WIP: ATmega168 Dev Board

This project is still in the making...

A Development Board for the ATmega168PA microcontroller.

Features are:

• JST connectors for UART, I2C (TWI) and SPI
• all MCU pins are accessible through 0.1" pin sockets
• exchangeable external oscillator
• selectable supply voltage for MCU (3.3V, 5V, external)
• standard ISP (ICSP) connector
• replaceable UART-to-USB daughterboard
• power source options: USB and external
• on-board power supply for converting the 5V from the UART-to-USB board down to 3.3V. It can deliver up to 1.5A - if the USB port allows it
• pull-up and pull-down resistors for I2C (TWI) and SPI can be enabled/disabled through jumpers
• two sockets for the MCU (only one can be used at a time):
  • ZIF (Zero Insertion Force) socket for MCU
  • custom socket for custom break-out board