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Hi diy_bloke,Thank you so much for your response. I have 2x 47k 1/4W resistors on the AC side of the bridge rectifier. I also have a 1k 1/4W resistor and a 0.1uF capacitor connected from the emitter of the optocoupler to ground. I am sure the potentiometer is connected correctly. Also, I just verified there are no shorts in the breadboard. I switched out the type of optocoupler I was using from an EL817 to a 4N25, but this did not help either. There is a 330ohm resistor connected in series with the internal LED of the optocoupler. This is to ensure the forwarding current doesn't exceed 60mA.
Hi diy_bloke,Thank you for your response. I am using 2x 47k 1/4W resistors going to the input of the bridge rectifier. I am also using one 1k 1/4W resistor and a 0.01uF capacitor from the emitter (pin 4 of 4N25) to ground. The potentiometer is connected correctly. Also, I haven't found any shorts in the breadboard.
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