/30: Relay 16 is off
http: //IP/Port/31: Relay 16 ON

View relay status command
http://IP/Port/99:16 ACSII feeds back the current I/O status. MSB is used for the first bit and LSB is used for the 16th bit.
E.g: Returning 1111000011110000 means that relays 1-4 are ON, relays 5-8 are OFF, relays 9-12 are ON, and relays 13-16 are OFF.

Modify IP
http: // IP / Port / 41: When modifying the IP, Relay-01 cannot be 0, Relay-01? 04 cannot be greater than 255. Port cannot be 0.

reset
When you short press the button, the LED will flash once.
Long press the button, don't let go, until the LED lights up. Then release the button and the LED will go out. It said it was a factory reset. IP 192.168.1.4 and port 30000

Component listing:
1 X Power Supply Module
1 X 830 tie-points Breadboard
1 X 65 Jumper Wire
140 X Solderless Jumper Wire
20 X Female-to-male Dupont Wire
2 X Pin header (40pin)
1 X Precision Potentiometer
2 X Photoresistor
1 X Thermistor
5 X Diode Rectifier (1N4007)
5 X NPN Transistor (PN2222)
1 X IC 4N35
1 X IC 74HC595
1 X Active Buzzer
1 X Passive Buzzer
10 X Button (small)
10 X 22pf Ceramic Capacitor
10 X 104 Ceramic Capacitor
5 X Electrolytic Capacitor (10UF 50V)
5 X Electrolytic Capacitor (100UF 50V)
10 X White LED
10 X Yellow LED
10 X Blue LED
10 X Green LED
10 X Red LED
1 X RGB LED
10 X Resistor (10R)
10 X Resistor (100R)
10 X Resistor (220R)
10 X Resistor (330R)
10 X Resistor (1K)
10 X Resistor (2K)
10 X Resistor (5K1)
10 X Resistor (10K)
10 X Resistor (100K)

Description
Input voltage range: 4.75-24V

Output voltage range: 0.93V-18V (step-down operation mode, enter at least greater than the output 2V above)

Output Current: 2.5A peak output 4A continuous output!

Switch: With soft-off function! After microamps shutdown current low level!

Size: 45mm * 32mm * 1.6mm

Num: YS-TB

Technical Description:

Synchronous rectification technology! Maximum efficiency of 98% !

Efficiency Found: 12V turn 5V:

12V turn 5V efficiency = (5V * 1.001A) / (12V * 0.431) = 96.7%

Product Description
[SYN115]
On-board single-chip ASK transmitter chip SYN115/F115
The module transmitting frequency: 433MHz
Module output power: <10dBm
The module trans rate: <10kbps
The module supply voltage :1.8-3.6V

[SYN480R]
On-board single-chip wireless SYN480R ASK/OOK receiver chip
The module receiving frequency: 433MHz
Module receiver sensitivity: -107dBm
The module transfer rate: 2.5kbps(SWP), 10kbps (FIXED)
The module supply voltage: 3.3-5.5V

Product Description
[SYN115]
On-board single-chip ASK transmitter chip SYN115/F115
The module transmitting frequency: 433MHz
Module output power: <10dBm
The module trans rate: <10kbps
The module supply voltage :1.8-3.6V

[SYN480R]
On-board single-chip wireless SYN480R ASK/OOK receiver chip
The module receiving frequency: 433MHz
Module receiver sensitivity: -107dBm
The module transfer rate: 2.5kbps(SWP), 10kbps (FIXED)
The module supply voltage: 3.3-5.5V

Product Description
[SYN115]
On-board single-chip ASK transmitter chip SYN115/F115
The module transmitting frequency: 433MHz
Module output power: <10dBm
The module trans rate: <10kbps
The module supply voltage :1.8-3.6V

[SYN480R]
On-board single-chip wireless SYN480R ASK/OOK receiver chip
The module receiving frequency: 433MHz
Module receiver sensitivity: -107dBm
The module transfer rate: 2.5kbps(SWP), 10kbps (FIXED)
The module supply voltage: 3.3-5.5V

Product Description
For precision temperature sensing, nothing beats a Platinum RTD. Resistance temperature detectors (RTDs) are temperature sensors that contain a resistor that changes resistance value as its temperature changes, basically a kind of thermistor. In this sensor, the resistor is actually a small strip of Platinum with a resistance of 100 ohms at 0°C, thus the name PT100. Compared to most NTC/PTC thermistors, the PT type of RTD is much most stable and precise (but also more expensive) PT100's have been used for many years to measure temperature in laboratory and industrial processes, and have developed a reputation for accuracy (better than thermocouples), repeatability, and stability.
However, to get that precision and accuracy out of your PT100 RTD you must use an amplifier that is designed to read the low resistance. Better yet, have an amplifier that can automatically adjust and compensate for the resistance of the connecting wires. If you're looking for a great RTD sensor, today is your lucky day because we have a lovely Ours RTD Sensor Amplifier with the MAX31865 breakout for use with any 2, 3 or 4 wire PT100 RTD!
We've carried various MAXIM thermocouple amplifiers and they're great - but thermocouples don't have the best accuracy or precision, for when the readings must be as good as can be. The MAX31865 handles all of your RTD needs, and can even compensate 3 or 4 wire RTDs for better accuracy. Connect to it with any microcontroller over SPI and read out the resistance ratio from the internal ADC. We put a 430Ω 0.1% resistor as a reference resistor on the breakout. We have some example code that will calculate the temperature based on the resistance for you.
We even made the breakout 5V compliant, with a 3.3V regulator and level shifting, so you can use it with any for For Ard uino or microcontroller.
Each order comes with one assembled RTD amplifier breakout board. Also comes with two 2-pin terminal blocks (for connecting to the RTD sensor) and pin header (to plug into any breadboard or perfboard). A required PT100 RTD is not included! (But we stock them in the shop). Some soldering is required to solder the headers and terminal blocks to the breakout, but it's an easy task with soldering tools.
Features and benefits
1. Support 100Ω to 1kΩ (0°C) platinum resistance RTD (PT100 to PT1000);(The Module resistor uses 430R)
2. Compatible with 2-wire, 3-wire and 4-wire sensor connections;
3. SPI compatible interface;
4.15-bit ADC resolution with a nominal temperature resolution of 0.03125 °C (variable with RTD nonlinearity);
5. The total accuracy is maintained at 0.5 ° C (0.05% of full scale) under the entire working conditions;
6 fully differential VREF input;
7. Conversion time: 21ms (maximum);
8. Integrated fault detection to increase system stability: (RTD open circuit, RTD short circuit to voltage outside the range or short circuit of RTD components).

