Elektronikus összetevők

Features
Two selectable differential input channels
On-chip active low noise PGA with selectable gain of 3264 and 128
On-chip power supply regulator for load-cell and ADC analog power supply
On-chip oscillator requiring no external component with optional external crystal
On-chip power-on-reset
Simple digital control and serial interface: pin-driven controlsno programming needed
Selectable 10SPS or 80SPS output data rate
Simultaneous 50 and 60Hz supply rejection
Current consumption including on-chip analog power supply regulator: normal operation < 1.5mApower down < 1uA
Operation supply voltage range: 2.6 ~ 5.5V
Operating Temperature Range:-20 degree ~ 85 degree
 
Connection:
Red to E
Black to E-
Green to A
White to A-

Description:
 
 
PAJ7620U2 gesture recognition sensor. It can recognize 9 gestures including move up, move down, move left, move right, move forward, move backward,circle-clockwise, circle-counter clockwise, and wave. These gestures information can be simply accessed via the I2C bus. The PAJ7620U2 also offers built-in proximity detection for the purpose of sensing object approaching or departing. The PAJ7620U2 is designed with great flexibility in power-saving mechanism.The PAJ7620U2 is designed to operate from 2.8V to 3.3V over -40°C to 85°C and the pull-up voltage for the I2C bus and interrupt line is from 1.8V to 3.3V.
 
 
Feature
 
 
Typical supply voltage is 2.8V to 3.3V and I/O voltage is 1.8V~3.3V
Nine gesture recognition (Up / Down / Left / Right / Push / Pull / CW / CCW / Wave)
Gesture speed is 60°/s to 600°/s in Normal Mode and 60°/s to 1200°/s in Gaming Mode
Ambient light immunity: < 100k Lux
Built-in proximity detection
Flexible power saving scheme
I2C interface up to 400 kbit/s, Pull-up voltage from 1.8V to 3.3V
Ambient light noise cancellation
 
 
Application
 
PAD Phone
Tablet Personal Computer
Automobile Application
 
 
 

 
ProtoBoard Shield for D1 mini double sided perf board Compatible
 

 
AC 100V-240V Converter Adapter DC 9V 1A Power Supply EU Plug  DC 5.5mm x 2.1mm 1000mA for  UNO MEGA
Description:
100% Brand new 100V - 240V AC to DC charger Adapter
Input : 100V-240V 50/60Hz
Output : DC 9V 1A /1000mA
Out put adaptor : 5.5mm x 2.1mm
Dimension: 7.6 x 7.5 x 2.6 cm
Length of the cable: 90CM
the adapters Connector  inside positive  ( )outside  negative (-)
Power Supply with LED indicator
To provide 12 months warranty    
pack:1pcs Power Supply EU
 

 
 
2S Li-ion 18650 Lithium Battery Charger Protection Board 7.4V Overcurrent Overcharge / Overdischarge Protection 4A 2 Series BMS

emperature and humidity transmitter SHT20 sensor Modbus RS485
 
Product Description:
Product adopts industrial-grade chip, high-precision SHT20 temperature and humidity sensors, ensure the products with good reliability, high precision and interchangeability.
Adopt RS485 hardware interface (with the lightning protection design), the protocol layer compatible with standard industrial Modbus Rtu protocol.
This product integrating MODBUS protocol with ordinary, users can choose communication protocols, common agreement with automatic upload function(Connect the RS485 serial interface mode tool by automatically output temperature and humidity).
 
MODBUS PROTOCAL
Modbus Function Code:
0x03:Read keep register
0x04: Read input register
0x06:Write a single keep register
0x10:Write more keep registers
 
Modbus Frame format:
Master send format:
The responseformat of slave:
MODBUSCOMMAND
Master read temperature command frame(0x04):
The response data from slave:
Temperature value=0x131,converted to a decimal 305,the actual temperature value = 305 / 10 = 30.5°
Note: the temperature is signed hexadecimal number, temperature value = 0xFF33, converted to a decimal - 205, the actual temperature = -20.5 °;
 
Master read humidity command frame(0x04)
 
 
The response data from slave:
Humidity value = 0x222, converted to a decimal 546, actual humidity value = 546/10 = 54.6 % ;
Continuous read temperature and humidity command frame(0x04):
The response data from slave:
 
 
Read keep register(0x03):
Readdevice address from the slave:
The response data from slave:
 
Modify the contents of the registers(0x06):
Modify the slave address register:
Modify the slave address:0x08 = 8
 
The response data from slave(And send the same):
Continuously change keep registers(0x10):
 
Slave address :0x20 = 32
Baud rate :0x2580 = 9600
The response data from slave:

 
OV7670 image sensor, small size, low operating voltage, and provides all the features of the single-chip VGA camera and image processor. Through theSCCB bus control, you can output the entire frame, sub-sampled, take the window way affect the data resolution of 8 bits. VGA image of the product is up to 30 frames / sec. Users can fully control the image quality, data format and transmission mode. The process of image processing functions including gamma curves, white balance, saturation, chroma, and so can beprogrammed through the SCCB interface. OmmiVision image sensor applications unique sensor technology to improve image quality by reducing or eliminating the optical or electronic defect, such as fixed pattern noise, tail-blooming, clear and stable color image. 
High sensitivity for low-light applications 
Low voltage suitable for embedded applications 
Standard SCCB interface compatible with I2C interface 
 RawRGB to RGB (GRB4: 2:2, RGB565/555/444), YUV (4:2:2) and YCbCr (4:2:2)output format 
 support VGA, CIF, and from CIF to 40x30 the size 
 VarioPixel subsampling way 
eliminate light stripes, automatic black level calibration image quality control including color saturation, hue, gamma, sharpness ANTI_BLOOM
 ISP has eliminate noise and dead pixel compensation function 
support image scaling 
The lens is the loss of light compensation 
 50/60Hz detection 
the saturation automatically adjust ( UV adjustment) 
edge enhancement automatically adjust 
Noise Reduction automatically adjust 
key parameters 
photosensitive array 640X480 
IO voltage 2.5V to 3.0V ( internal LDO to core supplies ) the
power operation 60mW/15fpsVGAYUV
Sleep < 20 μ A
temperature operation from -30 ° C to 70 ° C 
0 ° C to 50 ° C
( 8 -bit) output format ? YUV/YCbCr4 RGB565/555/444 GRB4: 2:2: 2:2 Raw RGB Data
Optical size of 1/6 "
field of view angle of 25 ° 
maximum Zhen rate 30fps VGA
Sensitivity 1.3V / (Lux-sec)
signal to noise ratio of 46 dB
dynamic range of 52 dB
browsing mode progressive 
electronic exposure 
area of 3.6 μ mx 3.6 μ m
dark current 12 mV / s at 60 ° C

