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Description:
Features:
USB to RS485 Converter Adapter
USB connector: to your PC
RS485 connector: to your RS485 device
No need external power, powered by USB port
Fully compliant USB 2.0 standard , backward compatible with USB1.1
Applications:
All kinds with RS485 port device parameter settings , data communication
Short distance , such as parameter settings of the computer peripheral equipment , the use of common data lines can be .
A and A port of the device when the wiring is connected , B and device B connected . Some devices D A and D, - B .
? LED display of communication data
? Machine PLC data reading and writing
? Monitoring data read and write , and PTZ control
? Centralized control of household electrical appliances
? Access Control System ; card
? A variety of industrial automation ; instrumentation
? Parking ; bus fees
? Dining Hall ; staff attendance
? Highway toll station; ATM machine
Specification:
Dimension:6.0 x1.8x1.4cm
Color: Black
Net weight: 8g
Packaging weight: 18g
Support System: Windows XP , Vista, Windows 7 , Linux , MacOS , and WinCE5.0 drive
Supports baud rate range : 75bps - 115200bps , up to 6Mbps
Supports Plug , Play and hot-swap ( USB side) ;
Better than using CH341D chip or similar chip to support the laptop USB port .
Communication distance up to 1.2KM, with anti-jamming performance of industrial site ;
Work temperature range: -40
Communication distance :1200m(max)
Package Content:
1 x USB to RS485 Converter
Note:
A. Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. 
B. Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying. 
C. We only ship to confirmed order address,your order address Must Match your recipient address.

Specifications: Model Number: XH-M609
Supply Voltage: DC 12-36V
Output Voltage: Equal to supply voltage
Control Precision: 0.1V Power: ＜1.5W
Application Range: Storage Batteries; Lithium Batteries
Size: 5.7x4.2cm/2.24x1.65"
Quantity: 10 Pc
Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid
Due to the difference between different monitors, the picture may not reflect the actual color of the item.

10PCS HLK-5M12

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
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.

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

Description:
 Here's a handy a rduino shield: we've had a lot of people looking for a dedicated and well-designed data logging shield. We worked hard to design an inexpensive, yet sophisticated design. Not only is it easy to assemble and customize, also equipped with extensive documentation and libraries.
You can get fast - to save the data to a file in any FAT16 or FAT32 formatted SD card, you can read any drawing, spreadsheet or analysis program. We even have an example of how to use two free software programs to plot your data tutorials
Including real-time clock with the current time stamp for all the data so that you know exactly what happened when!
Please note that this item does not come with an a rduino (you need to use the shield), or SD card. It does have the RTC battery, however. Now, the geology of fire to all components of the welding and testing, but not installed head. You need some basic soldering skills to put it together, but even if you do not have much experience, you can get it within 15 minutes to complete
SD card interface with FAT16 or FAT32 formatted card. 3.3V level shifter circuit to prevent damage to your SD card
Real-time clock (RTC) to maintain the time, even when the a rduino is unplugged. Backup battery lasted for many years
Including SD card and RTC libraries and sample code means you can get fast
Welded joints, circuits or sensors prototyping area.
Built-in 3.3V regulator is a reliable reference voltage, and a reliable operation, requires a lot of power to run the SD card
Compatible with a rduino UNO, Duemilanove, Diecimila, Leonardo or ADK / Mega R3 or higher. ADK / MEGA R2 or lower is not supported.
Package Included:
10 X Data Logger  for Arduino

10PCS HLK-5M03

Description:
1. This is a breakout board for the very handy 16-Channel Analog/Digital Multiplexer/Demultiplexer CD74HC4067. This chip is like a rotary switch - it internally routes the common pin (COM in the schematic, SIG on the board) to one of 16 channel pins (CHANxx). It works with both digital and analog signals (the voltage can't be higher than VCC), and the connections function in either direction. To control it, connect 4 digital outputs to the chip's address select pins (S0-S3), and send it the binary address of the channel you want (see the datasheet for details). This allows you to connect up to 16 sensors to your system using only 5 pins!
2. Since the mux/demux also works with digital signals, you can use it to pipe TTL-level serial data to or from multiple devices. For example, you could use it to connect the TX pins of 16 devices to one RX pin on your microcontroller. You can then select any one of those 16 devices to listen to. If you want two-way communications, you can add a second board to route your microcontroller's TX line to 16 device's RX lines. By using multiple boards, you can create similar arrangements for I2C, SPI, etc.
3. The internal switches are bidirectional, support voltages between ground and VCC, have low “on” resistance and low “off” leakage, and to prevent crosstalk, perform “break-before-make” switching. The board also breaks out the chip's “enable” pin, which when driven high, will completely disconnect the common pin (all switches “off”).
Features:
2V to 6V operation
“On” resistance: 70 Ohms @ 4.5V
6ns break-before-make @ 4.5V
Wide operating temperature range: -55C to 125C
Function: gathering all the way ADC 16 analog signals.
Use CD74HC4067 16-channel analog signal switch
Analog Input: C0-C15 16 channels
Analog output: DIG
Channel Control: S0-S3

The new 5V Relay Module
   Can be used as microcontroller development board module can be used as home appliance control
   5 V-12V to TTL control signal
   The control signal DC or AC, 220V AC load can be controlled.
   There is a normally open and one normally closed contact
   A power indicator light
   A control indicator, pull off, disconnect does not shine
   Transistor drive to increase the relay coil control pins high impedance.
   The control pin has a pull-down circuit to prevent malfunction relay vacant

Warm prompt:
 
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SMD LED -5050 RGB
Full Color - Red /Green/Blue
COMMON ANODE
SIZE:5.0*5.0*1.5 mm
HUE:620-625/520-530/460-475nm
Ref: 2.0-2.6/3.0-3.4/3.2-3.6 v
Low-Mid Power LED
I(Ma):60ma 
3-CHIP LED PLCC-6
QTY:2000PCS

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:
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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 
 

The Specs:
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/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.
10. Power LED and Test/Status LED .