Module features:
1. With optocoupler isolation, the control signal is isolated from the power supply of the controlled device, which greatly improves the interference.
2. Compatible with MCU and Arduino light control board, 3V or 5V signal
3. Start at high level, stop at low level, PWM speed regulation
4. It is widely used to control the start and stop of motors, solenoid valves and other branch equipment
5. There are various specifications of MOS tubes to provide options,
E.g
FR120N: 100V 9.4A
LR7843: 30V 161A
AOD4184: 40V 50A
6. The signal input side can weld the terminal or pin by itself, compatible with breadboard
7. The output can be welded to the terminal or directly to the wire
8. Module size 23mm X 16mm has two 2mm diameter screw holes, the hole spacing is 8mm

Module features:
1. With optocoupler isolation, the control signal is isolated from the power supply of the controlled device, which greatly improves the interference.
2. Compatible with MCU and Arduino light control board, 3V or 5V signal
3. Start at high level, stop at low level, PWM speed regulation
4. It is widely used to control the start and stop of motors, solenoid valves and other branch equipment
5. There are various specifications of MOS tubes to provide options,
E.g
FR120N: 100V 9.4A
LR7843: 30V 161A
AOD4184: 40V 50A
6. The signal input side can weld the terminal or pin by itself, compatible with breadboard
7. The output can be welded to the terminal or directly to the wire
8. Module size 23mm X 16mm has two 2mm diameter screw holes, the hole spacing is 8mm

Module features:
1. With optocoupler isolation, the control signal is isolated from the power supply of the controlled device, which greatly improves the interference.
2. Compatible with MCU and Arduino light control board, 3V or 5V signal
3. Start at high level, stop at low level, PWM speed regulation
4. It is widely used to control the start and stop of motors, solenoid valves and other branch equipment
5. There are various specifications of MOS tubes to provide options,
E.g
FR120N: 100V 9.4A
LR7843: 30V 161A
AOD4184: 40V 50A
6. The signal input side can weld the terminal or pin by itself, compatible with breadboard
7. The output can be welded to the terminal or directly to the wire
8. Module size 23mm X 16mm has two 2mm diameter screw holes, the hole spacing is 8mm

Product Description
100% brand new and high quality
Material: Electrical Components
Color: See pictures
Features:
You want to make a robot, When we saw this chip, we quickly realized what an excellent add-on this would be.
Using only two pins, control 16 free-running PWM outputs!
I2C input, control 16 PWM output, you can control the 16 way servo motor.
Specifications:
Frequency: 40-1000Hz.
Channel number: 16 channel.
Resolution: 12 bit.
Voltage: DC 5-10V
Size: 60*25mm/2.36"*0.98"
No retail package
Quantity:1Pc
Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!!

2 Channel Solid State Relay
1, the use of solid state relays, output with a resistive fuse 240V 2A.
2, Size: 55 * 33 * 25 (L * W * H)
3, input power: 5V DC (160MA)
4, the input control signal voltage:
0-1.5V state low level relay
5, blue KF301 terminal access control line more convenient

Product features
P1DB dB 30 dBm typical @ 3 V
IP3 43 dBm typical @ 3 Vs low insertion loss (0.3 dB at 0.9 GHz)
Low DC power consumption
1. Power supply voltage: directly control the level through the control port
2. Frequency range (300KHZ-3GHZ)
3. Provide PDF schematic diagram

Description:
You want to make a cool robot, maybe a hexapod walker, or maybe just a piece of art with a lot of moving parts. Or maybe you want to drive a lot of LEDs with precise PWM output. Then you realize that your microcontroller has a limited number of PWM outputs! What now?
Using only two pins, control 16 free-running PWM outputs! You can even chain up 62 breakouts to control up to 992 PWM outputs
>It's an I2C-controlled PWM driver with a built in clock. That means that, unlike the TLC5940 family, you do not need to continuously send it signal tying up your microcontroller, its completely free running!
>It is 5V compliant, which means you can control it from a 3.3V microcontroller and still safely drive up to 6V outputs (this is good for when you want to control white or blue LEDs with 3.4 forward voltages)
>6 address select pins so you can wire up to 62 of these on a single i2c bus, a total of 992 outputs - that's a lot of servos or LEDs
>Adjustable frequency PWM up to about 1.6 KHz
>12-bit resolution for each output - for servos, that means about 4us resolution at 60Hz update rate
>Configurable push-pull or open-drain output
>Output enable pin to quickly disable all the outputs
We wrapped up this lovely chip into a breakout board with a couple nice extras
>Terminal block for power input (or you can use the 0.1" breakouts on the side)
>Reverse polarity protection on the terminal block input
>Green power-good LED
>3 pin connectors in groups of 4 so you can plug in 16 servos at once (Servo plugs are slightly wider than 0.1" so you can only stack 4 next to each other on 0.1" header
>"Chain-able" design
>A spot to place a big capacitor on the V line (in case you need it)
>330 ohm series resistors on all the output lines to protect them, and to make driving LEDs trivial
>Solder jumpers for the 6 address select pins

Features:
Specification:
Material: abs
Model: FT232 B female
Applicable: for Windows system
Type: Module
Size: approx. 3.9*2.9*1.3 cm / 1.5*1.1*0.5 inch

