The Burbank controller is a grow box monitor and controller. An opamp is used to monitor water levels, 3 onboard relays select water solenoids to replenish the water supply and a One Wire interface monitors soil temperature.

User interface is via a wireless zigbee network. The system runs on 5 volts, however the Zigbee module requires 3.3 volts which means the I/O's are 3 volts. A 74vhc1g125 module is used for 5 volt to 3 volt translation.