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2.8 inch OLED LCD module 
 
Note:
1 This OLED has Serial interface and Paralle interface (please chooes and remark when buying)
 
2 This OLED has 3.3V and 5V (please chooes and remark when buying)
 
2-11. Color depth: support 16 gray levels

 
2.8 inch OLED LCD module 
 
Note:
1 This OLED has Serial interface and Paralle interface (please chooes and remark when buying)
 
2 This OLED has 3.3V and 5V (please chooes and remark when buying)
 
2-11. Color depth: support 16 gray levels

 
BTS7960B H-bridge 43A high-power motor driverModuleOverview:
This driver uses Infineon chips BTS7960 composed of high-power drive full H-bridge driver module with thermal over-current protection. Double BTS7960 H-bridge driver circuit, with a strong drive and braking, effectively isolating the microcontroller and motor driver! High-current 43A
Features:
Double BTS7960 large current (43 A) H bridge driver;
5V isolate with MCU, and effectively protect MCU;
5V power indicator on board;
voltage indication of motor driver output end;
can solder heat sink;
 
 
Just need four lines from MCU to driver module (GND. 5V. PWM1. PWM2);
isolation chip 5 V power supply (can share with MCU 5 V);
size: 4 * 5 * 1.2 cm;
Able to reverse the motor forward, two PWM input frequency up to 25kHZ;
two heat flow passing through an error signal output;
isolated chip 5V power supply (can be shared with the MCU 5V), can also use the on-board 5V supply;
the supply voltage 5.5V to 27V;

Description:
1.This protection board is 3s 4s 5s in common use LiFePo battery protection board (you can adjust for how many strings to be used), the default delivery is 5S ternary lithium.
2.Specified chip, stable performance, support disconnection protection, over-current protection, over discharge protection, overcharge protection, with balance, etc.
3.Common use for “same port” and “different port”, the protection board uses 15 high-power of ultra-low resistance MOS tube (discharge of 8, charging of 7), in the same port mode can support the discharge current 60A, charging current 60A; different port mode discharge current 80A, charging current 60A.
4.Can use for LiFePo battery,battery packs etc.
Parameter:
Single cell battery overcharge protect voltage : 3.61-3.69 V 
Single cell battery overcharge  protect recover voltage : 3.5-3.6V
Overcharge protect delay : 1.5-2.5S 
Single cell battery over-discharge  protect voltage : 2.27-2.43 V  
Single cell battery over-discharge  protect recover voltage : 2.45-2.65 V
Overcharge protect Current : 100A 
Over-discharge protect Current : 100A 
Over-discharge protect delay : 0.5-1.5S 
Temperature protect : Yes,have Temperature control interface.
Disconnect protect : Yes
Shortage protect : Yes
Shortage delay : 100-600 uS
Shortage protect recover mode: Off load release.
Contact discharge current:80A
Synopline discharge current:60A
Charging current:60A
balance function:yes
Ampere balance (Current) : 50MA  
Voltage alance accuracy : 3.355-3.455 V 
 

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

Features:
This is a brand new MCP2515 CAN bus module TJA1050 receiver SPI protocol
Compatible with Arduino based micro-controller projects.
Specifications:
Support CAN V2.0B specification, the communication speed 1Mb / S
0 to 8-byte data field
Three frames - standard, expand the frame and remote
DC5V power supply module & SPI interface protocol control
120 ohm termination resistors, Impedance matching, ensure drive capacity, long-distance data transmission against signal radiation
Module dimensions 4. 4 x 2.8 cm/1.57*1.1" (approx.)
Working Current - typ. 5mA & 1μA standby current
Working Temperature - (Industrial grade) -40°C - 85°C
DESCRIPTION:
 
Support CAN V2.0 B  , Communication rate up to 1Mb/S
Power supply: DC 5V , SPI Protocol Control
Work current: 5mA , 
Size: 4*2.8 cm ,   standby current: 1uA
Working temperature: -40 C -   85 C
120 Ohm terminal resistance, Impedance matching and guarantee the ability to drive

MAX7219 dot matrix module microcontroller module 4 in one display
 
MAX7219 Display Panel Dot Matrix Module Microcontroller 4 In One Display with 5P Line 4 in 1 Red Green for Arduino diy kit
 
