1 on-board MAX485 chip , is a tool for RS-485 communications , low-power , Slew-Rate Transceiver
2 onboard then 5.08 (mm) pitch 2P terminal for easy wiring RS-485 communication
3 the chip has drawn all of the pins can be controlled by the microcontroller operation
4 Working voltage : 5V
5 board size : 44 (mm) x14 (mm)

100% brand new and high quality!
This section of induction heating using low-voltage DC power supply 12-48V.
Maximum current 20A, maximum power 1000W.
Can be used for DIY players to heat treatment of small parts such as quenching, annealing, etc.
Can directly heat iron, carbon steel, graphite, titanium alloy and other materials.
Also can be used with a graphite crucible melting gold, silver, copper, aluminum and other metals, uniform heating fast, very convenient.

The main technical parameters:

1, using voltage: DC5V 2: static current: less than 2 ma
3, high level output: 5 v
4, level output: 0 v
5, induction Angle: no more than 15 degrees
6, detection range: 2 cm - 450 cm
7,high precision: up to 0.3 cm

CH32F103C8T6 chip is compatible with STM32F103C8T6 series chips, all pins are compatible, all registers are compatible.

1.Aplly Battery Type:18650 battery(not include)
2.Output Voltage: 5V 2.1A
3.Input Voltage: 5V1A
4.Instructions: Level 4 Capacity indicator
5.Lighting: with LED lights
6.Size: 140 * 64 * 22mm
7.Rated Voltage : 3.7V ( Suit for 3.2V-4.2V. The batteries are in parallel)

MAX7219 is an integrated serial input/output common-cathode display driver, which connects a microprocessor and an 8-digit 7-segment digital LED display, and can also be connected to a bar graph display or 64 independent LEDs. It includes an on-chip B-type BCD encoder, multiple scan loops, segment word drivers, and an 8*8 static RAM to store each data. Only one external register is used to set the segment current of each LED.

The main control chip CSR8645 stereo audio module can make calls. The headset can be connected to 2 mobile phones at the same time. CSR has better sound quality. BLE 4.0, good wall penetration effect, APT-x high sound quality transmission.

The mega r3 atmega2560 and WiFi esp8266 have 32MB of memory. All modules can work individually or together. And everyone has their own pin header. Convenient solutions to develop new projects, UN and WiFi. You can update and sketch via USB and firmvare for atmega2560 and for esp8266. This car has a USB serial converter ch340g. Using this board is very simple. Ancelotti's DIP switch board, connected module. For example, a USB interface: USB and atmeg2560, and esp8266, atmega2560 and esp8266.