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Happy new year everyone :) This might be slightly off topic but I know there are some good hardware people here..
Hi, I've been trying, unsuccessfully, to dim a 60W indascent lightbulb with two back to back mosfets similar as in this post:
My circuit looks like this:
(there is also a 2A fast blow fuse and a 7D471K MOV on the mains input)
Below is the output from my scope:
C3: Drain of Q5
C4: Source of Q5 and Q6
Q6 gets burning hot
Q5 stays cool
The lamp (obviously) flickers as we are only getting every other half wave.
Thinking about the circuit I feel that it will be impossible to get a Vgs voltage that is higher than the voltage at the source pin since the source pin will see the peak of the 230VAC?
Is there a way (preferably simple & cheap :)) of solving this kind of double mosfet dimmer?