1、Completely solve the incompatibility and instability of traditional 2560 boards on for win7/win8 systems 2、The main control chip for 16AU has been retained and the USB chip 16u2 has been replaced 3、In most applications, these USB interface chips are only used for serial port "flashing" and communication. Using a professional USB chip can not only reduce the cost, but also meet the application 4、The external interface adds SDA and SCL on the basis of the 2011 version (position on the left side of AREF). The I0REF interface can provide a voltage reference to the shield. And for the compatibility of future series products, a port is reserved on the left side of IOREF 5、The RESET circuit is improved compared to the 2011 version. Prevent accidental reset of RESET, RESET circuit is more stable 1 x For Improved Version1 x USB Cable1 x 30 Bread Lines1 x YB-102 830 Holes Bread Wire5 x Yellow LED5 x Red LED5 x Green LED10 x 1K Resistor10 x 10K Resistor10 x 220R Resistor1 x Male to Female Jump Wire 10pin1 x 10K Potentiometer1 x Passive Buzzer1 x RGB Color Module1 x Relay Module1 x 9V Battery Button1 x Active Buzzer1 x 74HC5951 x Infrared Receiver1 x LM35dz1 x Flame Sensor2 x Ball Switch3 x Photoresistor4 x Button 4 x Button Cap1 x Remote Control1 x 4-Digit Digital Tube1 x 8x8 Dot Matrix Module1 x 1-Digit Display Tube1 x Stepper Motor Driver Board1 x Stepping Motor1 x Servo SG901 x 1620 LCD1 x XY Game Joystick Module1 x Temperature Module1 x Water Test Module1 x Rfid522 Key Identification Card1 x Sound Module1 x Time Module1 x 4x4 Key Board1 x Pin Header Item Type: Development Board KitMaterial: ResinWorking Voltage: 5VInput Voltage: 7-12V (recommended)UT Voltage: 6-20VDigital Input/Output Pins: 54 ChannelsAnalog Input Pins: 163.3V Pin Current: 50mAFlash Memory: 256kb, of which the boot program occupies 8kbSRAM: 8kbEEPROM: 4kbClock Frequency: 16MHzPurpose: Electronics, programming introductory learning kit