ENC28J60 LAN
Brand new and high quality.
chip board ENC28J60-I/SO.
the board 25MHZ crystal.
the network interface board HR911105A.
3.3 V power supply pin.
Size:5.9cm x 3.5cm - 2.32inch x 1.38inch.
Debug reminder:
1, the IP address of the computer to a network segment and module such as IP module 192.168.1.2, IP computer set: 192.168.1.3; 192.168.1 is the 3 section;
2, cross the network cable connected to the mouth of the computer network module and mouth; (that is, the cable network 1 3,2 cross, and then do not understand that there are pictures Baidu);
3, the module and the MCU connection should pay attention to the connection of each line is reliable (the surface is not even connected to the good);
4, and the MCU port IO to confirm that is right;
5, the program recompile, download, confirm whether to download! STM32 and 51 IO
Wiring instructions:
############STM32 connection ##########
STM32f103VBT6 ENC28J60 module or other stm32
PC10----------- RESET
PC12--------- CS //PC12 pull-up output mode
//SPI1-
PA5----------- SCK / / output mode
PA6----------- SO / / input mode
PA7----------- SI / / output mode
######51 microcontroller ########### //---------------------------------
Change IP address and MAC address in uipopt.h
192.168.1.100
//--------------------------------- port configuration in spi.h.
STC12C5A60S2 DIP OSC:18.432Msbit CSN = P1^0; / / 28J60-- CS (SS)
Sbit SIN = P1^1; / / MOSI
Sbit SON = P1^2; / / MISO
Sbit SCKN = P1^3; / / SCK
Sbit RSTN = P1^4; / / RST
Sbit INTN = P3^3; / / INT
ENC28J60 Mini
1. Chip board ENC28J60/SS.
2. The board 25MHZ crystal.
3. The network interface board HR911105A.
4. 3.3V power supply pin.
5. Size: 48.8 (mm) x 18.5 (mm).

ENC28J60 LAN
Brand new and high quality.
chip board ENC28J60-I/SO.
the board 25MHZ crystal.
the network interface board HR911105A.
3.3 V power supply pin.
Size:5.9cm x 3.5cm - 2.32inch x 1.38inch.
Debug reminder:
1, the IP address of the computer to a network segment and module such as IP module 192.168.1.2, IP computer set: 192.168.1.3; 192.168.1 is the 3 section;
2, cross the network cable connected to the mouth of the computer network module and mouth; (that is, the cable network 1 3,2 cross, and then do not understand that there are pictures Baidu);
3, the module and the MCU connection should pay attention to the connection of each line is reliable (the surface is not even connected to the good);
4, and the MCU port IO to confirm that is right;
5, the program recompile, download, confirm whether to download! STM32 and 51 IO
Wiring instructions:
############STM32 connection ##########
STM32f103VBT6 ENC28J60 module or other stm32
PC10----------- RESET
PC12--------- CS //PC12 pull-up output mode
//SPI1-
PA5----------- SCK / / output mode
PA6----------- SO / / input mode
PA7----------- SI / / output mode
######51 microcontroller ########### //---------------------------------
Change IP address and MAC address in uipopt.h
192.168.1.100
//--------------------------------- port configuration in spi.h.
STC12C5A60S2 DIP OSC:18.432Msbit CSN = P1^0; / / 28J60-- CS (SS)
Sbit SIN = P1^1; / / MOSI
Sbit SON = P1^2; / / MISO
Sbit SCKN = P1^3; / / SCK
Sbit RSTN = P1^4; / / RST
Sbit INTN = P3^3; / / INT
ENC28J60 Mini
1. Chip board ENC28J60/SS.
2. The board 25MHZ crystal.
3. The network interface board HR911105A.
4. 3.3V power supply pin.
5. Size: 48.8 (mm) x 18.5 (mm).

Description:
The SSM2167 is a low-voltage, low-noise mono microphone preamplifier, ideal for low-power audio signal chains. This preamplifier includes a built-in compression and noise gate. For this function, it is better than using an op amp in the preamplifier circuit. The dynamic range of the compressed microphone signal reduces the peak signal level and adds additional gain to the low level signal. The noise gate attenuates the signal level below a certain threshold,in order to amplify only the desired signal, such as speech, and reduce the noise in the output signal. These features will help improve the clarity of the voice signal received by the microphone.
Working Voltage:DC 3V-5V
Size:2.2x1.5cm/0.87x0.59inch
Package included:
1x SSM2167 Microphone Preamplifier Board

Product Description
Everyone knows that the frequency divider is installed in the speaker to achieve crossover and change the effect. The ancient crossover is rigid. If it is not suitable for the user, it will not be changed. Sometimes the treble is too strong and the bass surface is poor, or the bass is too strong and the overall performance is not clear. It is difficult for beginners to solve it; It is not necessarily appropriate if the frequency is changed, and the cost is high. The frequency divider is a multi-purpose, fully adjustable, free of welding, very convenient to use, and the listener can realize automatic debugging according to their own preferences. It can be used in a wide range. It can be used with a two-way speaker with a tweeter bass, a small satellite box with a 2.1 mid-range and a high pitch, and a full-range speaker for a car. You can also use the tweeter or the bass alone. Speaker impedance of 4-16 ohms can be used, as long as the power of the speaker is below 400W, there is no problem.
Product parameters:
Model: YLY-2088.
Dimensions: length 7 cm, width 5 cm, thickness 2.5 cm.
Frequency point: No positioning, determined by debugging.
Power: 400W.
Impedance: 4-16 ohms.
Materials: The inductor is wound by oxygen-free copper, and the wire diameter of pure copper wire is 08, which has been verified by our shop. Large capacity capacitor, reasonable design, exquisite appearance, full self-control of sound quality.