Product Introduction
GP2Y0A02YK0F is a distance measurement sensor module.
It consists of three parts: PSD (position sensitive detector) and IRED (infrared emitting diode) and signal processing circuit. Due to the triangulation method, the material of the measured object, the ambient temperature and the measurement time do not affect the measurement accuracy of the sensor. The sensor output voltage value corresponds to the detected distance. By measuring the voltage value, the distance of the detected object can be obtained, so this sensor can be used for distance measurement, obstacle avoidance and the like.
 
Technical Parameters
Supply voltage: 4.5 to 5.5 V
Power consumption: nominal 33 mA
Packing size: 29.5 × 13 × 21.6 mm
Distance measurement range: 20 to 150 cm
Signal output type: voltage analog signal
Based on the principle of triangulation
Output is inversely proportional to distance
Analog output, requires microcontroller control with AD converter
The higher the AD number, the more accurate the distance measurement effect, and the 10-bit AD can reach 0.1cm.
SD card insertion detection and write protection detection ports are all pulled out for convenient function expansion

Stable and reliable chipset CP2102
USB specification 2.0 compliant with full-speed 12Mbps.
Standard USB type A male and TTL 5pin connector. 5pins for 3.3V,TXD,RXD,GND & 5V
All handshaking and modem interface signals
Baud rates: 300 bps to 1.0Mbps.
Byte receive buffer; 640 byte transmit buffer.
Hardware or X-On/X-Off handshaking supported.
Event character support Line break transmission.
USB suspend states supported via SUSPEND pins.
Temperature Range: -40° to 85°.
Supports Windows 98SE, 2003, XP, Vista, Window7, Mac OSX , Linux 2.6.x and 2.4.36
Maximum baud rate 115200 perfect support! No longer distressed STC12 Series, STC11, STC15 series Burn!
 

 
BBS:http://mh.nodebb.com Product introduction: The INMP441 is a high performance, low power, digital output, omnidirectional MEMS microphone with bottom port. The The complete INMP441 solution consists of a MEMS sensor, signal conditioning, analog to digital converter, anti-aliasing filter, power management and industry standard 24-bit I2S interface. The I2S interface allows the INMP441 to be directly connected to digital processors such as DSPs and microcontrollers without the need for an audio codec for use in the system. The INMP441 has a high signal-to-noise ratio and is an excellent choice for near field applications. The INMP441 has a flat wideband frequency response that results in high definition of natural sound. Product Features: 1. Digital I2S interface with high precision 24-bit data 2. High signal to noise ratio is 61 dBA 3. High sensitivity - 26 dBFS 4. Stable frequency response from 60 Hz to 15 kHz 5. Low power consumption: low current consumption 1.4 mA 6. High PSR: -75 dBFS Interface definition: SCK: Serial data clock for I2S interface WS: Serial data word selection for I2S interface L/R: Left/Right channel selection. When set to low, the microphone outputs a signal on the left channel of the I2S frame. When set to high level, the microphone outputs signals on the right channel SD: Serial data output of the I2S interface. VCC: Input power, 1.8V to 3.3V. GND: power ground This product provides tutorials for using ESP32 modules with I2S functionality. Connect to ESP32: INMP441 ESP32 SCK >> GPIO14 SD >> GPIO32 WS >> GPIO15 L/R >> GND GND >> GND VDD >> VDD3.3 What is the difference between an omnidirectional microphone and a unidirectional microphone: First of all, I understand that the sound divergence is all-round. One person speaks and diverge in the air. As for how far it can pass, it depends on many factors. 1.directional microphone, the general pickup radius is very small, 30 cm is a big one, single use, put it on the mouth, the sound quality is very good, because it is not picked up again. The shape is generally goose neck wheat, a rod, a curved rod, to your mouth, directivity, just listen to your voice. With a single-point microphone, the sensitivity is limited to a certain range. Sensitivity is too high, causing sharp whistling, etc., involving many other devices As for why not make a big pickup radius, there is a reason. Later 2.omnidirectional microphone, the general pickup radius is very large, one meter two meters three meters five meters have, compared with ten centimeters, this level is very different, it is not just picking a person's voice, but Multiple people, five six, seven eight or even ten. Omnidirectional microphones are highly sensitive, The omnidirectional microphone pickup radius is too large, and it will also pick up more ambient noise, so the sound quality is not as good as the single-point microphone, unless you do a good noise reduction. There is definitely a difference between collective use and single-person service. But omnidirectional wheat has a benefit, the wiring is simple, not one by one. Suitable for small meetings, ad hoc meetings, some remote discussions, remote operations. 3.single-point wheat generally supports local amplification, Omnidirectional microphones generally do not support local amplification. It should be noted that because of such high sensitivity, the local amplification whistling is very scary, and the current technology is difficult to deal with.

