[TriEmbed] Circuit Help

Grawburg grawburg at myglnc.com
Fri Dec 4 11:51:13 CST 2015

I have a quarter-turn ball valve with a 12V actuator [HSH-Flo 1/2" DN15 12VDC CR-05 FNPT SS304 Position Feedback Motorized Electric Ball Valve.]  I'm using opto-isolated relay activated by a Raspberry Pi but can only control one direction because the valve reverses direction by flipping the leads. If I was doing it mechanically I would have a double pole triple throw rotary switch. I cannot find a suitable opto-isolated relay that is 2P3T...at least one that doesn't cost a fortune. Any suggestions to help me think this through would be welcomed.

Brian Grawburg

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