Description:
The probe can be inserted directly into the soil. It is a digital display of soil moisture. When the humidity is below the set value starting pump starts watering, when humidity reaches the set value to stop watering. The operation is very simple. It is intelligent humanization.
Parameters:
Product name: Soil Moisture Controller Module
Model: XH - M214
Power supply voltage: DC 12 V
Output way: Output switch
Humidity range: 20-99% RH
Control precision: 1% RH
Control current: 10 A
Size: 52 * 43 * 16 mm
Using attention:
Please follow the wiring diagram of the description. You can choose the appropriate wiring mode according to the load voltage you use
1>. F0 setting start humidity(the humidity of the solenoid valve or the pump start working)Press the “SET” button to display “F0” and press the “SET” button to display the start humidity, and press / button to “SET” the humidity value
2>. F1 setting stop humidity (the humidity of the solenoid valve or the pump stops working)Press /- button to switch to “F1”, press the “SET” button to display the stop humidity value, and press / button to SET the humidity value
3>. F2 humidity correction
Normal use without correction error.The correction of values in the use of multiple modules at the same time is conducive to a unified management operation.

CH375B
1. CH375B is a USB bus communication
With the interface chip, it has an 8-bit data bus, read, write, chip select control lines and interrupt output, which can be easily connected to the system bus of the microcontroller/DSP/MCU/MPU and other controllers. In the USB host mode, CH375B also provides a serial communication mode, which is connected to the single-chip microcomputer/DSP/MCU/MPU through serial input, serial output and interrupt output.
2. 2x8 connector for easy connection with MCU
3. According to the jumper selection, it can work in parallel mode or serial mode
4. USB status indicator
5. Onboard 3.3V LDO 1117, maximum 800mA current
6. The 5V power supply is powered by the target board
7, 12MHZ crystal oscillator
CH376S
1. The CH376 chip internal curing FAT file system, file operation is simple, fast,
2. Support U disk, USB hard disk, USB flash drive and USB card reader, USB storage device
3. Standard Capacity SD card support, high capacity HC-SD card as well as protocol-compatible MMC, TF card
4. Support a variety of communication interfaces: 8-bit parallel, SPI interface and asynchronous serial
5. Compatibility: Equipment manner compatible with CH372 compatible host with CH375
6. Module size: 50mm × 34mm

CH375B
1. CH375B is a USB bus communication
With the interface chip, it has an 8-bit data bus, read, write, chip select control lines and interrupt output, which can be easily connected to the system bus of the microcontroller/DSP/MCU/MPU and other controllers. In the USB host mode, CH375B also provides a serial communication mode, which is connected to the single-chip microcomputer/DSP/MCU/MPU through serial input, serial output and interrupt output.
2. 2x8 connector for easy connection with MCU
3. According to the jumper selection, it can work in parallel mode or serial mode
4. USB status indicator
5. Onboard 3.3V LDO 1117, maximum 800mA current
6. The 5V power supply is powered by the target board
7, 12MHZ crystal oscillator
CH376S
1. The CH376 chip internal curing FAT file system, file operation is simple, fast,
2. Support U disk, USB hard disk, USB flash drive and USB card reader, USB storage device
3. Standard Capacity SD card support, high capacity HC-SD card as well as protocol-compatible MMC, TF card
4. Support a variety of communication interfaces: 8-bit parallel, SPI interface and asynchronous serial
5. Compatibility: Equipment manner compatible with CH372 compatible host with CH375
6. Module size: 50mm × 34mm

Description
Module name: 500W boost constant current module

Module nature: Non-isolated boost module (BOOST)

Input voltage: DC8.5V-48V

Input current: 15A (MAX) over 8A, please strengthen heat dissipation, otherwise it may be damaged
Quiet working current: 10mA (when 12V rises to 20V, the higher the output voltage, the higher the quiescent current will increase)

Output voltage: 10-50V continuously adjustable

Output current: 10A MAX (related to the input and output pressure difference, the greater the pressure difference, the smaller the output current, if the output current exceeds 5A, add a heat sink or fan for heat dissipation)

Constant current range: 0.2-10A

Output power: = input voltage*10A,
such as: input 12V*15A=180W, input 24V*15A=360W,
Input 36V*10A=360W, input 48V*10A=480W,,,
If you need more power, you can use two modules in parallel. For example, if the output is 10A, you can use two modules in parallel and adjust the current of each module to 5A.

Working temperature: -40~ 85 degrees (please strengthen heat dissipation when the ambient temperature is too high)

Working frequency: 150KHz

Conversion efficiency: up to 96% (efficiency is related to input, output voltage, current, and pressure difference)

Overcurrent protection: Yes (output over 10A, automatic protection, there is a certain range of error. The protection mode is to stop the boost, the output still has voltage)

Input reverse connection protection: Yes, (less than 5A, if you need more reverse connection current, please connect a diode in series with the input)

Product application:
DIY a regulated power supply, input 12V, output can be adjusted from 12-50V.

To supply power to your electronic equipment, you can set the output value according to your system voltage.

As a car power supply, it can power your laptop, PDA or various digital products.

DIY a high-power laptop mobile power supply: equipped with a large-capacity 12V lithium battery pack, so that your books can be bright wherever you go.

The solar panel is stabilized.

Charge storage batteries, lithium batteries, etc.

Precautions
Do not adjust the current in a short-circuit method. The circuit structure of the boost module cannot be adjusted in a short-circuit method. Please make sure that the output voltage is greater than the input voltage; when large current output, please ensure good heat dissipation; when the load is large, the module must first be connected to the input Voltage, then connect the load.

