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Description:
 
100% brand new and high quality.
ESP32 is already integrated antenna and RF balun, power amplifier, low-noise amplifiers, filters, and power management module. The entire solution takes up the least amount of printed circuit board area. This board is used with dual-mode Wi-Fi and Bluetooth chips, which is safe, reliable, and scalable to a variety of applications. 
 
 
Features: 
 
High performance-price ratio
Small volume, easily embeded to other products
DC 5V-12V 
1 analog input(3.2V max input)
A Micro USB connection
Compatible with for Arduino
D1 R32=WiFi Bluetooth UNO
 
Size: 6.8x5.3cm/2.68x2.09inch
 
 
 
 
 
 

NE555-Red：
1, Size: 3.1CM * 2.2CM 1, the main chip: NE555;
2, Input voltage: 5V-15VDC. 5V power supply, the output current can 15MA around; 12V power supply, the output current can 35MA around;
3, the input current: 100MA
4, the output amplitude: 4.2V V-PP to 11.4V V-PP. (Different depending on the input voltage, the output amplitude will be different)
5, the maximum output current: 15MA (5V power supply, V-PP greater than 50% ), 35MA (12V power supply, V-PP greater than 50% )
 
The scope of this module:
1 is used as a square wave signal generator generates a square wave signal used for experimental development.
2 to drive a stepper motor for generating a square wave drive signal.
3 adjustable pulse generated for use by MCU.
4 adjustable pulse generation, control circuitry associated.
Advantages: 1, the output with LED indication, there is no output straightforward (low LED volume, high LED off frequency is relatively low, the LED flashes);
2, the output level selectable frequency range, the output frequency is more continuously adjustable; LF file: 1Hz ~ 50Hz IF file: 50Hz ~ 1kHz High-frequency file: 1KHz ~ 10kHz HF file: 10kHz ~ 200kHz
3, the output duty cycle can fine-tune, duty cycle and frequency is not separately adjustable, adjusting the duty cycle will change the frequency
4, the output frequency is adjustable; Period T = 0.7 (RA 2 RB) C RA, RB is 0-10K adjustable; Low profile when C = 0.001UF; IF stalls C = 0.1UF; High-frequency file C = 1UF; HF stalls C = 100UF, so the frequency of the waveform buyers can own calculations
 
NE555-Blue：
1. Onboard NE555 IC.
2. Single channel signal output, the output duty cycle about 50% square wave.
3. Plate load resistor, adjust the resistance to control the output frequency.
4. Onboard power indicator. 5. Working voltage: 5V~12V.

NE555-Red：
1, Size: 3.1CM * 2.2CM 1, the main chip: NE555;
2, Input voltage: 5V-15VDC. 5V power supply, the output current can 15MA around; 12V power supply, the output current can 35MA around;
3, the input current: 100MA
4, the output amplitude: 4.2V V-PP to 11.4V V-PP. (Different depending on the input voltage, the output amplitude will be different)
5, the maximum output current: 15MA (5V power supply, V-PP greater than 50% ), 35MA (12V power supply, V-PP greater than 50% )
 
The scope of this module:
1 is used as a square wave signal generator generates a square wave signal used for experimental development.
2 to drive a stepper motor for generating a square wave drive signal.
3 adjustable pulse generated for use by MCU.
4 adjustable pulse generation, control circuitry associated.
Advantages: 1, the output with LED indication, there is no output straightforward (low LED volume, high LED off frequency is relatively low, the LED flashes);
2, the output level selectable frequency range, the output frequency is more continuously adjustable; LF file: 1Hz ~ 50Hz IF file: 50Hz ~ 1kHz High-frequency file: 1KHz ~ 10kHz HF file: 10kHz ~ 200kHz
3, the output duty cycle can fine-tune, duty cycle and frequency is not separately adjustable, adjusting the duty cycle will change the frequency
4, the output frequency is adjustable; Period T = 0.7 (RA 2 RB) C RA, RB is 0-10K adjustable; Low profile when C = 0.001UF; IF stalls C = 0.1UF; High-frequency file C = 1UF; HF stalls C = 100UF, so the frequency of the waveform buyers can own calculations
 
NE555-Blue：
1. Onboard NE555 IC.
2. Single channel signal output, the output duty cycle about 50% square wave.
3. Plate load resistor, adjust the resistance to control the output frequency.
4. Onboard power indicator. 5. Working voltage: 5V~12V.

For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1015 provides 12-bit precision at 3300 samples/second over I2C. The chip can be configured as 4 single-ended input channels, or two differential channels. As a nice bonus, it even includes a programmable gain amplifier, up to x16, to help boost up smaller single/differential signals to the full range. We like this ADC because it can run from 2V to 5V power/logic, can measure a large range of signals and its super easy to use. It is a great general purpose 12 bit converter.
The chip's fairly small so it comes on a breakout board with ferrites to keep the AVDD and AGND quiet. Interfacing is done via I2C. The address can be changed to one of four options (see the datasheet table 5) so you can have up to 4 ADS1015's connected on a single 2-wire I2C bus for 16 single ended inputs.