GY-63 MS5611 High-resolution Atmospheric Height Sensor Module IIC / SPI Communication
Description:
 
Chip built-in 24bit AD converter
Immersion Gold PCB, high quality, machine welding process to ensure quality
The use of chips: MS5611
Power supply :3-5v (internal low dropout regulator)
Communication modes: standard the IIC / SPI communication protocol
 
 
Package included:
1 xGY-63 MS5611Module
 
 
 
 
 
 
 
 
 

1.1 Tips (Very important) :
TXD: sending end, generally expressed as its own sending end, normal communication must be connected to the RXD of another device.
RXD: receiving end, generally expressed as their own receiving end, normal communication must be connected to the TXD of another device.
Normal communication when the TXD itself is always connected to the device RXD!
Self-absorption: Normal communication TXD RXD connect other devices, so if you want to receive their data, as the name implies, is receiving themselves to send data, is directly connected to the RXD TXD itself, that is, used to test whether the sending and receiving of normal itself, is the most simple test method is the fastest, when problems arise first do this test to determine whether the product failure. Also known as loop testing.
1.2 Level logic:
TTL level: usually the data is expressed in binary. It is specified that 5V is equivalent to logic "1" and 0V is equivalent to logic "0". It is called TTL signal system and positive logic
RS232 level: adopt -12V to -3V, equivalent to logic "0", 3V to 12V logic level, equivalent to logic "1", is negative logic
1.3 Product Features:
1, the core module uses HC-05 from the module, the output interface includes VCC,GND,TXD,RXD,KEY pin, Bluetooth connection status pin (STATE), the output is low if not connected, the output is high after connected
2. Led indicates the Bluetooth connection status. Quick blinking means no Bluetooth connection; slow blinking means AT mode; double blinking means Bluetooth is connected and the port is opened
The bottom plate is equipped with anti-reverse connection diode, with 3.3V LDO, the input voltage is 3.6-6V, the unpaired current is about 30mA, the paired current is about 10mA, the input voltage is prohibited to exceed 7V!
4, interface level 3.3V, can be directly connected to a variety of microcontroller (51, AVR, PIC, ARM, MSP430, etc.), 5V microcontroller can also be directly connected, without MAX232 can not go through MAX232!
5, open effective distance of 10 meters (power CLASS is CLASS 2), more than 10 meters is also possible, but the connection quality of this distance is not guaranteed
6. After pairing, when the full-duplex serial port is used, there is no need to know any Bluetooth protocol. It supports 8-bit data bit, 1-bit stop bit and parity check communication format, which is also the most commonly used communication format, and other formats are not supported.
7. You can enter the AT command mode by raising 34 feet to set parameters and query information
8, small size (3.57cm*1.52cm), factory SMT production, to ensure the quality of SMT. And set transparent heat shrinkable tube, dustproof and beautiful, and has a certain anti-static ability.
9. Switch to host or slave mode by using THE AT command, and connect to the specified device by using the AT command
10, support from 4800bps to 1382400bps between standard baud rate
1.4 Product Usage:
After pairing, the serial port can be used as a fixed baud rate serial port. Therefore, as long as the serial port device is in the communication format of "fixed baud rate, 8 data bits, no parity check", it can directly replace the original wired serial port without modifying the program. Such as data acquisition, intelligent car, serial printer, outdoor dot matrix strip screen control, etc.
Pair with computer: suitable for computer and device to communicate through bluetooth serial port, the use method is the same as serial port
Pairing with mobile phone: suitable for communication between mobile phone and device through Bluetooth serial port, the use method is the same as serial port
Pairing with Bluetooth host: it is suitable for two devices to communicate directly through Bluetooth serial port, such as between single chip microcomputer and single chip microcomputer, wired serial port and single chip microcomputer, etc. The use method is the same as serial port
Flexible use:
Baud rate conversion, because the receiving end and the sending end can choose their own baud rate, in the case of small data volume can be used as baud rate conversion equipment.
2.1 How to connect bluetooth module to computer (effective in slave mode)
Here is an example of pairing it with a Bluetooth computer:
First, power on the Bluetooth passthrough module, and then the LED flashes. Open "My Bluetooth Location" and click "Search for devices in the valid range".
The system searches for bluetooth devices with the default device name "linvor" (modified name if modified, such as "jiayuanelectron"), double click or right click and choose "add bluetooth device".
Enter the pairing password (default: 1234),
Click "Next". If the password is correct, the connection between the computer and the passthrough module will be established. If bluetooth serial port device has not been installed before, the system will automatically install the driver and generate a virtual serial port
Click Config, select the appropriate COM port,
I can only choose COM5 here, which is the serial port for computer operation after connection. For example, WHEN I open com5 here, the LED of Bluetooth module will change from quick flash to double flash. At this time, you only need to use bluetooth module as the serial port of fixed baud rate of computer, but it is wireless.
Tips:
1. The supply voltage must be 5V, not 3.3V
2. Do not connect the pin of the power cable to the data cable. Confirm it carefully before connecting the cable
3. The LED must enter the slow blinking mode before the AT command test
 
