Description PIC16F72 is a little classical IC, but cheap enough as a start point for PIC. PIC16F72 has following features: 25 I / O ports, 12 interrupts, 11 channels 8-bit AD conversion, two 8-bit timers, a 16-bit timer, 128 bytes SRAM, addressable general purpose synchronous / asynchronous transceivers, 2048 words of flash program memory. Board Features: All I / O ports are led to facilitate the user external to other peripherals. On-board 8MHZ crystal. On-board power indicator. On-board reset button. MicroUSB mini power jack. Lead out programming interface to facilitate users to download debugging, PICkit can easily program it well. Size 37MM * 32MM. Schematic please see on this page.