Hardware

The board is controlled by an ATMEGA 328 chip running the Arduino bootloader.  The chip controls the 7-segment LEDs and reads the temperature from a voltage divider. The is an optional header for a FTDI cable connection.

Version 2 Eagle files:

Logic board schematic and layout

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power board schematic and layout

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Version 1 files:

Eagle schematic (png) and board (png)