 
1, the Input voltage range: 6 ~ 38 VDC (Note: the Input voltage not exceeding 38 v)
2, the Output voltage range: 1.25-36 VDC adjustable
3, the Output current: 0-5 a
4, the Output power: 75 w
5, High efficiency up to 96%
6, Built in thermal shutdown function
7, Built in the current limit function
8, Built the output in short protection function
9, Input reverse polarity protection: None (if required, high current diode in series with the Input).
10, L x W x H = 61.7 * 26.2 * 15 mm
11, Weight: 20 g

Descritipion:
The main chip is GY-213V-HDC1080(Can use SHT21 HTU21D SI7021 chip to made the same sensor)
This I2C digital humidity sensor is a fairly accurate and intelligent alternative to the much simpler Humidity and Temperature Sensor - SHT15 Breakout It has a typical accuracy of ±4% with an operating range that's optimized from 10% to 80% RH. Operation outside this range is still possible - just the accuracy might drop a bit. The temperature output has a typical accuracy of ±0.2°C from -20~85°C.
 
The HDC1080 sensor chip has 2 address-select pins, so you can have up to 4 shared on a single I2C bus. It's also 3-5V power and logic safe so you don't need any level shifters or regulators to use with a 5V or 3V microcontroller.
 
Please note: TI has indicated that there's a 'settling' effect for the humidity and that you will need to re-hydrate the sensor once you receive it. To rehydrate it, place it in a location with 85% humidity for 24 hours or 60% humidity for 10 days.
 
The HDC1080 is a digital humidity sensor with integrated temperature sensor that provides excellent measurement accuracy at very low power. The HDC1080 operates over a wide supply range, and is a low cost, low power alternative to competitive solutions in a wide range of common applications. The humidity and temperature sensors are factory calibrated.
 
Features:
 
Relative Humidity Accuracy ±2% (typical)
Temperature Accuracy ±0.2°C (typical)
Excellent Stability at High Humidity
14 Bit Measurement Resolution
100 nA Sleep Mode Current
 
Power Pins:
 
Vin - this is the power pin. Unlike many sensors, this chip can be powered by 3-5 VDC, so there is no voltage regulator on board. Simply power the board with the same power as the logic level of your microcontroller - e.g. for a 5V micro like Arduino, use 5V. For a 3V ARM processor, use 3V
GND - common ground for power and logic
I2C Logic pins:
SCL - I2C clock pin, connect to your microcontrollers I2C clock line. 3-5V logic OK
SDA - I2C data pin, connect to your microcontrollers I2C data line. 3-5V logic OK
 
Optional Pins:
 
These are pins you don't need to connect to unless you want to!
RDY - This is the interrupt/'ready' pin from the HDC100x. The chip has some capability to 'alert' you when data is ready to be read from the sensor. We don't use this pin in our library but it's available if you need it! It is open collector so you need to use a pull-up resistor if you want to read signal from this pin.
A0 A1 - These are the address select pins. Since you can only have one device with a given address on an i2c bus, there must be a way to adjust the address if you want to put more than one HDC100X on a shared i2c bus. The A0/A1 pins set the bottom 2 bits of the i2c address. There are pull-down resistors on the board so connect them to Vin to set the bits to '1'. They are read on power up, so de-power and re-power to reset the address
Si7021 humidity and temperature sensor
Description:
 
The main chip of this item is GY-213V-HTU21D 
The HTU21D is a low-cost, easy to use, highly accurate, digital humidity and temperature sensor. 
This sensor is ideal for environmental sensing and data logging and perfect for a weather stations or humidor control systems. All you need is two lines for I2C communication and you'll have relative humidity readings and very accurate temperature readings as a bonus!
There are only four pins that need to be hooked up in order to startusing this sensor in a project. 
One for VCC, one for GND, and two data lines for I2C communication. This breakout board has built in 4.7k pull up resistors for I2C communications.If you're hooking up multiple I2C devices on the same bus, you may want to disable these resistors.Dimensions: 0.6 x 0.6"
 
 
SHT20 Temperature Humidity Sensor Module 
Technical Parameters:
 
Supply voltage: 1.5V-3.6V
Humidity measuring range: 0-100% RH
Temperature range: -40 °-105°
Maximum power consumption: 2.7uW 
Communication: I2C
Humidity accuracy range:10% RH to 95% RH
Humidity Hysteresis: ±1% RH
Measurement time: 50ms
The annual shift: -0.5% RH / year
10. Response time: 5s
HTU20D T: /-0.3°
RH: /- 4% RH
HTU21D T: /-0.3°
RH: /- 2% RH
Storage temperature: -40° ~ 125°
Working humidity range: 0-100% RH
Working temperature range: -40° ~ 105°

Descritipion:
The main chip is GY-213V-HDC1080(Can use SHT21 HTU21D SI7021 chip to made the same sensor)
This I2C digital humidity sensor is a fairly accurate and intelligent alternative to the much simpler Humidity and Temperature Sensor - SHT15 Breakout It has a typical accuracy of ±4% with an operating range that's optimized from 10% to 80% RH. Operation outside this range is still possible - just the accuracy might drop a bit. The temperature output has a typical accuracy of ±0.2°C from -20~85°C.
 
The HDC1080 sensor chip has 2 address-select pins, so you can have up to 4 shared on a single I2C bus. It's also 3-5V power and logic safe so you don't need any level shifters or regulators to use with a 5V or 3V microcontroller.
 