Multi-Function Expansion Board DHT11
Multi-function expansion board DHT11 temperature and humidity LM35 temperature
Functions:
2-way button module
2-way LED module
Full color LED module
Infrared receiver module
Brightness sensor module
LM35D temperature sensor module
Passive buzzer module
Rotary potentiometer module
DHT11 temperature and humidity sensor module
1 I2C interface (A4 SDA, A5 SCL)
1 TTL serial port
2-way digital port (D7, D8)
1 analog port (A3)
Reset button
Fully compatible with Ard UNO R3 interface
Provides the basic experimental module of Ard beginners introduction
One board integrates multiple module functions
You don't need to solder, you don't need to connect, you can complete the experiment by downloading the program directly.
Provide all module code library files, all tested and ready to use
Reserved expansion port, can complete other module experiments
Customized high pin headers, no short circuit contact with the UNO board's USB interface

DHT21/AM2301 100% New Digital-output relative humidity & temperature sensor/module,connect with single-bus-line Sensor AM2301
AM2320B Digital Temperature and Humidity Sensor Module SHT21 AM2301 Digital Sensor for Arduino
Description:
1.4-pin package
2.Ultra-low power
3.No additional components
4.Excellent long-term stability
5.All calibration, digital output
6.Completely interchangeable
7.Long distance signal transmission
8.Relative humidity and temperature measurement
Specifications:
1.Type: AM2320B temperature and humidity sensor single bus / IIC compatible interface for AM2301 \ SHT21
2.Accuracy resolution: 0.1
3.Measurement range: 0-100% RH
4.Temperature measurement range: -40° ~ 80°
5.Humidity measurement precision: ±3% RH
6.Temperature measurement precision: ±0.5°

Product Introduction:
1.Size: 4.1*1.6cm
2.Board Thickness:1.6mm
3.Operating Frequency:2.405-2.485GHz
4.Wireless Transmission Speed Rate:250Kbaud
5.Power Consumption:<20mA (receiving);<25mA (transmission)
Features:
1.Lead Out 8 IO Ports 
2.Debug Pin
3.Matching Firmware To Achieve Analyzer Function

Signal Generator PWM Pulse Frequency Duty Cycle Adjustable Module LCD Display 3.3V-30V 1Hz-150Khz PWM Board Module

ESP8266 10A 220V Network Relay WIFI Module
 
Specifications:
Model: ESP8266
Color: Green
Size(L*W*H):65 x 40 x 18 mm
ISM: 2.4 GHz
PA: 25 dBm
Relay voltage: 220 V
Relay Current: 10 A
Input voltage: DC 7 V~30 V
Input overvoltage protection: Yes
Input overcurrent protection: Yes
 
Features:
1.More safe with relays PCB pin anti-climb design.
2.With ESP8266 Wifi module,4-layers board design.
3.One output status indicator, one input status indicator.
4.220V 10A relay, one normally open, one normally closed.
5.One way optocoupler isolation input, TVS input protection.
6.Access control server via TCP CLIENT mode Via HTTP protocol control.High-current terminals.
7.Input overvoltage protection, input with TVS, when voltage exceeds 33V, automatic protection will operate.

Description:
Want to make a hexapod walker? Maybe you're making a piece of art with tons of moving parts, or you need to drive a ton of LEDs with precise PWM output. Your microcontroller has a limited number of PWM outputs, and you find yourself running out! Not with the Adafruit 16-Channel 12-bit PWM/Servo Driver - I2C interface. With this pwm and servo driver breakout, you can control 16 free-running PWM outputs with just two pins! Need to run more than 16 PWM outputs? No problem. Chain together up to 62 of these beauties for up to an outstanding 992 PWM outputs.
Features:
Dimensions (no headers or terminal block) 2.5" x 1" x 0.1" (62.5mm x 25.4mm x 3mm)
Weight (no headers or terminal block): 5.5grams
Weight (with 3x4 headers & terminal block): 9grams
This board/chip uses I2C 7-bit address between 0x60-0x80, selectable with jumpers
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)
220 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
i2c-controlled PWM driver with a built in clock. 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

Industry-leading noise performance through proprietary 
amplifier and filter design techniques 
Integrated shield greatly reduces capacitive coupling from 
current conductor to die due to high dV/dt signals, and 
prevents offset drift in high-side, high voltage applications 
Total output error improvement through gain and offset 
trim over temperature 
Small package size, with easy mounting capability 
Monolithic Hall IC for high reliability 
Ultra-low power loss: 100 μΩ internal conductor resistance 
Galvanic isolation allows use in economical, high-side 
current sensing in high voltage systems 
3.0 to 5.5 V, single supply operation 
120 kHz typical bandwidth 
3 μs output rise time in response to step input current 
Output voltage proportional to AC or DC currents 
Factory-trimmed for accuracy 
Extremely stable output offset voltage 
Nearly zero magnetic hysteresis