Parameter :
Shot : 1/4 5M
Aperture : 2.9
Focal length : 3.29
FOV : 65 degree
Sensor type : OmniVision OV5647 Color CMOS QSXGA (5-megapixel)
Sensor size : 3.67 x 2.74 mm (1/4" format)
Pixel Count : 2592 x 1944
Pixel Size : 1.4 x 1.4 um
Lens : f=3.6 mm, f/2.9
Angle of View : 54 x 41 degrees
Field of View : 2.0 x 1.33 m at 2 m
Full-frame SLR lens equivalent: 35 mm
Fixed Focus : 1 m to infinity
Video : 1080p at 30 fps with codec H.264 (AVC)
Up to 90 fps Video at VGA
Board size : 25 x 24 mm (not including flex cable)
Support Raspberry Pi 3 Model B

3 CH LCD display
Specification:
Working voltage: 3.3 ~ 30V
Frequency range: 1Hz ~ 150KHz
Frequency accuracy: the accuracy in each range is about 2%
Signal load capacity: the output current can be about 5 ~ 30ma
Output amplitude: PWM amplitude equal to the supply voltage
Ambient temperature: -20 ~ 70 degree
Features:
LCD display frequency and duty cycle, very clear, PWM output can be set to the frequency and duty cycle.
Wide frequency range, high precision.
Serial communication, TTL level.
Used as a square wave signal generator, generate square wave signal for experimental development and use.
Used to generate a square wave signal that controls the motor driver.
Generate adjustable pulse for MCU use.
Generate adjustable pulse, control the relevant circuit (PWM dimming speed and other applications).
Serial control (single-chip TTL level communication).
Fine workmanship and good performance.
Stable and reliable.
Easy to use.
Long service life.
Frequency is divided into four ranges, automatic switching:
1. XXX (no decimal point): the smallest unit is 1Hz, the value range of 1Hz ~ 999Hz;
2. X.XX (decimal point in the hundred) the smallest unit is 0.01Khz, the range of 1.00Khz ~ 9.99Khz;
3. XX.X (decimal point in ten): the smallest unit is 0.1Khz; value range of 10.0KHz ~ 99.9KHz
4. X.X.X (decimal point in ten and hundred): the smallest unit is 1Khz; value range 1KHz ~ 150KHz
5. e.g. frequency display:
100 indicates PWM output 100Hz pulse;
1.01 indicates PWM output 1.01K pulse;
54.1 indicates that the PWM output has a pulse of 54.1 kHz;
1.2.4 indicates that the PWM output is 124 kHz pulse;
6. Duty cycle range: 0 ~ 100%
Parameter Settings:
The module has four independent keys, used to set the frequency and duty cycle.
Support touch (increase or decrease a unit) and long press (fast increase or decrease).
The parameters automatically save, power down Not lost.
Communication Standard:
9600 bps Data bits: 8
Stop bit: 1
Check digit: none
Flow control: none
1>. set the frequency of the PWM
"F101": Set the frequency to 101 HZ (001 to 999)
"F1.05": set the frequency of 1.05 KHZ (1.00 ~ 9.99)
"F10.5": Set the frequency to 10.5KHZ (10.0 ~ 99.9)
"F1.0.5": set the frequency of 105KHZ (1.0.0 ~ 1.5.0)
2>. set the PWM duty cycle
"DXXX": set the PWM duty cycle to XXX; (001 ~ 100)
Such as D050, set the PWM duty cycle is 50%
3>. read the set parameters
Send a "read" string to read the set parameters.
Set successfully return: DOWN.
Setup failed to return: FALL.

3 CH LCD display
Specification:
Working voltage: 3.3 ~ 30V
Frequency range: 1Hz ~ 150KHz
Frequency accuracy: the accuracy in each range is about 2%
Signal load capacity: the output current can be about 5 ~ 30ma
Output amplitude: PWM amplitude equal to the supply voltage
Ambient temperature: -20 ~ 70 degree
Features:
LCD display frequency and duty cycle, very clear, PWM output can be set to the frequency and duty cycle.
Wide frequency range, high precision.
Serial communication, TTL level.
Used as a square wave signal generator, generate square wave signal for experimental development and use.
Used to generate a square wave signal that controls the motor driver.
Generate adjustable pulse for MCU use.
Generate adjustable pulse, control the relevant circuit (PWM dimming speed and other applications).
Serial control (single-chip TTL level communication).
Fine workmanship and good performance.
Stable and reliable.
Easy to use.
Long service life.
Frequency is divided into four ranges, automatic switching:
1. XXX (no decimal point): the smallest unit is 1Hz, the value range of 1Hz ~ 999Hz;
2. X.XX (decimal point in the hundred) the smallest unit is 0.01Khz, the range of 1.00Khz ~ 9.99Khz;
3. XX.X (decimal point in ten): the smallest unit is 0.1Khz; value range of 10.0KHz ~ 99.9KHz
4. X.X.X (decimal point in ten and hundred): the smallest unit is 1Khz; value range 1KHz ~ 150KHz
5. e.g. frequency display:
100 indicates PWM output 100Hz pulse;
1.01 indicates PWM output 1.01K pulse;
54.1 indicates that the PWM output has a pulse of 54.1 kHz;
1.2.4 indicates that the PWM output is 124 kHz pulse;
6. Duty cycle range: 0 ~ 100%
Parameter Settings:
The module has four independent keys, used to set the frequency and duty cycle.
Support touch (increase or decrease a unit) and long press (fast increase or decrease).
The parameters automatically save, power down Not lost.
Communication Standard:
9600 bps Data bits: 8
Stop bit: 1
Check digit: none
Flow control: none
1>. set the frequency of the PWM
"F101": Set the frequency to 101 HZ (001 to 999)
"F1.05": set the frequency of 1.05 KHZ (1.00 ~ 9.99)
"F10.5": Set the frequency to 10.5KHZ (10.0 ~ 99.9)
"F1.0.5": set the frequency of 105KHZ (1.0.0 ~ 1.5.0)
2>. set the PWM duty cycle
"DXXX": set the PWM duty cycle to XXX; (001 ~ 100)
Such as D050, set the PWM duty cycle is 50%
3>. read the set parameters
Send a "read" string to read the set parameters.
Set successfully return: DOWN.
Setup failed to return: FALL.