Please note: TI has indicated that there's a 'settling' effect for the humidity and that you will need to re-hydrate the sensor once you receive it. To rehydrate it, place it in a location with 85% humidity for 24 hours or 60% humidity for 10 days.
 
The HDC1080 is a digital humidity sensor with integrated temperature sensor that provides excellent measurement accuracy at very low power. The HDC1080 operates over a wide supply range, and is a low cost, low power alternative to competitive solutions in a wide range of common applications. The humidity and temperature sensors are factory calibrated.
 
Features:
 
Relative Humidity Accuracy ±2% (typical)
Temperature Accuracy ±0.2°C (typical)
Excellent Stability at High Humidity
14 Bit Measurement Resolution
100 nA Sleep Mode Current
 
Power Pins:
 
Vin - this is the power pin. Unlike many sensors, this chip can be powered by 3-5 VDC, so there is no voltage regulator on board. Simply power the board with the same power as the logic level of your microcontroller - e.g. for a 5V micro like Arduino, use 5V. For a 3V ARM processor, use 3V
GND - common ground for power and logic
I2C Logic pins:
SCL - I2C clock pin, connect to your microcontrollers I2C clock line. 3-5V logic OK
SDA - I2C data pin, connect to your microcontrollers I2C data line. 3-5V logic OK
 
Optional Pins:
 
These are pins you don't need to connect to unless you want to!
RDY - This is the interrupt/'ready' pin from the HDC100x. The chip has some capability to 'alert' you when data is ready to be read from the sensor. We don't use this pin in our library but it's available if you need it! It is open collector so you need to use a pull-up resistor if you want to read signal from this pin.
A0 A1 - These are the address select pins. Since you can only have one device with a given address on an i2c bus, there must be a way to adjust the address if you want to put more than one HDC100X on a shared i2c bus. The A0/A1 pins set the bottom 2 bits of the i2c address. There are pull-down resistors on the board so connect them to Vin to set the bits to '1'. They are read on power up, so de-power and re-power to reset the address
Si7021 humidity and temperature sensor
Description:
 
The main chip of this item is GY-213V-HTU21D 
The HTU21D is a low-cost, easy to use, highly accurate, digital humidity and temperature sensor. 
This sensor is ideal for environmental sensing and data logging and perfect for a weather stations or humidor control systems. All you need is two lines for I2C communication and you'll have relative humidity readings and very accurate temperature readings as a bonus!
There are only four pins that need to be hooked up in order to startusing this sensor in a project. 
One for VCC, one for GND, and two data lines for I2C communication. This breakout board has built in 4.7k pull up resistors for I2C communications.If you're hooking up multiple I2C devices on the same bus, you may want to disable these resistors.Dimensions: 0.6 x 0.6"
 
 
SHT20 Temperature Humidity Sensor Module 
Technical Parameters:
 
Supply voltage: 1.5V-3.6V
Humidity measuring range: 0-100% RH
Temperature range: -40 °-105°
Maximum power consumption: 2.7uW 
Communication: I2C
Humidity accuracy range:10% RH to 95% RH
Humidity Hysteresis: ±1% RH
Measurement time: 50ms
The annual shift: -0.5% RH / year
10. Response time: 5s
HTU20D T: /-0.3°
RH: /- 4% RH
HTU21D T: /-0.3°
RH: /- 2% RH
Storage temperature: -40° ~ 125°
Working humidity range: 0-100% RH
Working temperature range: -40° ~ 105°

Description:
 
 
Sensiron Temperature/Humidity sensors are some of the finest & highest-accuracy devices you can get. And, finally we have some that have a true I2C interface for easy reading. The SHT31-D sensor has an excellent ±2% relative humidity and ±0.3°C accuracy for most uses.
 
Unlike earlier SHT sensors, this sensor has a true I2C interface, and (bonus!) even with two address options. It also is 3V or 5V compliant, so you can power and communicate with it using just about any microcontroller or microcomputer.
 
Such a lovely chip - so we spun up a breakout board with the SHT31-D and some supporting circuitry such as pullup resistors and capacitors. Each order comes with one fully assembled and tested PCB breakout and a small piece of header. You'll need to solder the header onto the PCB but it's fairly easy and takes only a few minutes even for a beginner.
 
 
 
Power Pins:
 
 
Vin - this is the power pin. The chip can use 2.5-5VDC for power. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V micro like for Arduino, use 5V. For a 3.3V controller like a Raspbery Pi, connect to 3.3V
GND - common ground for power and logic
 
 
I2C Logic pins:
 
SCL - I2C clock pin, connect to your microcontrollers I2C clock line. This pin has a 10K pullup resistor to Vin
SDA - I2C data pin, connect to your microcontrollers I2C data line. This pin has a 10K pullup resistor to Vin
 
 
Other Pins:
 
ADR - This is the I2C address selection pin. This pin has a 10K pull down resistor to make the default I2C address 0x44. You can tie this pin to Vin to make the address 0x45
RST - Hardware reset pint. Has a 10K pullup on it to make the chip active by default. Connect to ground to do a hardware reset!
ALR - Alert/Interrupt output. You can set up the sensor to alert you when an event has occured. Check the datasheet for how you can set up the alerts
 
 
 
Package Included:
 
 
10 X Sensiron SHT31-D Temperature Humidity Sensor

​Descriptions:
 
