diy didi
Member
Hi all!
I built this circuit a while ago.. It works like a charm, but.... Sometimes the heating element doesn't switch on. I do get about 5 volts on pin 6 of the opamp. Checked for dry joints. Still the same thing. Its almost as if sometimes the triac fires on, and sometimes it doesn't.. Could it be the diode and 100ohm res? Or perhaps a too low supply voltage. Triac is a BT136. Feedback??
I built this circuit a while ago.. It works like a charm, but.... Sometimes the heating element doesn't switch on. I do get about 5 volts on pin 6 of the opamp. Checked for dry joints. Still the same thing. Its almost as if sometimes the triac fires on, and sometimes it doesn't.. Could it be the diode and 100ohm res? Or perhaps a too low supply voltage. Triac is a BT136. Feedback??
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