 
A single module can drive a 8x8 dot matrix common cathode
Operating Voltage: 5V
A single module can drive a 8x8 dot matrix common cathode
Operating Voltage: 5V
Dimensions: 12.8X12.8X1.3cm/
Fixing screws with 64 holes with a diameter 3mm
Module with input and output interfaces, support for cascading multiple modules
Quality:1Set
The left side of the module to the input port, the right to an output port
When the control of a single module, simply input port connected to CPU
When a plurality of cascaded modules, input and output termination CPU, an input terminal of the second output end of the first module a module, the first two modules of the input terminal of the three termination modules, and so on...
51 microcontrollers, for example:
VCC 5V
GND GND
DIN P2.2
CS P2.1
CLK P2.0
Size for manual measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon.
And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

MAX7219 dot matrix module microcontroller module 4 in one display
 
MAX7219 Display Panel Dot Matrix Module Microcontroller 4 In One Display with 5P Line 4 in 1 Red Green for Arduino diy kit
 
 
A single module can drive a 8x8 dot matrix common cathode
Operating Voltage: 5V
A single module can drive a 8x8 dot matrix common cathode
Operating Voltage: 5V
Dimensions: 12.8X12.8X1.3cm/
Fixing screws with 64 holes with a diameter 3mm
Module with input and output interfaces, support for cascading multiple modules
Quality:1Set
The left side of the module to the input port, the right to an output port
When the control of a single module, simply input port connected to CPU
When a plurality of cascaded modules, input and output termination CPU, an input terminal of the second output end of the first module a module, the first two modules of the input terminal of the three termination modules, and so on...
51 microcontrollers, for example:
VCC 5V
GND GND
DIN P2.2
CS P2.1
CLK P2.0
Size for manual measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon.
And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

12V Water Flow Sensor DC 5-18V Flowmeter Hall Flow Sensor Water Control Liquid Flow Sensor Switch 1-30L/min 2.0MPa YF-S201
Description:
 
External threads: 1/2"
temperature: -25~ 80 
Allowing pressure: pressure 1.75Mpa
Operating humidity range: 35% ~90% RH (no frost)
Use temperature: 80
Load capacity: 10 mA (DC 5V)
Working voltage range: DC 5~18 v
Maximum operating current: 15 mA (DC 5V)
The lowest rated working voltage: DC 4.5 5V-24V
Size : 6x4cm
Color : Black
 
Package Included:
 
10 x Water Flower Sensor
 

With optocoupler 8 channel 8-channel relay control panel PLC relay 5V module for arduino

 
tem Description
Features for 1602 LCD:
LCD display module with blue blacklight.
Wide viewing angle and high contrast.
Built-in industry standard HD44780 equivalent LCD controller.
Commonly used in: copiers, fax machines, laser printers, industrial test equipment, networking equipment such as routers and
storage devices.
LCM type: Characters
Can display 2-lines X 16-characters.
Voltage: 5V DC.
Module dimension: 80mm x 35mm x 11mm.
Viewing area size: 64.5mm x 16mm
Features IIC/I2C :
1602 I2C interface 4-wire 1602 screen
IO port of control board is only 20,so IO ports is not enough for many sensor, SD card, relay modules.
The original 1602 screen need 7 IO ports to drive up, and this module can save 5 IO ports
 

 
tem Description
Features for 1602 LCD:
LCD display module with blue blacklight.
Wide viewing angle and high contrast.
Built-in industry standard HD44780 equivalent LCD controller.
Commonly used in: copiers, fax machines, laser printers, industrial test equipment, networking equipment such as routers and
storage devices.
LCM type: Characters
Can display 2-lines X 16-characters.
Voltage: 5V DC.
Module dimension: 80mm x 35mm x 11mm.
Viewing area size: 64.5mm x 16mm
Features IIC/I2C :
1602 I2C interface 4-wire 1602 screen
IO port of control board is only 20,so IO ports is not enough for many sensor, SD card, relay modules.
The original 1602 screen need 7 IO ports to drive up, and this module can save 5 IO ports
 

 
0.96 4 Pin OLED
  Interface type: IIC interface
   Pin definition: GND, VCC, SCL, SDA
   1.GND(OLED power supply
   2.VCC (OLED 3.3~5V)
   3.SCL(OLED IIC Clock line)
   4.SDA(OLED IIC Cable)