    Parameters:
The module name: 12A buck perfect version
The modular nature: non isolated buck module     
Input voltage: 4.5-30V input voltage should not exceed 30V!!!
Output voltage:1.25-30V continuous adjustable
Output current: 0-12A 100W to strengthen the heat up to 200W,
Working temperature: -40~ 85 degrees
Operating frequency: 300KHz
Conversion efficiency:maximum  95% (efficiency is related to the input, the output voltage, current, pressure difference)
Short circuit protection:have (current limiting 14A) please try not to short circuit
Over temperature protection:have (automatic shutdown output ultra temperature)
Input reverse connection protection: No, (such as the need to please series diodes in the input)
Installation: 4pcs 3mm screws
Connection: connecting terminal, without welding, V-IN input, V-OUT output, with the housing modules for welding line output
Module size: length 60mm width 51mm high 22mm
Scope of application:
This module can be applied to the field of the input voltage higher than the output voltage,    
such as battery, power transformer, DIY adjustable regulated power supply, 24V vehicle notebook
power, vehicle LED lamp with power supply, industrial equipment, buck, 12V to 3.3V, 12V to 5V,
24V to 5V, 24V to 12V etc.
 

 
Features:
Good quality and durable.
Small size and super bright.
Low heat, energy saving, low power consumption, long service life.
Best replacement for traditional light sources.
Can be used as light decorations, torches, toys & gifts, car decorations, light box advertising, signal indicator, etc.
Specifications:
Diameter: 5mm
Emitted color: UV/ Purple
Lens Colour : Water Clear
Wave Length:395~400nm
Forward Voltage (V) : 3.2 ~ 3.8
Reverse Current (uA) : <=30
Luminous Intensity Typ Iv (mcd) : Average in 2000
Life Rating : 100,000 Hours
Viewing Angle : 20 ~ 25 Degree
Absolute Maximum Ratings (Ta=25°C)
Max Power Dissipation : 80mw
Max Continuous Forward Current : 30mA
Max Peak Forward Current : 75mA
Reverse Voltage : 5~6V
Lead Soldering Temperature : 240°C (<5Sec)
Operating Temperature Range : -25°C ~ 85°C
Preservative Temperature Range : -30°C ~ 100°C
Package:
100pcs 5mm Round UV Led Light Emitting Diode

Features: 
These are all the parts, it need your own welding and installation
 
 
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
 
2. The Function Generator component parameter table
 
Note

label

type

parameters
R1

resistor

1K

Regardless of the polarity
R2

Adjustable resistance

B503=50K

(by screen printing layer)
R3, R5,R6

resistor

5.1K

Regardless of the polarity
R4

resistor

330

Regardless of the polarity
R7

Adjustable resistance

B503=50K

(by screen printing layer)
R8

Adjustable resistance

B104=100K

(by screen printing layer)
C1,

Electrolytic capacitor

100UF

The positive short feet negative long feet
C2

non-polar capacitors

104

Regardless of the polarity
C3,C4

Electrolytic capacitor

10UF

The positive short feet negative long feet
C5

non-polar capacitors

105

Regardless of the polarity
C6

non-polar capacitors

473

Regardless of the polarity
C7

non-polar capacitors

222

Regardless of the polarity
C8

non-polar capacitors

101

Regardless of the polarity
U1

IC

XR2206

(by screen printing layer)
JK1

DC POWER

 

(by screen printing layer)
J1

2PIN Jumper cap

XM2.54

Regardless of the polarity
J2

2PIN Jumper cap

XM2.54

Regardless of the polarity
P1

Signal wire terminal

 

(by screen printing layer)
J3

2*5P Jumper cap

 

 
 
3The 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
 
4 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
5 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
6Schematic diagram of Function Generator

Features: 
These are all the parts, it need your own welding and installation
 
 
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
 
2. The Function Generator component parameter table
 
Note

label

type

parameters
R1

resistor

1K

Regardless of the polarity
R2

Adjustable resistance

B503=50K

(by screen printing layer)
R3, R5,R6

resistor

5.1K

Regardless of the polarity
R4

resistor

330

Regardless of the polarity
R7

Adjustable resistance

B503=50K

(by screen printing layer)
R8

Adjustable resistance

B104=100K

(by screen printing layer)
C1,

Electrolytic capacitor

100UF

The positive short feet negative long feet
C2

non-polar capacitors

104

Regardless of the polarity
C3,C4

Electrolytic capacitor

10UF

The positive short feet negative long feet
C5

non-polar capacitors

105

Regardless of the polarity
C6

non-polar capacitors

473

Regardless of the polarity
C7

non-polar capacitors

222

Regardless of the polarity
C8

non-polar capacitors

101

Regardless of the polarity
U1

IC

XR2206

(by screen printing layer)
JK1

DC POWER

 

