4Channel Xbee Sprinkler Controller
I built this simple XBee based sprinkler controller for my home automation system. Its so basic there is no schematic.
The digital IO lines on the XBee to drive a few TIP120 darlington transistors I had in my parts box. No extra logic or firmware required.
A salvaged power switch and IDC connector bring power into the box. The large transformer and bridge rectifier are all it takes to power the solenoids. A linear regulator and some caps feed the XBee.
Software wise, I’m just using a cron job to trigger a script that sets the XBee IO line state.
|Closeup of the Circuit Board|
|Ready to close up|
|Finished Sprinkler Controller|