I am working on an IP Mains Switch. The circuit shown below is my version of the example given in Figure 15 of the MOC30xx datasheet.
My problem is that occasionally, I notice that the Load (the 3W LED bulb) will flash as I apply the 240VAC to power-up the circuit?
While it does not matter for this use case. If I was driving a motor or cutter it would matter if an operator had their fingers in the "sharp bits".
I had read in my searching for a solution, that TRISCs in this type of configuration "could" conduct for the first half-cycle before switching off at the next zero crossing. However, can the human eye see a 0.01Sec flash?
I am fairly sure that the issue is on the TRIAC side of the optocoupler, because even with the input (pin 1) to the MOC3043M grounded, I still see this flash during power-up.
My problem is that occasionally, I notice that the Load (the 3W LED bulb) will flash as I apply the 240VAC to power-up the circuit?
While it does not matter for this use case. If I was driving a motor or cutter it would matter if an operator had their fingers in the "sharp bits".
I had read in my searching for a solution, that TRISCs in this type of configuration "could" conduct for the first half-cycle before switching off at the next zero crossing. However, can the human eye see a 0.01Sec flash?
I am fairly sure that the issue is on the TRIAC side of the optocoupler, because even with the input (pin 1) to the MOC3043M grounded, I still see this flash during power-up.
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