(by screen printing layer)
J1

2PIN Jumper cap

XM2.54

Regardless of the polarity
J2

2PIN Jumper cap

XM2.54

Regardless of the polarity
P1

Signal wire terminal

 

(by screen printing layer)
J3

2*5P Jumper cap

 

 
 
3The 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
 
4 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
5 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
6Schematic diagram of Function Generator

Description
Module name :250W boost constant current module
Module properties: non-isolated step-up module (BOOST)
Input voltage: DC8.5V-48V
Input current: 10A (MAX) exceeds 8A please enhance heat dissipation
Quiescent current: 10mA (12V liter 20V, the output voltage, the higher
the current will increase too quiet)
Output voltage: 10-50V continuously adjustable
Constant] range: 0.2-8A
Temperature: -40 to 85 degrees (ambient temperature is too high, please enhance heat dissipation)
Operating frequency: 150KHz
Conversion efficiency: up to 96%
Overcurrent protection: There
Input reverse polarity protection: Yes,
Installation: 4 3mm screw holes
Connection method: Connection Output
Module size: Length 70mm width 36mm height 13mm
Single module: 50 g
Applications:
1, DIY a power supply, 12V can input and output can 12-50V adjustable.
2, the power supply for your electronic device, according to your
system can set the output voltage value.
3, as the car power supply for your laptop, PDA or a variety of digital
products supply.
4, DIY a mobile notebook power supply: 12V coupled with high-capacity
lithium battery pack, so you can go where light where books.
5, solar panel regulator.
6, to the battery, rechargeable lithium batteries.
7, driving high-power LED lights.

Output Current : 1.5A ( minimum ), 2.2A ( typical value )
Input-output voltage difference (VI-VO): 40Vdc ( max )
Adjustable output voltage range : 1.2 ~ 37V
Working temperature : -55 ° C to 150 ° C
Current output : 1.5A
Voltage Input : 4.2 ~ 40 V
Operating temperature : 0 ° C ~ 125 ° C
Characteristic frequency : 100 (MHz)
Module size : 35.6 (mm) x16.8 (mm)
Input mode : VIN input positive level , GND input negative
Output : VOUT output positive level , GND output negative

Smart Electronics FZ0455 4pin KEYES KY-016 Three Colors 3 Color RGB LED Sensor Module for Arduino DIY Starter Kit KY016

Big key module Big button module Light touch switch module with hat High level output for arduino

 
Overview: RGB LED module made from a plugin full-color LED, through the R, G, B three pin PWM voltage input can adjust the three primary colors (red/blue/green) strength so as to realize full color melange effect.With the Arduino module can realize the control of cool lighting effects. Second, the product parameters: Product Features: 1. The use of plug-in full-color LED 2. The RGB tricolor current-limiting resistance to prevent burn out (3) is obtained by PWM adjusting three primary colors can mix different colors 4. With a variety of single chip microcomputer interface 5. Working voltage: 5 v Module Parameters: 1. The PCB size: 15 mm * 10.6 mm 2. PCB color: green 3. USES 5050 full-color super bright LED 4. To prevent burn resistor LED 5. Can meet all kinds of single chip microcomputer 6. High light LED 7. Working voltage: 3.3 V / 5 V 8. Weight: 4 g 9. Can be used directly plugged into the motherboard Arduino, without dupont lines to connect

Never hunt around for another crystal again, with the Si5351A clock generator breakout ! This chip has a precision 25MHz crystal reference and internal PLL and dividers so it can generate just about any frequency, from <8KHz up to 150 MHz. The Si5351A clock generator is an I2C controller clock generator. It uses the onboard precision clock to drive multiple PLL's and clock dividers using I2C instructions. By setting up the PLL and dividers you can create precise and arbitrary frequencies. There are three independent outputs, and each one can have a different frequency. Outputs are 3Vpp, either through a breadboard-friendly header or, for RF work, an optional SMA connector. We put this handy little chip onto it's own breakout board PCB, with a 3.3V LDO regulator so it can be powered from 3-5VDC. We also put level shifting circuitry on the I2C lines so you can use this chip safely with 3V or 5V logic. Best of all, we even have a great tutorial and library to get you started! Our code is designed for use with the Arduino microcontroller and IDE but is easily ported to your favorite platform with I2C support Package: 1 x SSi5351A I2C Generator Clock Breakout Board 8KHz to 160MHz for Arduino

Bluetooth MP3 Decoding Board Module w/ SD Card Slot / USB 2.0 Port / FM / Remote
 
 
 