4. After each AT instruction is input, you must press enter to send it
5. If OK cannot be returned, swap RXD and TXD
6. Do not tear the heat shrinkable tube or weld it by yourself. Otherwise, the warranty and return and replacement service will be waived
 
 
7. The RXD and TXD on UNO cannot be used to connect bluetooth module for AT instruction test

1.1 Tips (Very important) :
TXD: sending end, generally expressed as its own sending end, normal communication must be connected to the RXD of another device.
RXD: receiving end, generally expressed as their own receiving end, normal communication must be connected to the TXD of another device.
Normal communication when the TXD itself is always connected to the device RXD!
Self-absorption: Normal communication TXD RXD connect other devices, so if you want to receive their data, as the name implies, is receiving themselves to send data, is directly connected to the RXD TXD itself, that is, used to test whether the sending and receiving of normal itself, is the most simple test method is the fastest, when problems arise first do this test to determine whether the product failure. Also known as loop testing.
1.2 Level logic:
TTL level: usually the data is expressed in binary. It is specified that 5V is equivalent to logic "1" and 0V is equivalent to logic "0". It is called TTL signal system and positive logic
RS232 level: adopt -12V to -3V, equivalent to logic "0", 3V to 12V logic level, equivalent to logic "1", is negative logic
1.3 Product Features:
1, the core module uses HC-05 from the module, the output interface includes VCC,GND,TXD,RXD,KEY pin, Bluetooth connection status pin (STATE), the output is low if not connected, the output is high after connected
2. Led indicates the Bluetooth connection status. Quick blinking means no Bluetooth connection; slow blinking means AT mode; double blinking means Bluetooth is connected and the port is opened
The bottom plate is equipped with anti-reverse connection diode, with 3.3V LDO, the input voltage is 3.6-6V, the unpaired current is about 30mA, the paired current is about 10mA, the input voltage is prohibited to exceed 7V!
4, interface level 3.3V, can be directly connected to a variety of microcontroller (51, AVR, PIC, ARM, MSP430, etc.), 5V microcontroller can also be directly connected, without MAX232 can not go through MAX232!
5, open effective distance of 10 meters (power CLASS is CLASS 2), more than 10 meters is also possible, but the connection quality of this distance is not guaranteed
6. After pairing, when the full-duplex serial port is used, there is no need to know any Bluetooth protocol. It supports 8-bit data bit, 1-bit stop bit and parity check communication format, which is also the most commonly used communication format, and other formats are not supported.
7. You can enter the AT command mode by raising 34 feet to set parameters and query information
8, small size (3.57cm*1.52cm), factory SMT production, to ensure the quality of SMT. And set transparent heat shrinkable tube, dustproof and beautiful, and has a certain anti-static ability.
9. Switch to host or slave mode by using THE AT command, and connect to the specified device by using the AT command
10, support from 4800bps to 1382400bps between standard baud rate
1.4 Product Usage:
After pairing, the serial port can be used as a fixed baud rate serial port. Therefore, as long as the serial port device is in the communication format of "fixed baud rate, 8 data bits, no parity check", it can directly replace the original wired serial port without modifying the program. Such as data acquisition, intelligent car, serial printer, outdoor dot matrix strip screen control, etc.
Pair with computer: suitable for computer and device to communicate through bluetooth serial port, the use method is the same as serial port
Pairing with mobile phone: suitable for communication between mobile phone and device through Bluetooth serial port, the use method is the same as serial port
Pairing with Bluetooth host: it is suitable for two devices to communicate directly through Bluetooth serial port, such as between single chip microcomputer and single chip microcomputer, wired serial port and single chip microcomputer, etc. The use method is the same as serial port
Flexible use:
Baud rate conversion, because the receiving end and the sending end can choose their own baud rate, in the case of small data volume can be used as baud rate conversion equipment.
2.1 How to connect bluetooth module to computer (effective in slave mode)
Here is an example of pairing it with a Bluetooth computer:
First, power on the Bluetooth passthrough module, and then the LED flashes. Open "My Bluetooth Location" and click "Search for devices in the valid range".
The system searches for bluetooth devices with the default device name "linvor" (modified name if modified, such as "jiayuanelectron"), double click or right click and choose "add bluetooth device".
Enter the pairing password (default: 1234),
Click "Next". If the password is correct, the connection between the computer and the passthrough module will be established. If bluetooth serial port device has not been installed before, the system will automatically install the driver and generate a virtual serial port
Click Config, select the appropriate COM port,
I can only choose COM5 here, which is the serial port for computer operation after connection. For example, WHEN I open com5 here, the LED of Bluetooth module will change from quick flash to double flash. At this time, you only need to use bluetooth module as the serial port of fixed baud rate of computer, but it is wireless.
Tips:
1. The supply voltage must be 5V, not 3.3V
2. Do not connect the pin of the power cable to the data cable. Confirm it carefully before connecting the cable
3. The LED must enter the slow blinking mode before the AT command test
 
4. After each AT instruction is input, you must press enter to send it
5. If OK cannot be returned, swap RXD and TXD
6. Do not tear the heat shrinkable tube or weld it by yourself. Otherwise, the warranty and return and replacement service will be waived
 