 
0.96 4 Pin OLED
  Interface type: IIC interface
   Pin definition: GND, VCC, SCL, SDA
   1.GND(OLED power supply
   2.VCC (OLED 3.3~5V)
   3.SCL(OLED IIC Clock line)
   4.SDA(OLED IIC Cable)

 
0.96 4 Pin OLED
  Interface type: IIC interface
   Pin definition: GND, VCC, SCL, SDA
   1.GND(OLED power supply
   2.VCC (OLED 3.3~5V)
   3.SCL(OLED IIC Clock line)
   4.SDA(OLED IIC Cable)

 
0.96 4 Pin OLED
  Interface type: IIC interface
   Pin definition: GND, VCC, SCL, SDA
   1.GND(OLED power supply
   2.VCC (OLED 3.3~5V)
   3.SCL(OLED IIC Clock line)
   4.SDA(OLED IIC Cable)

1.  Product features:                          
1. Meet UL, CE requirements,                                         
2. Ultra-thin, ultra-small
3. All voltage input (AC: 90 ~ 264V)                                  
4. Low ripple and low noise
5. Output overload and short circuit protection
6. High efficiency, high power density
7. The product is designed to meet the requirements of EMC and Safety Test
8. Low power consumption, environmental protection, no-load loss <0.1W
9.100% load aging and testing
10.1 year warranty perio

4.Safety Characteristics:
4.1 Products designed to meet UL, CE safety certification requirements.
 4.2 Safety and electromagnetic compatibility
Designed with the input of 0.5A UL certified insurance;
PCB board using double-sided copper clad plate production, material for the 94-V0 fire rating level;
Safety standards: Compliance with UL1012, EN60950, UL60950
Insulation voltage: I / P-O / P: 2500VAC
Insulation resistance :I / PO / P> 100M Ohms / 500VDC 25 C  70% RH
Conduction and radiation :comply with EN55011, EN55022 (CISPR22)
Electrostatic discharge :IEC / EN 61000-4-2 level 4 8kV / 15kV
RF radiation Immunity: IEC / EN 61000-4-3 See Application Note
4.3 Temperature safety design
At room temperature,the capacitors of this power , the inner surface of the main converter maximum temperature does not exceed 90 C;
Shell maximum surface temperature does not exceed 60 C
5.Logo, packaging, transportation, storage
5.1 Logo
5.1.1 Product logo
In place of products labeled with signs, its content in line with national standards, industry standards.
5.1.2 Packaging logo
      Products marked with the manufacturer's name, address, zip code, product type, manufactured year, month, day on the box ;
Marked "up", "moisture" "Handle with care" and other transportation signs, all signs are in line with the provisions of GB 191.
5.2 Packaging
Products are separated using special plastic box packaging, with anti-vibration function, and in accordance with the provisions of GB 3873.
5.3 Transport
 packaged products can be shipped by any transportation service, there should be awnings in transport and no excessive vibration, impact, etc.
5.4 Storage
Products should be stored in compliance with GB 3873.
 

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
Description:
 
External threads: 1/2"
temperature: -25~ 80 centigrade
Allowing pressure: pressure 1.75Mpa
Operating humidity range: 35% ~90% RH (no frost)
Use temperature: ≤ 80centigrade
Load capacity: ≤ 10 mA (DC 5V)
Working voltage range: DC 5~18 v
Maximum operating current: 15 mA (DC 5V)
The lowest rated working voltage: DC4.5 5V-24V
Quantity:1PC
Size : 5.7cmX4cm/2.24''X1.57''
Color : white
Lead way:
Red IN connect the anode
Yellow OUT signal output line
Black GND connect the cathode