- Color: Black white
- Display Mode: Single cycle and repeat all switch, it is repeat all as opening
- Menu Language: English
- Display Size: 1.5"
- Memory Card Type: SD
- Max Extended Capacity: 8GB
- Audio Formats: MP3 / WMA
- Tuner Bands: FM
- FM Frequency: 85~108MHz
- Other Connections: 1 x USB 2.0 / 1 x SD card slot
- Power Supply: 12V
- Voltage: 7~12V
- The interval between installation hold: 90mm
- Supports external signal switch directly
- Supports Bluetooth 3.0 EDR
- Supports USB / SD card / Bluetooth / FM / Line auto switch
- Built-in MP3 / WMA song decoding chip
- Supports play from USB / SD card / MMC card
- Supports USB / SD card switch PREV / next / fast forward / fast reverse / volume adjustment / play / pause / single cycle / mute / shut off / direct Selection song
- Supports Bluetooth PREV / next / fast forward / fast reverse / volume adjustment / play / pause / single cycle / mute / shut off
- Supports FAT 16 / FAT 32; Supports MP1 layer / MP2 Layer / MP3 Layer
- Supports 32~320Kbps MP3
- Supports power cut memory function: Remember the song and the volume before power cut
- Working voltage: 12V; Current: 800mA~1A
- Including panel decoder remote control 2-pin plug wire with reverse voltage protection 3-pin audio plug wire
- Packing List:
- 1 x MP3 decoding board
- 1 x Remote control (1 x CR2025 battery, included)
Dimensions: 4.21 in x 1.54 in x 1.02 in (10.7 cm x 3.9 cm x 2.6 cm)
Weight: 0.78 oz (22 g)
 
 
can not use the router power!Can not use the charger power supply!Can be between 7 v and 12 v power supply in the family use, must be full wave rectifier, greater than 2200 uf capacitor filter to decode board after use.If take power in the power amplifier board, please note that if it is a dual power supply, power amplifier board can not meet in any power on all the way to decoding of double power supply circuit board power supply.Also can damage decoding board!Please separate to decode board power supply vehicle modified power requirement: decoding board power suggested in CDS circuit board through regulated power supply (not in the CD machine behind the terminal), decoding board can be stable job, also can avoid the common interference.Please don't pick up on the cigarette lighter or battery, vulnerable to automobile throttle size change caused by voltage change, and damage the decoder board.

Warm prompt:
 
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For example:
like this

Description:
SX1308 booster module carrying SX1308 chip, its packagnig is small, and high efficiency. The output power can be adjust, maximum can arrive 28V and its interior integrate the lowest RDS internal resistance 100mΩ metal oxide semiconductor field effect transistor (mosfet), which can realize large current output of up to 2A. It widely used in 3G network products, digital products, mobile power supply,battery power supply, equipment, etc.
 Features:
Oscillation frequency 1.2MHz
efficiency is as high as 95%
Circuit has short circuit protection, overheating protection function
10k to adjust potentiometer, adjust the output voltage
 
 Parameters:
Maximum input voltage: DC 2-24V
Maximum output voltage: DC 2-28V
Switching frequency: 1.2MHz
Maximum current output: 2A
Note : any questions, turn the potentiometer in one direction more than 10 rotations for try

