AVR 8-bit microcontroller development board scratch graphical programming Power supply, for can be powered by USB connection or external power supply, and automatically selects the power supply Using the pinMode(), digitalWrite() and dighi-talRead() functions, the 54 digital pins on the can be used as input or output. Their operating pressure is 5V. Each pin can source or accept 40mA and has an internal pull-up resistor of 20-50K (disconnected by default.) for 2560 has a reset fuse, which can protect the computer USB port from short circuit and overcurrent damage. If the current on the USB interface exceeds 500mA, the fuse will automatically cut off the connection until the short circuit or overcurrent condition occurs. Physical properties, 4 screw holes allow the circuit board to be attached to the surface 1. Microcontroller: ATmega2560 2. Analog input pins: 16 3. Working voltage: 5v 4. 3.3V pin DC current: 50mA 5. Clock speed: 16MHz 6. Static memory: 8KB (ATmega2560) 7. Input voltage: No external power supply is required when connected to USB Static memory/8KB (ATmega2560) or external 7V~12VDC input; EEPROM/4KB (ATmega2560) maximum voltage is 12V, try to use 9V 8. DC current for each I/0 pin: 40mA 9. Output voltage: 5VDC output and 3.3V DC output 10. Digital I/0 pins: 54 (15 of them provide pwm output) 11. Flash memory space: 256K (of which 8K is used to load the program) Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Material: PCB colour: As Shown Package Contents: 1 x Development Board Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.