 
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

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Product Description
FEATURES :
1. Support 1.5V,1.8V,2.5V,3.5V and 5.0V.
2. Support all ALTERA products : CPLD ( MAX3000, MAX7000, MAX9000 and MAX II ) ; FPGA ( Stratix, StratixII, Cyclone, CycloneII, ACEX 1K, APEX20K and FLEX 10K ) ;Active serial configuration device (EPCS1, EPCS4, EPCS16)
---- Now we have tested chip using this tool is: Cyclone (EP1C3, EP1C6, EP1C12, EP1C20) ; Cyclone II (EP2C5, EP2C8, EP2C35) ; Stratix (EP1S10, EP1S20, EP1S25) ; Stratix II(EP2S60) ; FLEX10K(EPF10K10, EPF0K30) ; ACEX1K(EP1K30) ; MAX7000(MAX7128SLC84, MAX7128) ; AETC100(MAX3000, MAX3128) ; MAXII(MAXII240, MAXII570, MAXII1270) ; EPCS(EPCS1, EPCS4, EPCS16) ; EPC(EPC1, EPC4)
3. Support AS, PS and JTAG program ( with Verify and BankCheck function) .
---- When we tested the chip above , we use the different program mode: JTAG ( Cyclone, CycloneII, Stratix II, Flex10K, Acex1K, Max7000 and Max3000) ; AS ( EPCS1, EPCS4, EPCS16 ) ; PS ( Stratix , Stratix GX )
4. Support embedded logic analyzer function of SignalTapII
5. Support NIOS II communication and debugger -- When you use it to debug your Black Gold , it will not Pop-up warning
6. Faster -- about 6 times than ByteblasterII
7. USB interface ! -- you don't need a PC with serial port now
8. 100% compatible with Official ALTERA USB Blaster
Packing List
1, USB cable one
2,10 core JTAG data line 1
3, USB-Blaster driver installation instructions

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

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 
 

 
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

This small size Bluetooth 4.0 TTL transceiver module allows your target device communicate with.
your iPhone/iPAD, IOS 6 or Android 4.3 above devices. 
It's easy to use and completely encapsulated. 
You can set it as slave or master. 
You can use AT command set the baudrate.
Specifications:
Ultra-low standby power consumption 90uA~400uA 
Coverage up to 60 meters 
Built in PCB antenna 
Power input: 3.6V-6V DC(Can not higher than 6V) 
Size: 43mm x 15mm 
Color: Blue 
Net Weight: 4g

Waterproof 2S 3S 4S Li-ion Lithium Battery Capacity Indicator Electricity Power LED Display Board Meter Tester 8.4V 12.6V 16.8V

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
 
 
 

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:
1. Support the full range of STM32 SWD interface debugging, simple interface (including power supply), 4 line speed, stable work; Interface definition shell directly address! Don\'t need to read instructions!
2, support all series STM8 SWIM download debugging (common development environment such as IAR, STVD etc.) are supported. Support the software version is as follows:
ST - LINK Utility 2.0 and above
STVD 2 and above
STVP 3.2.3 and above
IAR EWARM V6.20 and above
IAR EWSTM8 V1.30 and above
KEIL RVMDK V4.21 and above
3. Support the firmware upgrade automatically, to ensure that the ST company product support. When they leave the firmware has been upgraded to the latest V2. The J17. S4.
4. Increase the 5 v power output, the output it can protect the I/O port, not afraid of error cause damage of ST - LINK V2!
5. Easy interface to use pure copper plating 2.54 spacing horn, with 20 cm dupont line, can deal with different target board line sequence, flexible connection;
6. Use U disk aluminum alloy shell to protect the mainboard, convenient to carry, not afraid of static electricity, not afraid of tumbling.

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

    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.
 

 
1.Product Features
1). The ultra-thin, subminiature
2). The full voltage input (90 ~ 264 Vac)
3). Low ripple and low noise
4). Output overload short circuit protection function
5). High efficiency and power density
6). Product design to meet the EMC and safety testing requirements
7). Low power consumption, green environmental protection, no-load loss < 0.1 W
8). 100% load test
9). Meet the requirements of UL, CE

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

 
 
Nodemcu V3 Lua WiFi module integrated ESP8266 additional memory 32M FLASH, USB serial port ch340g
WiFi modern ESP8266 32MB,
The module is based on a wide range of exploration ESP8266 system chips from expressif.
WiFi modern ESP8266 32MB, compatible with nodemcu board.
The extra memory size is 32MB. This is better for big library projects. You do not have to worry about the size of the memory.
Usb-ttl serial converter ch340g, mini USB socket.
DC 4 ~ 9v PowerIn pin VIN.
Pins 2.54mm (0.1 ") 15 X 2-wire pin set. Do not solder.
Combined with WiFi access points and featured stations microcontrollers using Lua programming language based on simple.
WIFi modern ESP8266 32MB,
Provide: Hardware IO. Can be used in the IDE event-driven API network application 10 d0-d10, PWM function programming, IIC and SPI communication, in a board WiFi wireless network and ADC (A0, etc. can be used as access points and / or stations, host servers ), Connect to the Internet, get or upload data. Developing panels can be used in developing countries.