 
The VL53L0X from ST Microelectronics is a time-of-flight ranging system integrated into a compact module. This board is a carrier for the VL53L0X, so we recommend careful reading of the VL53L0X datasheet (1MB pdf) before using this product. 
The VL53L0 uses ST's FlightSense technology to precisely measure how long it takes for emitted pulses of infrared laser light to reach the nearest object and be reflected back to a detector, so it can be considered a tiny, self-contained lidar system. This time-of-flight (TOF) measurement enables it to accurately determine the absolute distance to a target without the object's reflectance greatly influencing the measurement. The sensor can report distances of up to 2 m (6.6 ft) with 1 mm resolution, but its effective range and accuracy (noise) depend heavily on ambient conditions and target characteristics like reflectance and size, as well as the sensor configuration. (The sensor's accuracy is specified to range from ±3% at best to over ±10% in less optimal conditions.) 
Ranging measurements are available through the sensor's I⊃2;C (TWI) interface, which is also used to configure sensor settings, and the sensor provides two additional pins: a shutdown input and an interrupt output. 
The VL53L0X is a great IC, but its small, leadless, LGA package makes it difficult for the typical student or hobbyist to use. It also operates at a recommended voltage of 2.8 V, which can make interfacing difficult for microcontrollers operating at 3.3 V or 5 V. Our breakout board addresses these issues, making it easier to get started using the sensor, while keeping the overall size as small as possible. 
  
PIN     Description 
VDD  Regulated 2.8 V output. Almost 150 mA is available to power external components. (If you want to bypass the internal regulator, you can instead use this pin as a 2.8 V input with VIN disconnected.)
 
VIN  This is the main 2.6 V to 5.5 V power supply connection. The SCL and SDA level shifters pull the I⊃2;C lines high to this level.
 
GND  The ground (0 V) connection for your power supply. Your I⊃2;C control source must also share a common ground with this board.
 
SDA    Level-shifted I⊃2;C data line: HIGH is VIN, LOW is 0 V
 
SCL      Level-shifted I⊃2;C clock line: HIGH is VIN, LOW is 0 V
 
XSHUT    This pin is an active-low shutdown input; the board pulls it up to VDD to enable the sensor by default. Driving this pin low puts the sensor into hardware standby. This input is not level-shifted. 
 
 
 
Package includes : 
 
 
 10x GY-VL53L0XV2V L53L0X Time-of-Flight Distance Sensor

Descirption:
 
 
This module is a plant watering alarm - as simple as that. You put it into the soil near a plant and it emits a tiny chirp when the soil is dry, reminding you to water the plant. Chirp uses capacitive humidity sensing as opposed to resistive humidity sensing, this means, it does not make an electric contact with the soil, avoiding electrode corrosion and soil electrolysis and resulting in better accuracy and longer battery life.
 
Special care has been taken not to make it yet another source of annoyance - Chirp will be silent when it's dark and will restrict itself from making too much noise.
 
The alarm level can be set for each plant individually. As water is consumed by the plant, Chirp will detect the low moisture level and will start to emit rare short chirps. As more water evaporates, Chirp will increase the alarm rate. Chirp can detect if it's day or night by measuring the amount of ambient light and will not make noise when it's dark.
 
1.Size:140*15mm
 
2.Work voltage:3V
 
 
Package Included:
 
  1 x CJMCU Plant Watering Alarm Alerter Humidity Moisture Sensor Module Soil Sensor

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

Product introduction: The VL6180 is a time-of-flight ranging sensor. The sensor contains a very small laser source and a matching sensor. The VL6180X can detect the "time of flight" or the time required for the laser to recover the sensor to calculate the distance. Unlike most distance sensors that rely on reflected light intensity or angle of reflection to determine the distance, the VL6180 uses an accurate clock to measure the time it takes for light to bounce off the surface, since it uses a very narrow source, which is different from ultrasonic sonar. Unlike traditional infrared distance sensors, you can't tell if an object is close because there is no linear problem or "dual imaging." Therefore, the VL6180X is more accurate. The VL6180 module is recommended to handle distances from 5mm to 100mm. Due to its small size, the sensor module is easy to use in any robot or interactive project. You can use it with any 3-5V power supply or logic microcontroller. Product Features 1. Integrated intelligent optical module, which can be used for proximity sensing, ranging and other functions; 2. Fast and accurate distance measurement. Measure the absolute range from 0 to 100 mm or more. Based on object-independent self-illuminating beam reflection measurements, measurements over 100 mm can be used in some extremely desirable target reflectances and environments, but are not guaranteed; 3. I2C interface for device control and data, two programmable GPIOs.

 
Conversion can use a few chips is 1.8 V, such as winbond w25q64, macro mx25u1635 flourishing, mx25u6435 etc to burn written in 3.3 V programmer for conversion. These chips are normally used for apple computer motherboard.
 
Applicable as main 1.8 V chip:
winbond
W25q10ew w25q20ew, w25q20bw w25q40ew, w25q40bw, w25q80ew, w25q80bw, w25q16dw, w25q16fw, w25q32dw, w25q32fw, w25q64dw, w25q64fw, w25f128fw
In the macro
Mx25u5121e mx25r512f, mx25u1001e mx25r1035f, mx25u2033e, mx25r2035f, mx25u4035,
Mx25u4033e mx25u4032e, mx25r4035f mx25u8035, mx25u8035e, mx25u8033e, mx25u8032e,
Mx25r8035f mx25u1635e, mx25v1635f mx25u1635f, mx25r1635f, mx25u3235e, mx25u3235f,
Mx25r3235f mx25u6473f, mx25u6435f mx25r6435f, mx25u12873f, mx25u12835f,
Mx25u25635f mx25u51245g, mx25um51245g mx66u51235f
Such as...
​
Conversion can use a few chips is 1.8 V, such as winbond w25q64, macro mx25u1635 flourishing, mx25u6435 etc to burn written in 3.3 V programmer for conversion. These chips are normally used for apple computer motherboard.
 