Features:
Battery protection(Over charge or Over discharge)
Micro USB port Input
Type-A USB Output
0.5A current charging
1 switch control USB output
5~8V Input Voltage
3V & 1A Output
5V & 2A Output
LED indicate(Green means full,Red means charging)
3V output port x3
5V output port x3
Be careful of " " and "-", You should follow the direction of " ""-" on the PCB.
If you put wrong direction, charging chip will be destroyed.
This product does not include 18650 battery
Size: 9.8x2.9cm/3.86x1.14inch
Quantity: 1 Set
1.Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Features:
Battery protection(Over charge or Over discharge)
Micro USB port Input
Type-A USB Output
0.5A current charging
1 switch control USB output
5~8V Input Voltage
3V & 1A Output
5V & 2A Output
LED indicate(Green means full,Red means charging)
3V output port x3
5V output port x3
Be careful of " " and "-", You should follow the direction of " ""-" on the PCB.
If you put wrong direction, charging chip will be destroyed.
This product does not include 18650 battery
Size: 9.8x2.9cm/3.86x1.14inch
Quantity: 1 Set
1.Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Features:
Battery protection(Over charge or Over discharge)
Micro USB port Input
Type-A USB Output
0.5A current charging
1 switch control USB output
5~8V Input Voltage
3V & 1A Output
5V & 2A Output
LED indicate(Green means full,Red means charging)
3V output port x3
5V output port x3
Be careful of " " and "-", You should follow the direction of " ""-" on the PCB.
If you put wrong direction, charging chip will be destroyed.
This product does not include 18650 battery
Size: 9.8x2.9cm/3.86x1.14inch
Quantity: 1 Set
1.Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Features:
Battery protection(Over charge or Over discharge)
Micro USB port Input
Type-A USB Output
0.5A current charging
1 switch control USB output
5~8V Input Voltage
3V & 1A Output
5V & 2A Output
LED indicate(Green means full,Red means charging)
3V output port x3
5V output port x3
Be careful of " " and "-", You should follow the direction of " ""-" on the PCB.
If you put wrong direction, charging chip will be destroyed.
This product does not include 18650 battery
Size: 9.8x2.9cm/3.86x1.14inch
Quantity: 1 Set
1.Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid.
2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Electrical parameters: JSN-SR04T
Operating voltage: DC 5V
Quiescent current: 5mA
Total current work: 30mA
Acoustic emission frequency: 40khz
Farthest distance: 4.5m
Blind: 25cm
Wiring: 5V (positive power supply)
Trig (control side) RX
Echo (the receiver) TX
GND (negative)
Module size: 41mm * 28.5mm
Resolution: about 0.5cm
Angle: less than 50 degrees
Working temperature: -10 ~ 70 °
Storage temperature: -20 ~ 80 °
Product Features:
1, small size, easy to use;
2, low voltage, low power consumption;
3, high accuracy;
4, strong anti-jamming;
5, integrated with wire enclosed waterproof probe, suitable for wet, harsh measurement occasions.
Application:
1, Horizontal distance;
2, obstacle avoidance, automatic control;
3, the object approaches, there is a perceived
4, traffic control;
5, security, industrial control;
6, artificial intelligence, and research
The basic working principle:
(1) using IO port TRIG trigger location, to the high level signal of at least 10us;
(2) module automatically sends 8 40KHz Fang Bo, automatic detecting whether a signal return;
(3) a signal return, a high level is output through the IO port ECHO, the time duration of the high level is
ultrasonic from launch to return. The test distance = (high level time * speed of sound (340M/S)) /2;
This module uses the simple method, a control port with a 10US above high level, can wait for high level
output at the receiving port. An output can drive the timer, when this port is low can read the timer value,
this time for the location of the time, can be calculated distance. So constantly cycle test, that can achieve
the measurement of the value of your mobile.

Note
IT IS KITS ONLY. That is to say, all items are not welded on the pcb board.  Buyers have to weld them on the pcb board by themselves.
 
ONLY for professionals.  Kits assembled is not a very complex work but if you are not professional, item might get broken.  We cannot offer the warranty for incorrect welding and assembling.
 
 
Features   
1. Working voltage: DC 5V-12V   
2. Recommend voltage: DC 9V   
3. Recommend battery: CR2032 (3V)   
4. Working current: 35mA   
5. PCB Dimension: 90MM * 70MM
 
Description
1, 89C2051 digital clock kit, control chip AT89C2051, digital control using three two common male red LED digital tube display high definition brightness, because the scan is displayed, so that each digital control abcdefg each foot with a bus in parallel, change the resistance value R4-R10 can change the display brightness.
2, S1 button is used to calibrate the time, press and hold for more than two seconds to enter the calibration time status and exit quickly tap for adjusting the time value.
3, the circuit has added a 3V battery backup, power outage AT89C2051 using spare batteries, the clock does not stop, but digital is not displayed after the call backup battery out of action, AT89C2051 uses an external power supply, the digital tube display properly. So you can add a power switch, turn off the power when they go out, come back out again, the normal display, to achieve the purpose of saving electricity.
4, time accurate.
 
 
 
Package Include :
 
1 x 6 Digital LED Electronic Clock (battery is not included)

 

Notice: The new tracking number for China Post Ordinary Small Packet Plus can be traced only befor it arrive the airport of your country,please choose China Post Air Mail if you want a full tracking info.
 
Tracking info of  China Post Ordinary Small Packet Plus can be check here: www.17track.net/en
New Socket Adapter plate Board for 8Pin NRF24L01 Wireless Transceive module 51
 
Wireless module operating voltage is generally 3.3v, while the ordinary 51 microcontroller 5v, this module is easy toshop wireless module with 51 single system board used in conjunction.    
This module can be any one of 51 shop is directly connected to the system board, easy to use.    
It's for 8 Pin NRF24L01 Module    
This is a simple socket board which is for NRF24L01 Wireless module    
on-board AMS1117-3.3 chip    
It could be used with NRF24L01 Wireless module at our store.