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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

SMD LED -5050 Diode
COLOR:UV/Purple
SIZE:5.0*5.0*1.9mm
HUE:390-410nm
REF:3.0-3.6v
I(MA):20-60ma
QTY:500PCS

An upgraded version of the old version more than two functions.
 
1, pin location changed
 
2, compatible nodemcu

1. Description:
This product is a stereo Bluetooth amplifier module. The Bluetooth version is 4.2.
 
2. Features:
1>. The version is 4.2. It can be compatible with all mobile phones and Bluetooth adapters on the market.
      2>. The distance is 15 meters in open space.
      3>. It supports automatically connecting devices that have been paired and playing music automatically.
      4>. F class power amplifier 5W 5W, high power output, over 8002 sound quality.
      5>. It supports USB sound card, no drive, plug and play.
      6>. Good sound quality, suitable for upgrading and refitting the idle sound box and DIY production.
 
3. Instructions:
      1>. Support USB sound card, free drive, plug and play (normal lithium battery power supply situation).
      2>. This product has dual 5W power amplifier circuit. It can not be used in addition to the power amplifier. The output of two amplifiers can not be connected in parallel or connected to the negative electrode, otherwise the power amplifier chip will be damaged.
      3>. There are two 2-8 European and 3-10W speakers respectively, and 3 European 5W and 4 European 10W horn are used. The output is stereo.
      4>. Maximum working current is 5V 2A, using 5V 2A or more voltage power supply, sound quality will be better.
      5>.It is suggested that a 3.7-5V lithium battery (the lithium battery needs a protective plate! It can charge a lithium battery with a USB rechargeable battery, and the USB port can not be used as a power supply port.) or a 5V adapter be used for power supply. It can not use voltage and current unstable power supply, such as dry battery, portable charger, multi-function transformer and so on.
      6>. When the Bluetooth board is installed, the antenna should not be close to the metal parts so as not to affect the transmission distance.
 
4. Operation:
      Start the cell phone Bluetooth, scan the device, find the "DW-CT14 " to click connection.
 
5. Note:
The charging interface of this product is a current limiting charging mode without charge management. For your safety, be sure to use a regular lithium-ion battery with a protective plate, which can cause loss due to improper use.
 
6. Package list:
Main board plug line

ATTINY85 module Black:
1. Support for the Arduino IDE 1.0 (OSX/Windows/Linux).
2. Power via USB or External Source or 7-16 v to 5 v (automatic selection).
3. The On - board, 150 ma 5 v Regulator.
4. Built - in USB and serial was debugging).
5. 6 I/O Pins (2 are informs the for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB).
6. 8 k Flash Memory (about 6 k after bootloader).
7. The I2C and SPI (vis USI).
8. PWM on 3 pins (more possible with Software PWM).
9. The ADC on 4 pins.
10. The Power LED and the Test/Status leds.
The Specs:
1. Support for the Arduino IDE 1.0 (OSX/Win/Linux).
2. Power via USB or External Source - 5v or 7-16v (automatic selection).
3. On-board 150ma 5V Regulator.
4. Built-in USB (and serial debugging).
5. 6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB).
6. 8k Flash Memory (about 6k after bootloader).
7. I2C and SPI (vis USI).
8. PWM on 3 pins (more possible with Software PWM).
9. ADC on 4 pins.
 
 
ATTINY85 module Blue
1. Support for the Arduino IDE 1.0 (OSX/Win/Linux).
2. Power via USB or External Source - 5v or 7-16v (automatic selection).
3. On-board 150ma 5V Regulator.
4. Built-in USB (and serial debugging).
5. 6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB).
6. 8k Flash Memory (about 6k after bootloader).
7. I2C and SPI (vis USI).
8. PWM on 3 pins (more possible with Software PWM).
9. ADC on 4 pins.
10. Power LED and Test/Status LED

ATTINY85 module Black:
1. Support for the Arduino IDE 1.0 (OSX/Windows/Linux).
2. Power via USB or External Source or 7-16 v to 5 v (automatic selection).
3. The On - board, 150 ma 5 v Regulator.
4. Built - in USB and serial was debugging).
5. 6 I/O Pins (2 are informs the for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB).
6. 8 k Flash Memory (about 6 k after bootloader).
7. The I2C and SPI (vis USI).
8. PWM on 3 pins (more possible with Software PWM).
9. The ADC on 4 pins.
10. The Power LED and the Test/Status leds.
The Specs:
1. Support for the Arduino IDE 1.0 (OSX/Win/Linux).
2. Power via USB or External Source - 5v or 7-16v (automatic selection).
3. On-board 150ma 5V Regulator.
4. Built-in USB (and serial debugging).
5. 6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB).
6. 8k Flash Memory (about 6k after bootloader).
7. I2C and SPI (vis USI).
8. PWM on 3 pins (more possible with Software PWM).
9. ADC on 4 pins.
 