 
7. The RXD and TXD on UNO cannot be used to connect bluetooth module for AT instruction test

1.1 Tips (Very important) :
TXD: sending end, generally expressed as its own sending end, normal communication must be connected to the RXD of another device.
RXD: receiving end, generally expressed as their own receiving end, normal communication must be connected to the TXD of another device.
Normal communication when the TXD itself is always connected to the device RXD!
Self-absorption: Normal communication TXD RXD connect other devices, so if you want to receive their data, as the name implies, is receiving themselves to send data, is directly connected to the RXD TXD itself, that is, used to test whether the sending and receiving of normal itself, is the most simple test method is the fastest, when problems arise first do this test to determine whether the product failure. Also known as loop testing.
1.2 Level logic:
TTL level: usually the data is expressed in binary. It is specified that 5V is equivalent to logic "1" and 0V is equivalent to logic "0". It is called TTL signal system and positive logic
RS232 level: adopt -12V to -3V, equivalent to logic "0", 3V to 12V logic level, equivalent to logic "1", is negative logic
1.3 Product Features:
1, the core module uses HC-05 from the module, the output interface includes VCC,GND,TXD,RXD,KEY pin, Bluetooth connection status pin (STATE), the output is low if not connected, the output is high after connected
2. Led indicates the Bluetooth connection status. Quick blinking means no Bluetooth connection; slow blinking means AT mode; double blinking means Bluetooth is connected and the port is opened
The bottom plate is equipped with anti-reverse connection diode, with 3.3V LDO, the input voltage is 3.6-6V, the unpaired current is about 30mA, the paired current is about 10mA, the input voltage is prohibited to exceed 7V!
4, interface level 3.3V, can be directly connected to a variety of microcontroller (51, AVR, PIC, ARM, MSP430, etc.), 5V microcontroller can also be directly connected, without MAX232 can not go through MAX232!
5, open effective distance of 10 meters (power CLASS is CLASS 2), more than 10 meters is also possible, but the connection quality of this distance is not guaranteed
6. After pairing, when the full-duplex serial port is used, there is no need to know any Bluetooth protocol. It supports 8-bit data bit, 1-bit stop bit and parity check communication format, which is also the most commonly used communication format, and other formats are not supported.
7. You can enter the AT command mode by raising 34 feet to set parameters and query information
8, small size (3.57cm*1.52cm), factory SMT production, to ensure the quality of SMT. And set transparent heat shrinkable tube, dustproof and beautiful, and has a certain anti-static ability.
9. Switch to host or slave mode by using THE AT command, and connect to the specified device by using the AT command
10, support from 4800bps to 1382400bps between standard baud rate
1.4 Product Usage:
After pairing, the serial port can be used as a fixed baud rate serial port. Therefore, as long as the serial port device is in the communication format of "fixed baud rate, 8 data bits, no parity check", it can directly replace the original wired serial port without modifying the program. Such as data acquisition, intelligent car, serial printer, outdoor dot matrix strip screen control, etc.
Pair with computer: suitable for computer and device to communicate through bluetooth serial port, the use method is the same as serial port
Pairing with mobile phone: suitable for communication between mobile phone and device through Bluetooth serial port, the use method is the same as serial port
Pairing with Bluetooth host: it is suitable for two devices to communicate directly through Bluetooth serial port, such as between single chip microcomputer and single chip microcomputer, wired serial port and single chip microcomputer, etc. The use method is the same as serial port
Flexible use:
Baud rate conversion, because the receiving end and the sending end can choose their own baud rate, in the case of small data volume can be used as baud rate conversion equipment.
2.1 How to connect bluetooth module to computer (effective in slave mode)
Here is an example of pairing it with a Bluetooth computer:
First, power on the Bluetooth passthrough module, and then the LED flashes. Open "My Bluetooth Location" and click "Search for devices in the valid range".
The system searches for bluetooth devices with the default device name "linvor" (modified name if modified, such as "jiayuanelectron"), double click or right click and choose "add bluetooth device".
Enter the pairing password (default: 1234),
Click "Next". If the password is correct, the connection between the computer and the passthrough module will be established. If bluetooth serial port device has not been installed before, the system will automatically install the driver and generate a virtual serial port
Click Config, select the appropriate COM port,
I can only choose COM5 here, which is the serial port for computer operation after connection. For example, WHEN I open com5 here, the LED of Bluetooth module will change from quick flash to double flash. At this time, you only need to use bluetooth module as the serial port of fixed baud rate of computer, but it is wireless.
Tips:
1. The supply voltage must be 5V, not 3.3V
2. Do not connect the pin of the power cable to the data cable. Confirm it carefully before connecting the cable
3. The LED must enter the slow blinking mode before the AT command test
 
4. After each AT instruction is input, you must press enter to send it
5. If OK cannot be returned, swap RXD and TXD
6. Do not tear the heat shrinkable tube or weld it by yourself. Otherwise, the warranty and return and replacement service will be waived
 