Introduction
Voltage Supply: 9-12V DC Input
Waveforms: Square, Sine & Triangle
Impedance: 600 Ohm 10%
Frequency: 1Hz - 1MHz
SINE WAVE
Amplitude: 0 - 3V at 9V DC input
Distortion: Less than 1% (at 1kHz)
Flatness: 0.05dB 1Hz - 100kHz
SQUARE WAVE
Amplitude: 8V (no load) at 9V DC input
Rise Time: Less than 50ns (at 1kHz)
Fall Time: Less than 30ns (at 1kHz)
Symmetry: Less than 5% (at 1kHz)
TRIANGLE WAVE
Amplitude: 0 - 3V at 9V DC input
Linearity: Less than 1% (up to 100kHz) 10mA
Feature
The welding installation considerations, follow these steps:
1. The components are welding the front board, from low to high principles, namely the first low welding components, such as, capacitor, resistor, diode, etc.
2.Welding IC socket, terminal blocks, finally power socket, adjustable potentiometer.
3.The back with a diagonal cutting pliers to cut short the pins as far as possible
Debugging steps:
1After completion of welding on IC, XR2206, pay attention to the direction of IC, insert the might damage the chip!
2. check the IC whether against, such as anti please timely correction.
3. Insert the power supply, power supply for 5.5 * 2.1 port, inside outside is negative polarity. For 9-12 v power supply voltage. The waveform may not be stable for more than 12 v
Using the step
1. J1 jumper cap plug in, SIN/TRI blue terminals output sine wave (note J1, J2 can only insert one of)
2. J2 jumper cap plug in, SIN/TRI blue terminals output triangular wave (note J1, J2 can only insert one of)
3. SQU blue terminals output pulse
4. AMP : Sine wave, triangle wave amplitude adjustment
5. FINE : Frequency fine adjustment
6. Coarse : Frequency of coarse adjustment
Schematic diagram of Function Generatorc

Product Description
Note: does not include batteries
1. DS3231 high precision clock module for Raspberry Pi
2. the module can also be used for Arduino motherboard
3. The module itself can be adapted to 3.3 V and 5 V system, no level conversion, it is super convenient!
Features:
1. to 40° to 85° temperature range, timing accuracy in a plus or minus 5 PPM ( /- 0.432 SEC/day)
2. To provide continuous timing battery backup
3. Low power consumption
4. The device compatible with DS3231 encapsulation and function
5. Complete the clock calendar function including the second, minute
6. Two calendar clock
7. 1 Hz and 32.768 kHz output
8. Reset the output and input button to tremble
9. High speed (400 KHZ) the I2C serial bus
10. 2.3 V to 5.5 V power supply voltage
11.The accuracy of plus or minus 3° digital temperature sensor 12.- 40 ° to 85° temperature range

Product Description
1.Switch 10Mbps network automatically
2.Half/Full duplex 10Mbps operation
3.Support full duplex flow control(IEEE 802.3X)
4.Support all USB standard commands
5.Support suspend/resume detection logic
6.Compliant to USB interface verison 1.0/1.1/2.0/3.0
7.Support 10Mbps N-way auto-negotiation operation
8.Integrated fast ethernet MAC, physical clip and transceiver in one chip
NOTE: This Network adapter IC is RD9700, it supports maximum Ethernet speed is 10Mbps,if you network speed is more than 10Mbps .

Product Features
· Input voltage range: 6V-32V
· Output voltage: default 5V, automatically adjust between 3-12V after triggering fast charge
· Output power: up to 24W (5V/3.4A, 9V/2.5A, 12V/2A, etc.)
· Output voltage cable compensation function
· Conversion efficiency: 90% -97%
· Support multiple fast charging protocols
· Input overvoltage and undervoltage protection
· Input overcurrent protection
· Output overcurrent, short circuit protection
· Machine over temperature protection
Support fast charge agreement
· Support DCP protocol, BC1.2, Apple, Samsung protocol
· Support Huawei Fast Charge Protocol FCP/SCP
· Support Huawei Fast Charge Protocol AFC
· Support Spreadtrum Fast Charge Protocol SFCP
· Support Qualcomm QC2.0 and 3.0
· Support MTK PE1.1/PE2.0
Applications
· Solar panel to mobile phone charging
· Car charging retrofit
· Driving recorder power supply
· Home power supply, smart plug modification
· Fast charge adapter
Dual-port independent output, support protocol: QC2.0, QC3.0, MTK PE1.1/2.0, FOR Apple, FOR Samsung AFC,FOR Huawei FCP, FOR Spreadtrum SFCP
Input voltage: DC 6~30V
Output voltage: default 5V, adjust range 3~12V according to fast charging protocol
Output capacity: single-port rated current 2.4A, rated power 24W
Protection measures: Output overvoltage protection, limit the output voltage does not exceed 13V (in the case of chip failure); input with a fuse.

Product Features
· Input voltage range: 6V-32V
· Output voltage: default 5V, automatically adjust between 3-12V after triggering fast charge
· Output power: up to 24W (5V/3.4A, 9V/2.5A, 12V/2A, etc.)
· Output voltage cable compensation function
· Conversion efficiency: 90% -97%
· Support multiple fast charging protocols
· Input overvoltage and undervoltage protection
· Input overcurrent protection
· Output overcurrent, short circuit protection
· Machine over temperature protection
Support fast charge agreement
· Support DCP protocol, BC1.2, Apple, Samsung protocol
· Support Huawei Fast Charge Protocol FCP/SCP
· Support Huawei Fast Charge Protocol AFC
· Support Spreadtrum Fast Charge Protocol SFCP
· Support Qualcomm QC2.0 and 3.0
· Support MTK PE1.1/PE2.0
Applications
· Solar panel to mobile phone charging
· Car charging retrofit
· Driving recorder power supply
· Home power supply, smart plug modification
· Fast charge adapter
Dual-port independent output, support protocol: QC2.0, QC3.0, MTK PE1.1/2.0, FOR Apple, FOR Samsung AFC,FOR Huawei FCP, FOR Spreadtrum SFCP
Input voltage: DC 6~30V
Output voltage: default 5V, adjust range 3~12V according to fast charging protocol
Output capacity: single-port rated current 2.4A, rated power 24W
Protection measures: Output overvoltage protection, limit the output voltage does not exceed 13V (in the case of chip failure); input with a fuse.

