Hello all,
I'm currently doing some work on a piece of equipment which has been in my work's storage cupboard for about 8 years. On said piece of kit was this PCB that has seen better days (picture attached). I can't find any paperwork for it and it doesn't appear on any of my electrical drawings although I am told it controls a heater. Studying the components and its application leads me to believe its a triac/diac dimmer circuit with hysterisis elimination much like the one I have attached.
My question is what is the significance of the three passive components I've highlighted; they are two capacitors and a resistor and lead me to believe they are part of a feedback loop of some sort but how does that integrate into this circuit, what is the significance of it and is it very important to the circuit as a whole?
I'm currently doing some work on a piece of equipment which has been in my work's storage cupboard for about 8 years. On said piece of kit was this PCB that has seen better days (picture attached). I can't find any paperwork for it and it doesn't appear on any of my electrical drawings although I am told it controls a heater. Studying the components and its application leads me to believe its a triac/diac dimmer circuit with hysterisis elimination much like the one I have attached.
My question is what is the significance of the three passive components I've highlighted; they are two capacitors and a resistor and lead me to believe they are part of a feedback loop of some sort but how does that integrate into this circuit, what is the significance of it and is it very important to the circuit as a whole?
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