 
7. The RXD and TXD on UNO cannot be used to connect bluetooth module for AT instruction test

1.1 Tips (Very important) :
TXD: sending end, generally expressed as its own sending end, normal communication must be connected to the RXD of another device.
RXD: receiving end, generally expressed as their own receiving end, normal communication must be connected to the TXD of another device.
Normal communication when the TXD itself is always connected to the device RXD!
Self-absorption: Normal communication TXD RXD connect other devices, so if you want to receive their data, as the name implies, is receiving themselves to send data, is directly connected to the RXD TXD itself, that is, used to test whether the sending and receiving of normal itself, is the most simple test method is the fastest, when problems arise first do this test to determine whether the product failure. Also known as loop testing.
1.2 Level logic:
TTL level: usually the data is expressed in binary. It is specified that 5V is equivalent to logic "1" and 0V is equivalent to logic "0". It is called TTL signal system and positive logic
RS232 level: adopt -12V to -3V, equivalent to logic "0", 3V to 12V logic level, equivalent to logic "1", is negative logic
1.3 Product Features:
1, the core module uses HC-05 from the module, the output interface includes VCC,GND,TXD,RXD,KEY pin, Bluetooth connection status pin (STATE), the output is low if not connected, the output is high after connected
2. Led indicates the Bluetooth connection status. Quick blinking means no Bluetooth connection; slow blinking means AT mode; double blinking means Bluetooth is connected and the port is opened
The bottom plate is equipped with anti-reverse connection diode, with 3.3V LDO, the input voltage is 3.6-6V, the unpaired current is about 30mA, the paired current is about 10mA, the input voltage is prohibited to exceed 7V!
4, interface level 3.3V, can be directly connected to a variety of microcontroller (51, AVR, PIC, ARM, MSP430, etc.), 5V microcontroller can also be directly connected, without MAX232 can not go through MAX232!
5, open effective distance of 10 meters (power CLASS is CLASS 2), more than 10 meters is also possible, but the connection quality of this distance is not guaranteed
6. After pairing, when the full-duplex serial port is used, there is no need to know any Bluetooth protocol. It supports 8-bit data bit, 1-bit stop bit and parity check communication format, which is also the most commonly used communication format, and other formats are not supported.
7. You can enter the AT command mode by raising 34 feet to set parameters and query information
8, small size (3.57cm*1.52cm), factory SMT production, to ensure the quality of SMT. And set transparent heat shrinkable tube, dustproof and beautiful, and has a certain anti-static ability.
9. Switch to host or slave mode by using THE AT command, and connect to the specified device by using the AT command
10, support from 4800bps to 1382400bps between standard baud rate
1.4 Product Usage:
After pairing, the serial port can be used as a fixed baud rate serial port. Therefore, as long as the serial port device is in the communication format of "fixed baud rate, 8 data bits, no parity check", it can directly replace the original wired serial port without modifying the program. Such as data acquisition, intelligent car, serial printer, outdoor dot matrix strip screen control, etc.
Pair with computer: suitable for computer and device to communicate through bluetooth serial port, the use method is the same as serial port
Pairing with mobile phone: suitable for communication between mobile phone and device through Bluetooth serial port, the use method is the same as serial port
Pairing with Bluetooth host: it is suitable for two devices to communicate directly through Bluetooth serial port, such as between single chip microcomputer and single chip microcomputer, wired serial port and single chip microcomputer, etc. The use method is the same as serial port
Flexible use:
Baud rate conversion, because the receiving end and the sending end can choose their own baud rate, in the case of small data volume can be used as baud rate conversion equipment.
2.1 How to connect bluetooth module to computer (effective in slave mode)
Here is an example of pairing it with a Bluetooth computer:
First, power on the Bluetooth passthrough module, and then the LED flashes. Open "My Bluetooth Location" and click "Search for devices in the valid range".
The system searches for bluetooth devices with the default device name "linvor" (modified name if modified, such as "jiayuanelectron"), double click or right click and choose "add bluetooth device".
Enter the pairing password (default: 1234),
Click "Next". If the password is correct, the connection between the computer and the passthrough module will be established. If bluetooth serial port device has not been installed before, the system will automatically install the driver and generate a virtual serial port
Click Config, select the appropriate COM port,
I can only choose COM5 here, which is the serial port for computer operation after connection. For example, WHEN I open com5 here, the LED of Bluetooth module will change from quick flash to double flash. At this time, you only need to use bluetooth module as the serial port of fixed baud rate of computer, but it is wireless.
Tips:
1. The supply voltage must be 5V, not 3.3V
2. Do not connect the pin of the power cable to the data cable. Confirm it carefully before connecting the cable
3. The LED must enter the slow blinking mode before the AT command test
 
4. After each AT instruction is input, you must press enter to send it
5. If OK cannot be returned, swap RXD and TXD
6. Do not tear the heat shrinkable tube or weld it by yourself. Otherwise, the warranty and return and replacement service will be waived
 
 
7. The RXD and TXD on UNO cannot be used to connect bluetooth module for AT instruction test

Descripción
 
Ra-02 es un módulo de transmisión inalámbrica basado en el transceptor inalámbrico sx1278. Adopta una tecnología avanzada de espectro ensanchado LoRa, con una distancia de comunicación de 10.000 metros. Tiene una fuerte capacidad antiinterferencias y tiene la función de consumo de aire. Puede cubrir a miles de personas en el entorno del distrito, especialmente adecuado para lectura de medidores, hogar inteligente, equipo de alarma antirrobo.
El módulo LoRa series Ra-01 está diseñado y desarrollado por la tecnología AI-THINKER. El módulo RF SX1278 se utiliza principalmente para la comunicación de espectro extendido de largo alcance. Puede resistir al mínimo consumo de corriente. Gracias a la LoRa patentada de SEMTECH™Tecnología de modulación, El SX1278 tiene una alta sensibilidad de-148 dBm con una salida de potencia de 20 dBm, una larga distancia de transmisión y alta fiabilidad. Al mismo tiempo, en comparación con la tecnología de modulación tradicional, LoRa™La tecnología de modulación tiene ventajas obvias en anti-bloqueo y selección, lo que resuelve el problema de que el esquema de diseño tradicional no puede considerar la distancia, la interferencia y el consumo de energía al mismo tiempo.
Características
 
LoRa™Tecnología de modulación de espectro extendido
Salida de potencia constante RF a 20dBm-100mW cambio de voltaje
Alta sensibilidad: hasta-148dBm
Comunicación SPI semidúplex
Tasas de bits programables de hasta 300kbps
Compatible con FSK, GFSK, MSK, GMSK, LoRa.™Y modos de modulación OOK
Rango Dinámico RSSI de 127dB
Detección automática de señal RF, modo CAD y AFC de muy alta velocidad.
Motor de paquetes con CRC hasta 256 bytes
Paquete de parche de agujero de sello de doble fila de huella pequeña
Carcasa blindada
Antena de resorte
 
Lista de paquetes
 
SX1278 433M inalámbricoLoRaMódulo 02X 1 ud.