 
ATTINY85 module Blue
1. Support for the Arduino IDE 1.0 (OSX/Win/Linux).
2. Power via USB or External Source - 5v or 7-16v (automatic selection).
3. On-board 150ma 5V Regulator.
4. Built-in USB (and serial debugging).
5. 6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB).
6. 8k Flash Memory (about 6k after bootloader).
7. I2C and SPI (vis USI).
8. PWM on 3 pins (more possible with Software PWM).
9. ADC on 4 pins.
10. Power LED and Test/Status LED

L298N Module Dual H Bridge Stepper Motor Driver Board Modules for Arduino Smart Car  FZ0407
Product description:
The L298N driver module, using ST L298N chip can directly drive two 3-30V DC motor, and provides a 5V output interface, you can chip circuitry to 5V power supply, support 3.3VMCU control, you can easily control the DC motor speed and direction, you can also control the 2-phase stepper motor, smart car essential.
Product parameters:
1 Driver chip: L298N dual H-bridge driver chip
2 Terminal driver part of the supply area VMS: 5 V ~ 35 V
3 Drive part of the peak current Io: 2A / Bridge
4 Logical part of the terminal power supply range Vss :4.5-5 .5 V
5 Logical part of the operating current range: 0 ~ 36mA
6 The control signal input voltage range: 4.5-5.5V low 0V high
7 Maximum power consumption: 20W
8 Storage temperature: -25 ~ 130
9 Driver Board Size: 55mm * 60mm * 30mm
10 Driver board Weight: 33g
11 Other features: control direction indicator, power indicator, current detection, logical part of the plate to take power interface.
Package included:
20 x L298N Module

Name: ADXL335 module (triaxial accelerometer analog output)
Model: GY-61
Using the chip: ADXL335
Power supply :3-5v
Analog X, Y, Z three-axis output
Direct output angle code

Pay special attention to; The following are wrong connection methods:
 
Of the following does not belong to quality problems, are all wiring error, not warranty caveat emptor:
1, since the voluntary testing after the success, the use of TXD or RXD and short circuit
2, module meet the power supply cause damage
 
Product features:
Using HC - 06 from module 1, a core module, which leads to the interface includes VCC, GND, TXD, RXD, reserved LED state output pin, MCU can state whether the bluetooth is connected through the foot, from machine KEY pin is invalid
2, the led indicates a bluetooth connection status, twinkle said there was no bluetooth connectivity, Chang Liang said bluetooth is connected and turned on the port
3, backplane "3.3 V, the input voltage 3.6 ~ 6 V, current when the unpaired about 30 ma, matching after about 10 ma, no more than 7 V input voltage!
4, interface level 3.3 V, can be connected directly to all kinds of single chip microcomputer (51, AVR, PIC, ARM, MSP430, etc.), 5 V single chip can be connected directly, without MAX232 couldn't through MAX232.
5, clearing the effective distance of 10 meters, more than 10 meters is possible, but not to this distance connection quality
After 6, pairing when full duplex serial port to use, do not need to know any bluetooth protocol, but supports only one in the eight data bits, stop bits and parity checking the communication format, which is the most commonly used communication format, does not support other formats.
7, when the bluetooth connection has not been established by pairing the AT command set baud rate, name, password, and set the parameters of the power save. After the bluetooth connection automatically switch to passthrough mode
8, small size (3.57 cm * 1.52 cm), SMT factory, ensure the quality of the patch. And set transparent heat shrinkable tube, dust and beautiful, and there are some antistatic ability.
9, this link for the machine, from the function and all kinds of computer with bluetooth, bluetooth host, with most of bluetooth mobile phone, PDA, PSP and other intelligent terminal pair, not matching between from the machine.
 