Applicable as main 1.8 V chip:
winbond
W25q10ew w25q20ew, w25q20bw w25q40ew, w25q40bw, w25q80ew, w25q80bw, w25q16dw, w25q16fw, w25q32dw, w25q32fw, w25q64dw, w25q64fw, w25f128fw
In the macro
Mx25u5121e mx25r512f, mx25u1001e mx25r1035f, mx25u2033e, mx25r2035f, mx25u4035,
Mx25u4033e mx25u4032e, mx25r4035f mx25u8035, mx25u8035e, mx25u8033e, mx25u8032e,
Mx25r8035f mx25u1635e, mx25v1635f mx25u1635f, mx25r1635f, mx25u3235e, mx25u3235f,
Mx25r3235f mx25u6473f, mx25u6435f mx25r6435f, mx25u12873f, mx25u12835f,
Mx25u25635f mx25u51245g, mx25um51245g mx66u51235f
Such as...

150W Boost Converter DC-DC 10-32V to 12-35V Step Up Voltage Charger Module
 
 
 
 
 
Description:
 
Module Properties: non-isolated step-up module (BOOST)
65 * 56.5 * 23 (length * width * high) (mm)
Input voltage :10-32V
Output voltage: 12-35V (adjustable)
Output Current: 6A (MAX)
Input Current: 10A (MAX) (Please enhance heat dissipation if more than 10A)
Output power: natural cooling 100W (MAX), enhance heat dissipation 150W (MAX)
Easy to drive 65W 90W dual-core notebook.
Use a 12V battery drive 19V 3.42A notebook, the module temperature about 45°c
Conversion efficiency: 94% (measured at Input 16V, output 19V 2.5A)
Output Ripple: 2% (MAX) 20M-bandwidth
Operating Temperature: Industrial (-40°c to 85°c) (ambient temperature exceeds 40°c, lower power use, or to enhance heat dissipation)
Full load temperature rise: 45°c
No-load current: 25mA typical
Voltage regulation: ± 0.5%
Dynamic response speed: 5% 200uS
Short circuit protection: None (Please Install fuses and protection circuits at Input port.)
Input Reverse Polarity Protection: None (Please Series diode at the input port.)Some Applications:
1. DIY an output adjustable vehicle power supply, connect the 12V input, and output could be 14-35V(adjustable freely), However, the output voltage can not be less than the input voltage.
2. Car laptop power supply: connected to 12V power supply, output voltage regulation as your notebook need.
Package Included:

Specification:
Note:
1. \"LIGHT\" linked with GND, the backlight to be lit.
2. Need you to compress the screen and PCB tighter, might got loose after the delivery.
3 Use a 3.3V controller, otherwise the display could be quite vague.
LCD5110 Module:
Power supply voltage:2.7V-3.3V,5V is OK,but part of the screen becomes black when tested?
Data interface level:2.7-5V?
Backlight power supply voltage:highest 3.3V?
Module size:43.6mm x 43.1mm(width X height)?
Installation diameter:2mm?
Backlight:blue
Document for Download:Data
1.RST--------- reset?
2.CE------------chip selection?
3.DC-----------data/commands choice?
4.DIN-----------serial data line?
5.CLK------------serial Clock Spee
6.3.3V------------VCC?
7.LIGHT--------- backlight control terminal?
8.GND-----------power negative
Features:
84 X 84 dot matrix LCD,can show 4 lines of characters
Use serial interface communicate with the master processor,the number of interface signal line reduced greatly, only 8 signal lines including power and GND.Support different types of MCU,such as the SPI,MCS51 serial mode 0 of AVR.Transfer rate up to 4Mbps,can full speed write display data without waiting time.
Can use the conductive glue to connect the module with the printed board,without connecting cable.The metal hooks on the module can fix the module on the printed board,which is very easy to install and replace.
LCD controller/driver chip has been bound to LCD chip,the volume of LCD is small
Low power supply,the working current in normal situation is lower than 200μA,and has power-down mode

The EasyDriver is a simple to use stepper motor driver,
compatible with anything that can output a digital 0 to 5V pulse
(or 0 to 3.3V pulse if you solder SJ2 closed on the EasyDriver).
EasyDriver requires a 7V to 30V supply to power the motor and can power any voltage of stepper motor.
The EasyDriver has an on board voltage regulator for the digital interface that can be set to 5V or 3.3V.
Connect a 4-wire stepper motor and a microcontroller and you\'ve got precision motor control!
EasyDriver drives bi-polar motors, and motors wired as bi-polar. I.e. 4,6, or 8 wire stepper motors.
On this version (v4.4) we fixed the silk error on the min/max adjustment.
MS1 and MS2 pins broken out to change microstepping resolution to full, half, quarter and eighth steps (defaults to eighth)
Compatible with 4, 6, and 8 wire stepper motors of any voltage
Adjustable current control from 150mA/phase to 750mA/phase
Power supply range from 7V to 30V. The higher the voltage, the higher the torque at high speeds
This is the newest version of EasyDriver V4 co-designed withBrian Schmalz.
It provides much more flexibility and control over your stepper motor, when compared to older versions.
The microstep select (MS1 and MS2) pins of the A3967 are broken out allowing adjustments to the microstepping resolution.
The sleep and enable pins are also broken out for further control.
Note: Do not connect or disconnect a motor while the driver is energized. This will cause permanent damage to the A3967 IC.
Specifications:
Main color:Red
Board size:47 x 20mm
Pin header size:51 x11mm
Net weight:7g
 