Descripción
 
Ra-02 es un módulo de transmisión inalámbrica basado en el transceptor inalámbrico sx1278. Adopta una tecnología avanzada de espectro ensanchado LoRa, con una distancia de comunicación de 10.000 metros. Tiene una fuerte capacidad antiinterferencias y tiene la función de consumo de aire. Puede cubrir a miles de personas en el entorno del distrito, especialmente adecuado para lectura de medidores, hogar inteligente, equipo de alarma antirrobo.
El módulo LoRa series Ra-01 está diseñado y desarrollado por la tecnología AI-THINKER. El módulo RF SX1278 se utiliza principalmente para la comunicación de espectro extendido de largo alcance. Puede resistir al mínimo consumo de corriente. Gracias a la LoRa patentada de SEMTECH™Tecnología de modulación, El SX1278 tiene una alta sensibilidad de-148 dBm con una salida de potencia de 20 dBm, una larga distancia de transmisión y alta fiabilidad. Al mismo tiempo, en comparación con la tecnología de modulación tradicional, LoRa™La tecnología de modulación tiene ventajas obvias en anti-bloqueo y selección, lo que resuelve el problema de que el esquema de diseño tradicional no puede considerar la distancia, la interferencia y el consumo de energía al mismo tiempo.
Características
 
LoRa™Tecnología de modulación de espectro extendido
Salida de potencia constante RF a 20dBm-100mW cambio de voltaje
Alta sensibilidad: hasta-148dBm
Comunicación SPI semidúplex
Tasas de bits programables de hasta 300kbps
Compatible con FSK, GFSK, MSK, GMSK, LoRa.™Y modos de modulación OOK
Rango Dinámico RSSI de 127dB
Detección automática de señal RF, modo CAD y AFC de muy alta velocidad.
Motor de paquetes con CRC hasta 256 bytes
Paquete de parche de agujero de sello de doble fila de huella pequeña
Carcasa blindada
Antena de resorte
 
Lista de paquetes
 
SX1278 433M inalámbricoLoRaMódulo 02X 1 ud.

Descripción
 
Ra-02 es un módulo de transmisión inalámbrica basado en el transceptor inalámbrico sx1278. Adopta una tecnología avanzada de espectro ensanchado LoRa, con una distancia de comunicación de 10.000 metros. Tiene una fuerte capacidad antiinterferencias y tiene la función de consumo de aire. Puede cubrir a miles de personas en el entorno del distrito, especialmente adecuado para lectura de medidores, hogar inteligente, equipo de alarma antirrobo.
El módulo LoRa series Ra-01 está diseñado y desarrollado por la tecnología AI-THINKER. El módulo RF SX1278 se utiliza principalmente para la comunicación de espectro extendido de largo alcance. Puede resistir al mínimo consumo de corriente. Gracias a la LoRa patentada de SEMTECH™Tecnología de modulación, El SX1278 tiene una alta sensibilidad de-148 dBm con una salida de potencia de 20 dBm, una larga distancia de transmisión y alta fiabilidad. Al mismo tiempo, en comparación con la tecnología de modulación tradicional, LoRa™La tecnología de modulación tiene ventajas obvias en anti-bloqueo y selección, lo que resuelve el problema de que el esquema de diseño tradicional no puede considerar la distancia, la interferencia y el consumo de energía al mismo tiempo.
Características
 
LoRa™Tecnología de modulación de espectro extendido
Salida de potencia constante RF a 20dBm-100mW cambio de voltaje
Alta sensibilidad: hasta-148dBm
Comunicación SPI semidúplex
Tasas de bits programables de hasta 300kbps
Compatible con FSK, GFSK, MSK, GMSK, LoRa.™Y modos de modulación OOK
Rango Dinámico RSSI de 127dB
Detección automática de señal RF, modo CAD y AFC de muy alta velocidad.
Motor de paquetes con CRC hasta 256 bytes
Paquete de parche de agujero de sello de doble fila de huella pequeña
Carcasa blindada
Antena de resorte
 
Lista de paquetes
 
SX1278 433M inalámbricoLoRaMódulo 02X 1 ud.

schematic diagram and datasheet are available
 
 As basic function, this module could read and write RFID card. Various cards could be supported.
 
We've taken our popular  PN532 breakout board and turned it into a shield - the perfect tool for any 13.56MHz RFID or NFC application. The mini NFC shield uses the PN532 chip-set (the most popular NFC chip on the market) and is what is embedded in pretty much every phone or device that does NFC. This chipset is very powerful, and can pretty much do it all, such as read and write to tags and cards, communicate with phones (say for

schematic diagram and datasheet are available
 
 As basic function, this module could read and write RFID card. Various cards could be supported.
 