 
Small common sense (very important) :
TXD: sender, usually expressed as the sender, normal communication RXD must connect another equipment.
RXD: receiver, usually expressed as the receiver, the normal communication TXD must connect another equipment.
When normal communication itself TXD pick up equipment RXD forever!
From collect spontaneous: normal communication RXD TXD connect other devices, so if you want to receive your send data as the name implies, namely receive your sending data, namely own TXD directly connected to the RXD, used to test the send and receive is normal, is the easiest fastest test method, when there is a problem to do the test first to determine whether the product failure. Also known as the loop back test.

5A DC-DC adjustable step-down module with a voltmeter
One: Product Description
This product is a 180 KHz fixed frequency PWM buck (step-down) DC/DC module,capable of driving a 5A load with high efficiency, low ripple and excellent line and load regulation.The module with a voltage meter to display the input voltage and output voltage, and the voltage can be corrected through the button to improve the accuracy of the voltmeter.
Features:
1. LED power indicator.
2. Button to switch measurement of the input or output voltage, and LED indicates the current measurement of the input or output voltage; The nixie tube can be turned off by another button. Mentioned states are able to be memorized, is not lost even if the power is disconnected. (On-board marked "IN" LED is turned on, the nixie tube display input voltage value, "OUT" LED bright display is the output voltage value).
3. Special launch, the voltmeter calibration function, will never exist voltmeter inaccurate!
Voltmeter calibration method:
(1) Output voltage calibration steps
Step 1, adjust the right button so that "OUT" LED lighted, the voltmeter shows the value of output voltage; Press the right button for more than 2 seconds, release, voltmeter and "OUT" LED flashes in synchronization so that you enter the output voltage calibration mode.
Step 2, press the right button (normal speed), the voltage value is adding up a unit; Press the left button, minus a unit; Due to a unit is less than 0.1V, the minimum voltage display to 0.1V, so you need to continuously press 1-5 times to see the voltmeter change 0.1V, how many times voltmeter change 0.1V by pressing the key, depending on the current display voltage, the higher the voltage, the fewer the number of press.
Step 3, press the right button for more than 2 seconds, release, to exit the output voltage calibration mode. All parameters set to automatically power down to save.
(2) Input voltage calibration steps
Step 1, adjust the right button so that "IN" LED lighted, the voltmeter shows the value of input voltage; press the right button for more than 2 seconds, release, voltmeter and "IN" LED flashes in synchronization so that you enter the input voltage calibration mode.
Steps 2 and 3, consistent with the output voltage calibration method.
Two: Performance parameters
1.Input voltage range:4~38VDC(Note:input voltage not exceeding 38V)
2.Output voltage range:1.25-36VDC adjustable
3.Output current: 0-5A
4.Output power: 75W
5.voltmeter range: 4 to 40V, error ±0.1V
6.Operating frequency: 180KHz
7.High efficiency up to 96%
8.Built in thermal shutdown function
9.Built in current limit function
10.Built in output short protection function
11.Input reverse polarity protection: None (if required, high current diode in series with the input).
12.L x W x H =6.6*3.9*1.8CM 
Three: application
The DC/DC buck module applications the input voltage is higher than the output voltage of the buck field, such as battery, power transformer, DIY adjustable regulated power supply, LCD Monitor and LCD TV,portable instrument power supply,telecom/networking equipment,24V vehicle notebook power supply,industrial equipment buck.12V buck to 3.3V, 12V buck to 5V,  24V buck to 5V,24V buck to 12V,  36V buck to 24V etc.

Product Parameters
1. Accuracy: - 2.5°C (4.5°F).
2. Maximum frame rate: 10Hz,
3. Power supply: 3~5V
4. Temperature Measurement Range: 0°C to 80°C (32°F to 176°F)
 
Product Description
1. The AMG8833 infrared camera sensor is an 8x8 infrared thermal sensor array. When connected to your microcontroller (or Raspberry Pi), it will return a set of 64 individual infrared temperature readings via I2C. It's like those fancy thermal cameras, but it's compact and simple and easy to integrate. The AMG8833 offers higher performance than the previous AMG8831. The sensor only supports I2C and has a configurable interrupt pin that can be triggered when any single pixel is above or below your set threshold.
2. It can detect humans from a distance of up to 7 meters (23) feet. It is a perfect fit for creating your own human detector or mini camera. We use this breakthrough code on or compatible (sensor communicates via I2C) or on Python's Raspberry Pi. On the Pi, thanks to the image processing help of the SciPy python library, we can insert an 8x8 grid and get some very good results!