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Capacitor Voltage Values - theory only

dc11

May 16, 2011
8
Joined
May 16, 2011
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Hi all,

I've implemented the following circuit successfully controlling a 12v lamp. I'd just like to improve my understanding though.

This circuit (from MOC 3020 AN) is based on 240V AC but it works perfectly with my 12V AC supply.

1 - what would the voltage values of the 2 capacitors need to be if it was using 240V and how is this calculated?
2 - what would the watt rating of the resistors need to be and why?
3 - would the current draw of the load make a difference to those calculations?



Thanks in advance.
 

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