 triacs and triggering
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BigBad
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Registered Member #2529
Joined: Thu Dec 10 2009, 02:43AM
Location:
Posts: 600
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IamSmooth wrote ...
I hooked up a test circuit with my triac and optocoupler to my solenoid valve. The solenoid was connected to 120vac. I used a 5v trigger to simulate the output from a uP. Worked the first time. Boom. (That's a good boom...not a chip getting fried boom).
I wasn't so lucky, I had inadvertently connected the substrate pin on my optotriac, and this gave me half wave behaviour- but only with inductive loads; and it worked fine with resistive loads. (Doh!)
The snubbing was actually very easy once I'd debugged the circuit.
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Steve Conner
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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
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Gabriel35, a circuit based on a couple of 555 timers :) 
Later I redesigned it so it could be remote controlled by an 0-10V analog signal.
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