10x A3967 board
10x Pin Header

 
PWM to Voltage Module
(PWM to Voltage Converter Module 0% -100% to 0-10V for PLC MCU Digital to Analog Signal PWM Adjustabl Converter Power Module) 1. Description: The PWM transfer voltage module LC-LM358-PWM2V converts the PWM digital signals into 0 to 10V analog signals. It can be used as signal interface switching for PLC or other industrial control boards. The output voltage is regulated by adjusting the duty ratio of the PWM. The modules are small in size and easy to use in different places. 2. Features: 1>. MCU embedded technology 2>. Easy to operate, fine tuned by potentiometer 3>. Select the PWM signal input level range through short-circuit 4>. The module is smaller, easy to carry and use 3. Parameter: 1>. Work Voltage:DC 12V-30V; (> 100MA) 2>. PWM Receiver Frequency:1KHZ-3KHZ 3>. PWM signal input level range: The peak of 4.5V to 10V level. The short cap install in ‘5V'. This level is used for normal controller or 5V MCU The peak of 12V to 24V level, so inserted in 24V. The short cap install in ‘24V'. This level is used for normal PLC controller 4>. Conversion range:0% -100% PWM to 0-10V 5>. Allowable error:5% 4. Hardware Interface: VCC DC 12V-30V GND Ground PWM Positive of PWM input signal GND Negative of input signal VOUT Output Voltage 0-10V GND Output Voltage Ground 5. Operation instructions: After power on, without input signal, the output is 0V, so only input can output. The first time when the power is on, it is best to do a calibration debugging:Input a 50% duty ratio signal to PWM/GND and adjust the relative amplitude short cap. The frequency is 1KHZ-3KHZ, Measured VOUT and GND with a multimeter and it will display 5V. Adjust potentiometer to make sure display 5.00V on multimeter. This will calibrate your pulse signal to this module. When the frequency changes, the correspondences may be offset and need to be re calibrated. The output voltage can be adjusted by adjusting the duty ratio. The accuracy can be controlled by adjusting the potentiometer.

 DC 3V-6V bis 400kV 400000V Boost Step up Power Module High Voltage Generator

Descriptions:
1. The USB sound card playing function (with USB connection to the computer into a USB sound card mode, after the first, not plug into the model USB connection on the computer to boot priority into USB AUDIO mode) 
2. Bluetooth AUDIO playback function, Bluetooth phone, telephone voice, function, Bluetooth background (other models down your phone will automatically enter the voice, the pattern of cell phone hang up and then back to former mode
3. Have an U disk broadcast function (U disk inserted into the USB playback mode, after the first, no U disk online skip this mode)
4. Have the function of TF card playing (TF inserted into the TF card mode, after the first, no TF card online skip this mode)
5. The (English) voice prompt function (you can choose to buy Chinese and English version) each pattern priority from high to low: USB sound card = > Bluetooth USB = > TF card (USB sound card U disk TF card When detected not on-line automatic press mode key to skip the corresponding mode)
6. Music mode supports decoding format: MP3, WMA, WAV, FLAC
7. Support tracking the breakpoint; The volume off electricity save
 
Features:
1. Excellent durability and coexistence
2. Ensure the stability of the Bluetooth transmission through a variety of techniques 
3. Intuitive LED indicator
4. Voice prompt, convenient to use
5. Wireless transmission distance ≥ 10 m
6. Using the latest bluetooth 4.2 protocol, which is downward compatible with other versions
7. Typical applications: Home Bluetooth Speakers, Speaker Maintenance, Car player modified, Computer Speaker Upgrade, Bluetooth MP3 Decoder, etc.
 
Specifications:
Power Supply: 3.3-5.0V
Working Current: 35mA
Channel: Stereo
Bluetooth Version: 4.2
Working Frequency: 2400-2485MHz
Receiving Sensitivity: -85dBm
Size: 8x4cm/3.15x1.57"  2.3x1.5cm/0.91x0.59"
Quantity: 1 Set
 
Note: 
Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!

Scope: beginners, experimental equipment platform, interactive electronics, robotics.
 
Features: multi-function, easy to operate, have powerful drive library support and feature updates.
 
Disadvantages: I / O occupy more drive Quad motor case (relative I / O less version), a small power.
 
4-channel DC motor drives, stepper motor or 2 while driving two servos, support for the latest UNO Mega 2560
You can mix:
DC motor driver quad and two steering gear
Drive two DC motor and stepper motor all the way and two-way steering gear
Drive two stepper motors and two servos
 
Is a good entry-electronic production, with motor expansion board can be a good robot development platform. Here a motor can drive a variety of simple to a slightly complex projects full function expansion board.
This is a common DC motor drive module, 293D the chip small current DC motor driver chips. The pin is made of the Arduino compatible, but also facilitate enthusiasts based development.
 
