0
$\begingroup$

I have a problem with knowing witch capacitor to use in a circuit because I am working on installing main circuit breaker where it is needed for 220 Volt AC current to be turned in to a lower current of 12 Volt useing a tramsformer. I would like to know how to calculate the capacity in farads without knowing the charge of the capacitor needed. The formula to calculate the capacitance of a capacitor Q=C/V would be more usefull in my opinion if I could know how to determine the charge of a capacitor.I want the AC current to be turned into DC current useing the right capacitor

$\endgroup$
3
  • 1
    $\begingroup$ You can't turn AC into DC using just a capacitor. $\endgroup$ – The Photon Mar 1 '20 at 20:48
  • $\begingroup$ This question is probably more suitable for the Electrical Engineering site than Physics. But please take a look at electronics.stackexchange.com/q/73863 first, so that you don't ask a duplicate question there. $\endgroup$ – PM 2Ring Mar 1 '20 at 20:51
  • 2
    $\begingroup$ I suppose you have a rectifier and want to know what capacitor goes behind it? It very much depends from the amount of current you will be using on the 12V= side, the larger the current, the larger the capacitor, $\endgroup$ – trula Mar 1 '20 at 20:53
0
$\begingroup$

To convert AC to DC, you will need a pn-junction (atleast two) which will allow for full-wave rectification of the current. This can be stabilized with the help of a capacitor in parallel or an inductor in series. The exact calculations depend on the specifications of the circuit.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.