1、It adopts laminated style, which leads to all the I/O ports for R3 motherboard, and has two onboard LEDs, a reset button and an external power interface. 2、Specially designed port, it is very convenient to use, powerful expansion ability, compatibility and usability, stable performance and high reliability. 3、Designed for R3 control board and compatible control board, suitable for beginners, do not have to headache for complicated and complicated circuit wiring. 4、The circuit is simplified, and common sensors can be easily connected. A sensor requires a universal 3P sensor cable (no distinction between digital and analog cables). 5、After completing the circuit connection, write the corresponding program to download to the controller to read the sensor data, or receive the wireless module to return the data, and after the arithmetic processing, the interactive work is easily completed. 1 x Expansion Board Condition: 100% Brand NewItem Type: Expansion BoardMaterial: Printed Circuit BoardPin Description:I/O Port:14 digital pins, including 6 PWM function pins and 8 analog pinsOnboard LED, reset button and external power port:Red LED - power indicatorYellow LED - connected to D13 pinRESET button5V external power portSpecially set up the following interfaces:IIC interfaceServo controller interfaceFor Bluetooth module communication interfaceMemory card module communication interfaceAPC220 wireless RF module communication interfaceUltrasonic sensor interface12864 LCD serial and parallel interfaceFitment: Fit for R3 control board