Description:
MAXIM MAX6675 is an American company with a cold junction compensation, linearity correction, thermocouple break detection ADC Serial K-type thermocouple, its temperature resolution capability is 0. 25 Degree, cold junction compensation range - 20 ~ 80 Degree, wide operating voltage range 3. 0 ~ 5. 5V
 
 
Operating voltage: 3. 0 ~ 5. 5V
Internal integrated cold junction compensation circuit;
With a simple three serial interface;
Temperature signal can be converted into 12-bit digital
 
 
 
 
Temperature resolution of: 0. 25 Degree;
 
Cold junction compensation range: - 20 ~ 80 Degree,
Embedded thermocouple break detection circuitry.
Using SPI 3 wire communication
K-type temperature probe
Type K temperature range 0-800 degrees
 
 
Package Included:
 MAX6675 Thermocouple Temperature Sensor

Description:
MAXIM MAX6675 is an American company with a cold junction compensation, linearity correction, thermocouple break detection ADC Serial K-type thermocouple, its temperature resolution capability is 0. 25 Degree, cold junction compensation range - 20 ~ 80 Degree, wide operating voltage range 3. 0 ~ 5. 5V
 
 
Operating voltage: 3. 0 ~ 5. 5V
Internal integrated cold junction compensation circuit;
With a simple three serial interface;
Temperature signal can be converted into 12-bit digital
 
 
 
 
Temperature resolution of: 0. 25 Degree;
 
Cold junction compensation range: - 20 ~ 80 Degree,
Embedded thermocouple break detection circuitry.
Using SPI 3 wire communication
K-type temperature probe
Type K temperature range 0-800 degrees
 
 
Package Included:
 MAX6675 Thermocouple Temperature Sensor

Specification
The Development Kit -based on ESP8266, integates GPIO, PWM, IIC, 1 - Wire and ADC all in one board.
Power your developement in the fastest way combinating with NodeMCU Firmware!
USB to TTL included, plug&play
10 GPIO, every GPIO can be PWM, I2C, 1 - wire
The FCC CERTIFIED wi-fi module (" Coming soon)
PCB antenna

Description:
The AD9833 is a low power, programmable waveform generator capable of producing sine, triangular, and square wave outputs. Waveform generation is required in various types of sensing, actuation, and time domain reflectometry (TDR) applications. The output frequency and phase are software programmable, allowing easy tuning. No external components are needed. The frequency registers are 28 bits wide: with a 25 MHz clock rate, resolution of 0.1 Hz can be achieved; with a 1 MHz clock rate, the AD9833 can be tuned to 0.004 Hz resolution
    The AD9833 has a standard serial interface that allows the part to interface directly with several microprocessors. The device uses an external serial clock to write the data or control information into the device
    The AD9833WBRMZ-REEL model is available with controlled manufacturing to support the quality and reliability requirements of automotive applications. Note that this automotive model may have specifications that differ from the commercial models; therefore, designers should review the Specifications section of this data sheet carefully. Only the automotive grade product shown is available for use in automotive applications. Contact your local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for these models
    The AD9833 is written to via a 3-wire serial interface. This serial interface operates at clock rates up to 40 MHz and is compatible with DSP and microcontroller standards. The device operates with a power supply from 2.3 V to 5.5 V
    The AD9833 has a power-down function (SLEEP). This allows sections of the device that are not being used to be powered down, thus minimizing the current consumption of the part, e.g., the DAC can be powered down when a clock output is being generated
   
Features:
Digitally programmable frequency and phase
12.65 mW power consumption at 3 V
0 MHz to 12.5 MHz output frequency range
28-bit resolution: 0.1 Hz at 25 MHz reference clock
Sinusoidal, triangular, and square wave outputs
2.3 V to 5.5 V power supply
No external components required
3-wire SPI interface
Extended temperature range: −40°C to 105°C
Power-down option                                                          
Update Rate: 25(max)
VOUT Maximum: 0.65V
VOUT Minimum: 38mV
VOUT Temperature Coefficient: 200°
Input High Voltage: 1.7-2.8V
Input Low Voltage: 0.5-0.7V
Input Current: 10µA
Input Capacitance: 3pF
Operating temperature range is −40°C to 105°C; typical specifications are at 25°C
Size: 17*12mm/0.66*0.47"

Specifications
 
1 . module : 20.5mmx41mm
2 . the module weight : 57g 
Introduction to 1602 - character LCD
1602LCD main technical parameters :
1 . display capacity : 16x2 characters
2 . chip working voltage : 4.5-5.5V
3 . current : 2.0mA ( 5.0 V)
4 . module optimum working voltage : 5.0V
5 . character size : 2.95x4.35 ( W xH) mm

 1PCS Smart Electronics ESP-12F WeMos D1 WiFi uno based ESP8266 shield for arduino Compatible IDE

 
Description:
Material: Electrical components
Color: See pictures
ZB2L3 battery capacity tester discharge type 1.2-12    V external load capacity of the battery and other tests 18650
Tools, single-function, by controlling the load off and get real-time integrated discharge current capacity results
Maximum support 15V 3A discharged through the discharge voltage and current, itself does not discharge
Maximum capacity statistics support 9999Ah (9999000mAh)
Automatically identify and develop appropriate battery termination voltage can also be manually adjusted  
 