Product Features
· Input voltage range: 6V-32V
· Output voltage: default 5V, automatically adjust between 3-12V after triggering fast charge
· Output power: up to 24W (5V/3.4A, 9V/2.5A, 12V/2A, etc.)
· Output voltage cable compensation function
· Conversion efficiency: 90% -97%
· Support multiple fast charging protocols
· Input overvoltage and undervoltage protection
· Input overcurrent protection
· Output overcurrent, short circuit protection
· Machine over temperature protection
Support fast charge agreement
· Support DCP protocol, BC1.2, Apple, Samsung protocol
· Support Huawei Fast Charge Protocol FCP/SCP
· Support Huawei Fast Charge Protocol AFC
· Support Spreadtrum Fast Charge Protocol SFCP
· Support Qualcomm QC2.0 and 3.0
· Support MTK PE1.1/PE2.0
Applications
· Solar panel to mobile phone charging
· Car charging retrofit
· Driving recorder power supply
· Home power supply, smart plug modification
· Fast charge adapter
Dual-port independent output, support protocol: QC2.0, QC3.0, MTK PE1.1/2.0, FOR Apple, FOR Samsung AFC,FOR Huawei FCP, FOR Spreadtrum SFCP
Input voltage: DC 6~30V
Output voltage: default 5V, adjust range 3~12V according to fast charging protocol
Output capacity: single-port rated current 2.4A, rated power 24W
Protection measures: Output overvoltage protection, limit the output voltage does not exceed 13V (in the case of chip failure); input with a fuse.

MAX98357 I2S Audio Amplifier Module Unfiltered Class D Amplifier Support ESP32 Raspberry Pi
Single-Supply Operation (2.5V to 5.5V)
3.2W Output Power into 4I at 5V
2.4mA Quiescent Current
92% Efficiency (R L = 8I, P OUT = 1W)
25µV RMS Output Noise (A V = 15dB)
Low 0.015% THD N at 1kHz
No MCLK Required
Sample Rates of 8kHz to 96kHz
Supports Left, Right, or (Left/2 Right/2) Output
Sophisticated Edge Rate Control Enables
Filterless Class D Outputs
77dB PSRR at 1kHz
Low RF Susceptibility Rejects TDMA
Noise from GSM Radios
Extensive Click-andPop Reduction Circuitry
Robust Short-Circuit and Thermal Protection
Available in Space-Saving Packages:
1.345mm x 1.435mm WLP (0.4mm Pitch)
and 3mm x 3mm TQFN

Operation instructions
After switching on the power supply, the blue indicator flashes and enters the Bluetooth mode; after broadcasting the "prompt sound", it enters the matching mode and waits for matching; after broadcasting the "prompt sound", the mobile Bluetooth searches for "XY-WRBT" (the name of the power amplifier board device), clicks on the "XY-WRBT" connection, and plays the "prompt sound" after the connection is successful, and when the indicator light is long, the mobile music can be played. When playing music, the indicator light flickers slowly; after Bluetooth disconnects, the amplifier board prepares for the next pairing, and plays the "prompt tone" and enters the pairing mode to wait for the pairing.
Cautions for Power Supply with 3.7V Lithium Battery
1. When powered by batteries, the battery voltage is less than 3.3V decoder board automatically shuts down, and the contacts are switched on/off for 2 seconds after re-energizing or full charging.
2. When using batteries to supply power, if the voltage of batteries is too low, there may be "nourishing" noise. In this case, the batteries need to be charged.
3. Because there is no charge protection circuit for lithium batteries on decoder board, it is recommended to use lithium batteries with protection board.
4. If your rechargeable battery supports Micro USB charging directly, you can use Micro USB charging directly to the battery.

Operation instructions
After switching on the power supply, the blue indicator flashes and enters the Bluetooth mode; after broadcasting the "prompt sound", it enters the matching mode and waits for matching; after broadcasting the "prompt sound", the mobile Bluetooth searches for "XY-WRBT" (the name of the power amplifier board device), clicks on the "XY-WRBT" connection, and plays the "prompt sound" after the connection is successful, and when the indicator light is long, the mobile music can be played. When playing music, the indicator light flickers slowly; after Bluetooth disconnects, the amplifier board prepares for the next pairing, and plays the "prompt tone" and enters the pairing mode to wait for the pairing.
Cautions for Power Supply with 3.7V Lithium Battery
1. When powered by batteries, the battery voltage is less than 3.3V decoder board automatically shuts down, and the contacts are switched on/off for 2 seconds after re-energizing or full charging.
2. When using batteries to supply power, if the voltage of batteries is too low, there may be "nourishing" noise. In this case, the batteries need to be charged.
3. Because there is no charge protection circuit for lithium batteries on decoder board, it is recommended to use lithium batteries with protection board.
4. If your rechargeable battery supports Micro USB charging directly, you can use Micro USB charging directly to the battery.

Description
1. Supply Voltage: 2.7v-5.5v @ 3mA current
2. Output: 2Vpp on 1.25V bias
3. Frequency Response: 20Hz - 20 KHz
4. Programmable Attack and Release Ratio
5. Automatic gain, selectable max from 40dB, 50dB or 60dB
6. Low Input-Referred Noise Density of 30nV/
7. Low THD: 0.04% (typ)

Description
This is a breakout board for Freescale's MPR121QR2. The MPR121 is a capacitive touch sensor controller driven by an I2C interface. The chip can control up to twelve individual electrodes, as well as a simulated thirteenth electrode. The MPR121 also features eight LED driving pins. When these pins are not configured as electrodes, they may be used to drive LEDs.
There a four jumpers on the bottom of the board, all of which are set (closed) by default. An address jumper ties the ADD pin to ground, meaning the default I2C address of the chip will be 0x5A. If you need to change the address of the chip (by shorting ADD to a different pin), make sure you open the jumper first. Jumpers also connect SDA, SCL and the interrupt pin to 10k pull-up resistors. If you don't require the pull-up resistors you can open the jumpers by cutting the trace connecting them.
There is no regulation on the board, so the voltage supplied should be between 2.5 and 3.6VDC. The VREG pin is connected through a 0.1uF capacitor to ground, which means, unless you modify the board, you can't operate the MPR121 in low-supply voltage mode (1.71-2.75VDC).
Size:3cm x 2cm .

