Making a sprinkler controller with a mbed

I've been working a while on interfacing the mbed into my sprinkler controller. I have an Orbit controller, and when I took it apart, it used 3.3V logic right before the final drivers to the triacs! The pictures are a hack of the sprinkler box, where I broke out the 4 zone wires. I just need to clip these wires, and put the mbed right between them.

The software project is at and I hope I documented it enough. Basically, the inputs are P17 - P20, and the outputs are P24 - P21.

The idea is that you can send HTTP POST commands to turn on a zone, and HTTP GET to read the current values.


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