Specifications:
Power supply voltage: DC4.5-6V (micro USB connector)
Operating Current: less than 70mA
Discharge voltage: 1.00V-15.00V 0.01V resolution
Termination voltage range: 0.5-11.0V
Supported by current: 3.000A 0.001A resolution
Maximum voltage measurement error: 1% 0.02V
Maximum current measurement error: 1.5% - 0.008A
Maximum battery capacity range: 9999Ah (1Ah = 1000mAh) greater value by shifting the decimal point to switch, when the display is less than 10Ah X.XXX, as shown above to achieve 10Ah XX.XX, and so on.
Board size: 50mmX37mm
Finished Size: 50mmX37mmX17mm (length X width X height maximum position size, contains copper foot height)  
 
Instructions:
1. The first test should be fully charged battery.
2. Connect the battery to be tested positive to positive input, a negative input to the negative, can not be reversed (with load reversal may damage the circuit)! Load connected to the output of the positive and negative output, to work through the tester micro USB power supply (not available desktop or laptop USB powered), then the battery voltage.
3. Direct start test need only one press of the "OK" button, the tester can automatically develop an appropriate termination voltage of the battery full charge voltage, and will start flashing after the test three times. Need to develop artificial termination voltage only when the battery voltage display state by pressing " " or "-" buttons to modify the termination voltage display beginning with P, behind the representative voltage resolution 0.1V, set up after pressing the "OK "start testing.
4. After the start of the test the tester will control the load of the electronic switch is turned on, the test data shows that the process will release capacity (Ah), current discharge current (A) and battery voltage (V) between the wheel was. When the battery voltage reaches the set cut-off voltage, load control switches off the tester display data stays in capacity (Ah) and above and the corresponding indicator flashes quickly together, now displays the actual capacity of the battery is discharging capacity, about the press "OK" to terminate flashing allows stable data display, press again "OK" button to return to the power-on state can just replace the battery test the next section ......  
 
Error codes and their meanings:
Err1: battery voltage is above 15V
Err2: battery voltage is lower than the termination voltage
Err3: Battery can not afford to load or discharge current line too much resistance
Err4: overcurrent (current exceeds 3.1A)  
 
Note:    Use the resistance of the discharge process, resistive load will seriously heat, please pay attention to safety!
This circuit voltage in order to improve the measurement accuracy, specially designed DC bias, when the terminal displays nothing then a small voltage does not affect the actual measurement, if you are shorting the input terminals (absolute 0V) will show 0

Notice: The new tracking number for China Post Ordinary Small Packet Plus can be traced only befor it arrive the airport of your country,please choose China Post Air Mail if you want a full tracking info.
 
Tracking info of  China Post Ordinary Small Packet Plus can be check here: www.17track.net/en
 
 
 
 
This shell is designed specifically for Raspberry pie 2 generation of Raspberry PI 2 model design B black transparent shell, 5 pieces of acrylic, simple and easy to work the installation, all the open interface, easy to use GPIO, TF card, USB interface, to the as Raspberry pie is 3.2 inch, 3.5 inch screen and extended board best perfect matching case, without any tools can accomplish differ simple assembly, sturdy, pleasing appearance accord with the requirement of foreign trade of high quality.

 
Product description:
The rectifier filter board using ultra-high current 25A rectifier bridge, the two-way AC full-wave rectifier into dual direct current, using four 3300uf / 25V large capacitor to do filtering, 104 monolithic capacitors do decoupling, effectively suppress the AC clutter, Of the DC is more pure, as a dual power amplifier, can be used for LM1875, TDA2030, TDA7294, LM3886 and other low-power amplifier. Input voltage: Dual AC AC9-17V Output voltage: double DC DC ± 12V-24V Flat bridge parameters: 25A Size: 67 * 38 * 28MM

Warm prompt:
 
Dear buyer, Our cheapst transportation services Econmic category logistics (SunYou Economic Air Mail , China post Ordinary Small Packet Plus) can be traced only befor it arrive your country , please choose Standard category logistics if you want a full tracking info.
 
For example:
like this

Notice: The new tracking number for China Post Ordinary Small Packet Plus can be traced only befor it arrive the airport of your country,please choose China Post Air Mail if you want a full tracking info.
 
Tracking info of  China Post Ordinary Small Packet Plus can be check here : www.17track.net/en 
2. On board then 5.08 (mm) pitch 2P terminal to facilitate RS-485 communication wiring.
3.All pins of chip have been lead to can be controlled through the microcontroller.
4. Working voltage: 5V.
5. Board size: 44 (mm) x14 (mm).
 
 
Package Content:
        10 X MAX485 TTL TO RS485 Module