Typhon is a reef controller powered by an ATMEGA328P with a 16 x 2 character LCD screen. It provides a structure to fade 4 independent channels of LED lighting on and off each day to simulate sunrise and sunset and mini-USB ports for up to 2 temperature sensors and a relay.
Parts list, schematic, and board layout are available in the hardware/ directory. Assembled Typhon controllers can be purchased from stevesleds.com for about $45 USD.
Requires LiquidCrystal, Wire, EEPROM, EEPROMVar, Time, DS1307RTC, and Button libraries.