Product Description
not includingProduct Description battery
is a extremely accurate I2C real-time clock (RTC), with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, disconnect the main power supply and maintains accurate timekeeping. Integrated oscillator improve long-term accuracy of the device and reduces the number of components of the production line. The DS3231 is available in commercial and industrial temperature ranges, using a 16-pin 300mil SO package.
RTC maintains seconds, minutes, hours, day, date, month, and year information. Less than 31 days of the month, the end date will be automatically adjusted, including corrections for leap year. The clock operates in either the 24 hours or band / AM / PM indication of the 12-hour format. Provides two configurable alarm clock and a calendar can be set to a square wave output. Address and data are transferred serially through an I2C bidirectional bus.
A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, provide a reset output, and if necessary, automatically switch to the backup power supply. In addition, / RST pin is monitored as generating μP reset manually.
Save time and high precision addition, DS3231 also has some other features that extend the system host of additional features and a range of options. The device integrates a very precise digital temperature sensor, through the I2C * interface to access it (as the same time). This temperature sensor accuracy is ± 3 ° C. On-chip power supply control circuit can automatically detect and manage the main and standby power (i.e., low-voltage battery) to switch between the power supply. If the main power failure, the device can continue to provide accurate timing and temperature, performance is not affected. When the main power re-power or voltage value returns to within the allowable range, the on-chip reset function can be used to restart the system microprocessor.
Module parameters:
1 Size: 38mm (length) * 22mm (W) * 14mm (height)
2 Weight: 8g
3 Operating voltage :3.3 - 5 .5 V
4 clock chip: high-precision clock chip DS3231
5 Clock Accuracy :0-40 ° range, the accuracy 2ppm, the error was about 1 minute
6 calendar alarm clock with two
7 programmable square-wave output
8 Real time clock generator seconds, minutes, hours, day, date, month and year timing and provide valid until the year 2100 leap year compensation
9 chip temperature sensor comes with an accuracy of ± 3 °
10 memory chips: AT24C32 (storage capacity 32K)
11.IIC bus interface, the maximum transmission speed of 400KHz (working voltage of 5V)
12 can be cascaded with other IIC device, 24C32 addresses can be shorted A0/A1/A2 modify default address is 0x57
13 with rechargeable battery LIR2032, to ensure the system after power failure, the clock move any natural normal
14 Packing: single anti-static packaging
Wiring instructions (for Arduino uno r3 for example):
SCL → A5
SDA → A4
VCC → 5V
GND → GND

Specification:
1. Onboard TDA7297 audio power amplifier chip, dual-channel 15W 15W, suitable for 4-8 ohm 10-50W speakers
2. The main pins of the chip have been led out to facilitate the control of external devices. There are two 5.08 (mm) spacing 2P binding posts on the board to connect the left and right channels respectively.
3. The onboard dial potentiometer can adjust the volume output
4. Support DC base, terminal block, pin header power input mode 3. The default is DC base, working voltage: 6-18V
5. Circuit board size: 45(mm)x33(mm)

Product Description
AM2302 Humidity Capacitance Digital Temperature and Humidity Module is a temperature and humidity sensor with calibrated digital signal output. It uses a dedicated digital module acquisition technology and temperature and humidity sensing technology to ensure that products with high reliability and excellent long-term stability. The sensor includes a capacitive sensing element and a high-precision temperature measurement element, and with a high-performance 8-bit microcontroller connected. Therefore, the product has excellent quality, ultra-fast response, anti-interference ability, cost-effective advantages. Each sensor is calibrated in an extremely accurate humidity calibration chamber. Calibration coefficients are stored in the form of a program in the microcontroller, the sensor within the detection signal processing to call these calibration coefficients. Standard single bus interface, making system integration easier and faster. Ultra-small size, low power consumption, signal transmission distance of up to 20 meters or more, making it all kinds of applications and even the most demanding applications the best choice. Products for the 3-pin (single bus interface) to facilitate connection. Special packaging can be provided according to user needs.
Second, the scope of application
HVAC, Humidifiers, Test and Inspection Equipment, Consumer Goods, Automobiles, Automatic Control, Data Loggers, Household Appliances, Humidity Regulators, Medical, Weather Stations and other related humidity detection controls.
Third, the product highlights
Ultra-low energy consumption, transmission distance, all automatic calibration, the use of capacitive humidity sensor, fully interchangeable, standard digital single-bus output, excellent long-term stability, high-precision temperature measurement components.
Fourth, the product parameters
Size: 40 * 23mm
Weight: 4g
Voltage: 5V
Ports: Digital bi-directional single-bus
Temperature range: -40-80 ± 0.5
Humidity range: 20-90% RH ± 2% RH
Platform :, single-chip

Feature
Length of Cable : 100CM
Size of Stainless steel sheath:6*50mm
Power supply range: 3.0V to 5.5V
Operating temperature range:-55°C to 125°C (-67°F to 257°F)
Storage temperature range:-55°C to 125°C (-67°F to 257°F)
Accuracy over the range of -10°C to 85°C: ±0.5°C.
Output leads: Yellow (VCC), Red (DATA), Black (GND)
waterproof
For each lead, we use 30pcs tinning lines, which is different from other DS18B20 sensor wires, it is soft and has better oxidation resistance ability
flexibility resistance
better thermal conductivit
package include：1pcs 1 Meter DS18B20 Stainless Steel Package Waterproof DS18b20 Temperature Probe Temperature Sensor