We've taken our popular  PN532 breakout board and turned it into a shield - the perfect tool for any 13.56MHz RFID or NFC application. The mini NFC shield uses the PN532 chip-set (the most popular NFC chip on the market) and is what is embedded in pretty much every phone or device that does NFC. This chipset is very powerful, and can pretty much do it all, such as read and write to tags and cards, communicate with phones (say for

 
Product Details
12V soil moisture sensor controller module Lower humidity start automatic watering
Humidity is below the set humidity start means that when soil moisture is below the set humidity , the relay will automatically pull, start spraying , water pumps , etc. do humidifying action reaches the set humidity is automatically stopped.
Purpose:
Adjustable via potentiometer control soil moisture threshold , which can automatically vegetable garden , garden automatic watering , household pots of soil moisture control , electronic game , etc., with a power relay , can control high current devices , less than the set humidity automatically start relay , more than the set humidity automatically disconnected , and a delay function to resolve without delay the humidity critical state relay flickered question is a simple and practical soil moisture control system.
Product description:
1 using the company\'s high-quality soil to make the soil moisture sensor detection surface is nickel plated, has widened sensing area can improve conductivity, prevent rust easily contact with soil problems and prolong life ;
(2) products can be controlled over a wide range of soil moisture , adjustable via potentiometer control the corresponding threshold , the humidity is below the set value, the relay starts , higher than the set value, the relay is switched off ;
3 product with a delay function , delay 3-5 seconds , when the humidity in the critical condition is detected , the relay does not flicker , flicker occurs ;
4 high-quality products using Songle relay can withstand the load of 1500W , meet the requirements of most people ;
5 products with a power indicator and relay instructions ;
Electrical parameters:
Supply voltage : 12VDC Input current : more than 100ma
Load : 250V 10A AC or DC 30V 10A (below a current of this range can be used)
Module for use:
1 soil moisture sensor for detection ;
2 module blue potentiometer is used to adjust the soil moisture threshold , clockwise adjustment, control humidity greater counterclockwise smaller ;
3 with a delay due to the module functions in the regulation of humidity values , each tune a need to wait for 5-8 seconds or so to see changes in the relay , the green LED lights also have the corresponding changes until transferred to meet the requirement.
 
 
 
 

ESP32-T is designed specifically for the ESP32 module design of the floor, and leads to all of the GPIO module, to facilitate the user to do a variety of tests.
If you are using the ESP32 module, the bottom board will be your right-hand man!
Characteristic
1, the use of USB as the bottom of the CP2102 to the serial port, super stable!
2, support a key to download, eliminating the cumbersome operation
3, support ESP32-Bit and other modules
4, support Linux, Windows, Mac three development platform
5, pin reservation is not welded, the user can according to their own needs, the pin welding is above or below
6, design ingenuity, inserted on the bread board just reserved on each side of a row of holes, convenient user experiment.
Firmware Library
Github esp-idfAddress:github.com/espressif/esp-idf
Compiler tool chain:
Cross-NG
 

Warm prompt: Dear buyer, Our cheapest transportation services Economic 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.
DC-DC Adjustable Step-down Power Supply Module Voltage Current LCD Display Shell
 
 
 
 
 

Warm prompt: Dear buyer, Our cheapest transportation services Economic 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.
DC-DC Adjustable Step-down Power Supply Module Voltage Current LCD Display Shell
 
 
 
 
 

Warm prompt: Dear buyer, Our cheapest transportation services Economic 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.
DC-DC Adjustable Step-down Power Supply Module Voltage Current LCD Display Shell
 
 
 
 
 

New RAMPS 1.4 RRD Fan Extender For DUAL-EXTRUSION, 3D Printer, Reprap

AD9833 Programmable Microprocessors Serial Interface Module Sine Square Wave DDS Signal Generator Module
 
2.5

48 MHz STM32F030F4P6 Small Systems Development Board CORTEX-M0 Core 32bit Mini System Development Panels
 
 

 
 
 
 
 
801S vibration sensors.
Product Name: vibration sensor
Product Number: 801s
Product Specifications: 9.0 * 9.15mm
Product description:
 Performance:
Extremely wide range of vibration detection.
Direction to limit
60,000,000 vibration Special gold-plated to ensure the surface of (pin)
Low loss, sensitivity by the circuit to adjust

 
 
 
 
 
801S vibration sensors.
Product Name: vibration sensor
Product Number: 801s
Product Specifications: 9.0 * 9.15mm
Product description:
 Performance:
Extremely wide range of vibration detection.
Direction to limit
60,000,000 vibration Special gold-plated to ensure the surface of (pin)
Low loss, sensitivity by the circuit to adjust

 
 
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
 
 
 
 

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

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

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

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

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

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

Electrical Characteristics:
 
1. The Maximum Output Current: 2A.
 
2. The Input Voltage: 2V ~ 24V.
 
3. The Maximum Output Voltage: 28V.
 
4. Efficiency: Max 93% .
 
Mechanical Properties:
 
Product Size: 36 mm * 17 mm * 14 mm.
 
Method Of Use:
 
The module of the IN and - after 2~24v, IN adjusting the potentiometer can adjust output voltage, output voltage is greater than the input voltage.
 
Matters Needing Attention:
 
1. The input voltage should not exceed the maximum input voltage.
 
2. The peak current output current is no more than TV university.
 
When the module output voltage can not be adjusted, the output  voltage is always equal to the input voltage.Please adjust the potentiometer counterclockwise 20 laps or more. (Let potentiometer against your chest, counterclockwise turn boost)
 
Package Including:
 
10pcs MT3608 2A Max DC-DC Step Up Power Module Booster Power Module
 

 
 
