Electronics > Beginners
AC Dimmer Circuit
vidarr:
I am having a problem with this dimmer circuit. The circuit was working until my wife stepped on it. The DIAC and one of the resistors were destroyed. I replaced the DIAC with exact match. The resistor I am not too sure. It looked like 2.2k Ohms color bands. I put the circuit back together and it was not working. So, I rebuilt the whole thing with new parts same values on everything except the one 2.2k resistor that I am not sure of. Pretty sure I got the circuit right, but it is still not working. Can someone take a look please?
Thanks
edit: I can take a picture of the as-built circuit if needed.
Zero999:
It looks fine to me.
What do you mean by 1k capacitors? Presumably that's 1kpF which would be 1nF? Not 1kF, which would be the size of a house!
soldar:
--- Quote from: Zero999 on December 27, 2018, 01:51:14 pm --- What do you mean by 1k capacitors? Presumably that's 1kpF which would be 1nF? Not 1kF, which would be the size of a house!
--- End quote ---
It is quite customary to express the value of capacitors in pF unless otherwise indicated.
The circuit looks good to me and should be quite easy to troubleshoot.
vidarr:
It is these... The orange are the old. The blue is one of the new ones.
Also, I had the two resistors in reversed positions. The 12k goes between the capacitors. Does it still seem OK?
edit: I have power in. What is the next best thing to test? This may be lame, but I am still a little nervous around mains power. I don't want to be poking around in there more than needed. Thanks.
soldar:
Not much to go wrong there. Are you sure all the components are good? And they are correctly connected to each other?
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