* 2 5V servo motor (Servo) port coupled to the high-resolution high-precision timer - no jitter!
* Up to 4 bi-directional DC motor and 4-channel PWM speed (about 0.5% resolution)
* Up to 2 stepper motor control, single / double step control, staggered or micro-step rotation angle control.
* 4 H-bridge: the L293D chip to provide road and bridge .0.6 A (peak 1.2A) current and with a thermal power protection 4.5V to 36V.
* The pull-down resistors guarantee on the electric motor remains stopped.
* Large terminal terminals to make wiring easier (10 - 22AWG) and power.
* With a reset button.
* 2 large terminal external power terminals to ensure that logic and motor-driven power separation.
* Compatible with Mega, Diecimila, & Duemilanove.
* To provide a full range of spare parts available would like to do-it-yourself enthusiasts DIY.
* Download the easy-to-use software libraries rapid project development
 
​
 

CH341A 24 25 Series EEPROM Flash BIOS USB Programmer with Software & Driver
Product Details:
USB Programmer
Condition: New
Support 24EEPROM and 25 SPI flash 8pin/16pin chip
USB to TTL port, can getroot online
With CH341A chip
Recognize 25 series chip automatically
And support download STC series procedure of singlechip
With 24/25 status indicator lamp
SPI pin to support expanding the utility
Color is shown as pictures
PLS NOTE that due to lighting effects, monitor's brightness/ contrass settings ect, there could be some slight differences in the color tone of the pictures and the actual item! 
Package Included:
1 x USB Programmer
1 x Pinboard
 

2.4G 1100 Meters Long Distance  NRF24L01 PA LNA Wireless Module with Antenna
 
Product Description:
 
Voltage: 3-3.6V
Max output power:  20 dBm
Working current in transmit mode: 115mA
Working current in receiver mode: 45mA
Current in    mode: 4.2uA
Operating temperature: -20-70 degree
Receiver sensitivity: -92dBm in 2Mbps mode, -95dBm in 1Mbps mode, -104dBm in 250kbps mode
PA growth: 20dB
LAN growth: 10dB
LAN noise figure: 2.6dB
Antenna growth: 2dBI
2M rate: 520m
 
Package Include:
 
10 x NRF24L01 PA LNA Wireless Module
10 x Antenna  
 

 Color of the PCB would be black or purple randomly.  
 
The INA3221 is a three-channel, high-side current and bus voltage monitor with an I2C- and SMBUScompatible interface. The INA3221 monitors both shunt voltage drops and bus supply voltages, in addition to having programmable conversion times and averaging modes for these signals. The INA3221 offers both critical and warning alerts to detect multiple programmable out-of-range conditions for each channel. The INA3221 senses current on buses that can vary from 0 V to 26 V. The device is powered from a single 2.7-V to 5.5-V supply, and draws 350 uA (typ)of supply current. The INA3221 is specified over the operating temperature range of –40°C to 125°C. The I2C- and SMBUS-compatible interface features four programmable addresses.
 

This module is mainly controlled by esp8266-01 / esp-01s, and DHT11 is the temperature and humidity sensor.
The temperature and humidity of ESP8266 are uploaded to the server.
Support 3.7 v-12v DC supply (3.7 v lithium battery).
It can be used as a temperature and humidity collection node for smart home or IOT projects.
 
Data download: http://pan.baidu.com/s/1pLBL8b5
 
Features:
 
* main control: esp-01 / esp-01s (this module does not include esp-01 / esp-01s)
 
* temperature and humidity sensor: DHT11
 
* working voltage: DC 3.7 v-12v (support for 3.7V lithium battery)
 
* measurement range: 20-90% RH 0 to 50 °
 
* accuracy of measurement: temperature: plus or minus 2 ° humidity / - 5% RH

This module is mainly controlled by esp8266-01 / esp-01s, and DHT11 is the temperature and humidity sensor.
The temperature and humidity of ESP8266 are uploaded to the server.
Support 3.7 v-12v DC supply (3.7 v lithium battery).
It can be used as a temperature and humidity collection node for smart home or IOT projects.
 
Data download: http://pan.baidu.com/s/1pLBL8b5
 
Features:
 
* main control: esp-01 / esp-01s (this module does not include esp-01 / esp-01s)
 
* temperature and humidity sensor: DHT11
 
* working voltage: DC 3.7 v-12v (support for 3.7V lithium battery)
 
* measurement range: 20-90% RH 0 to 50 °
 
* accuracy of measurement: temperature: plus or minus 2 ° humidity / - 5% RH

This module is mainly controlled by esp8266-01 / esp-01s, and DHT11 is the temperature and humidity sensor.
The temperature and humidity of ESP8266 are uploaded to the server.
Support 3.7 v-12v DC supply (3.7 v lithium battery).
It can be used as a temperature and humidity collection node for smart home or IOT projects.
 
Data download: http://pan.baidu.com/s/1pLBL8b5
 
Features:
 
* main control: esp-01 / esp-01s (this module does not include esp-01 / esp-01s)
 
* temperature and humidity sensor: DHT11
 
* working voltage: DC 3.7 v-12v (support for 3.7V lithium battery)
 
* measurement range: 20-90% RH 0 to 50 °
 
* accuracy of measurement: temperature: plus or minus 2 ° humidity / - 5% RH