Development Kit Motor Shield esp wifi esp8266 esp-12e esp 12e kit diy rc toy remote control Lua IoT smart car
US 4.7 / piece /lot 1
base ESP8266 testing DIY Breadboard
US 1.5 / piece /lot 1
ESP8266 kit base 40P wires testing DIY Breadboard
US 6.42 / set /lot 1
Smart Electronic ESP8266 kit Lua Wifi Intternet of Things Development Board DIY Breadboard
US 7 / set /lot 1
Motor Shield Board L293D for ESP-12E from ESP8266 esp 12E kit diy rc toy wifi rc smart car remote control
US 1.63 / piece /lot 1
Smart Electronics ESP-12E D1 WiFi uno based ESP8266 shield for arduino Compatible
US 3.5 / piece /lot 1
1pcs NodeMCU V3 Lua WIFI module integration of ESP8266 extra memory 32M Flash, USB-serial CH340G
US 2.35 / piece /lot 1
UNO WiFi R3 ATmega328P ESP8266 (32Mb memory), USB-TTL CH340G. Compatible for Arduino Uno, NodeMCU, WeMos ESP8266
US 8.95 / piece /lot 1
WEMOS Mega WiFi R3 ATmega2560 ESP8266 (32Mb memory), USB-TTL CH340G. Compatible for Arduino Mega, NodeMCU, WeMos ESP8266
US 12.98 / piece /lot 1
 
 
1PCS Wireless module CH340 NodeMcu V3 Lua WIFI Internet of Things development board based ESP8266
US 2.77 / piece /lot 1
 
 
 
 
 
Limited number available on all flights
32 Things kernel dedicated SOC powerful system , but also with WIFI TCP / IP application ! Can quickly developSupport computer terminal end interface to access the phone side , so your device to share your information t
 
 
V3 Wireless module 4M bytes Lua WIFI Internet of Things development board based ESP8266 for Compatible
 
 
 
 
 
 
o the world every corner of your mind !
 
It\'s that powerful, developed so simple ! So low cost .
 
 
 
 
 
2.2.35

 
 
Features:
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
Package including:
1602 16x2 HD44780 Character LCD Display Module Blue Blacklight
 
 
 

 
 
Features:
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
Package including:
1602 16x2 HD44780 Character LCD Display Module Blue Blacklight
 
 
 

 
 
Features:
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
Package including:
1602 16x2 HD44780 Character LCD Display Module Blue Blacklight
 
 
 

 
 
Features:
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
Package including:
1602 16x2 HD44780 Character LCD Display Module Blue Blacklight
 
 
 

 
 
Features:
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
Package including:
1602 16x2 HD44780 Character LCD Display Module Blue Blacklight
 
 
 

 
 
Features:
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
Package including:
1602 16x2 HD44780 Character LCD Display Module Blue Blacklight
 
 
 

 
About D1
based on the ESP-8266EX.
Arduin Compatible, you can use it on Arduin IDE.
11 Digital I/O pins
1 Analog Input pin
OTA   -- Wireless Upload(Program)
On board switching power supply -- Max 24V input, 5V 1A output
 
 
 

     Features:
     100% Brand New.
    Size: 48mm x 29mm x 26mm.
    Display color: Red & Blue LED (dual display).
    Display: 0.28" LED digital.
    Operating voltage: DC 4.5 ~ 30V.
    Measure voltage: DC 0 ~ 100V.
    Minimum resolution (V): 0.1V.
    Refresh rate: ≥500ms / times.
    Measure accuracy: 1% (± 1 digit).
    Minimum resolution (A): 0.01A.
    Operating Current: <20mA.
    Measure current: 10A (direct measurement, built-in shunt).
    Operating temperature: -10 to 65°c.
    Operating Humidity: 10 to 80% (non-condensing).
    Mounting cutout: 45.5mm x 26.5mm.
Package Content:
1 x DC 0-100V Voltmeter Ammeter  
 

   The device monitors the current through a small test resistor between the battery and the negative cargo charger circuit. Because charging is the time of current accumulation,The charge and discharge of the battery can be indicated by a series of output pulses of a single communication pin which is measured by the Micro-Controller.It supports one or two Li ion batteries. Only an external detection resistor and a filter capacitor can provide a very small and simple scheme to monitor the activity of the battery charging . The micro controller provides a series of output pulses and a polarity signal. In this way, the system can start counting from the full charge state and estimate the remaining battery power at any time during the battery charge or discharge period.

 
Name: QMC5883 modules (three-axis magnetic field module)
Model: GY-273
Using the chip: QMC5883
Power supply :3-5v
Means of communication: IIC communication protocol
Measuring range: ± 1.3-8 Gaussian
Size: 13.9 * 18.5
 
 
 

Connection mode:
RX to TX.
TX for RX.
The surface-to-surface (GND to GND)
Turn the USB serial platelet function:
1 a simple serial communication.
2 the router or ADSL firmware upgrade.
3 GPS serial communication.
4 HDD firmware upgrade.
5 easy to use, RX TX from MCU;TX. Upon receiving the RX MCU in connected to ground.Without with MAX232 conversion.
6 the super terminal in use;Commonly used serial debugging tools.
7 all kinds of satellite machine for upgrading.

 
 
 
 
Package List:
1pc x DHT22 Temperature & humidity Sensor Module
 
 
 

 
New 1000KV 1000000V Boost Step up High-voltage Generator Ignition Coil Pulse Power Module Igniter DC 3.7V to 7.4V
 

Features:
Ultra-thin design
Easy to install
Fast Heat dissipation
Smooth and straight aluminum material
All ports and slots of the case can match with Raspberry Pi 4 Computer Model B perfectly
Open case design, you don't need to worry it will effect wifi signal any more
Reinforced aluminum material, lightweight and durable, long-lasting stainles
We use silicon cooling pad (the thickness is only 0.5mm) to touch the shell body to dissipate heat. You can use the CPU grease to relace the silicon colling pad to get better heat dissipation.
 
Dual Fan:
 Noise: 18dB
 Low Power Consumption Design
 Dual Cooling Expericnce, More powerful heat dissipation
 Very Quiet Cooling Fan, get rid of the fan noisy 
 All of the Fans were Tested by Our Engineer, Very Nice Quality Control
 Update Thermal Tape Can Make Sure Best Heat Conduction Effect