i have a input voltage varing from 5volts dc to 15 volts dc.i wanna charge a battery of 12 volts.which capacitor shall i use to get a stable 12 volt dc output.
Hi, the capacitor you will use depends on the battery capacity and type of battery you are going to charge. You didn't specify your current requirement, so its hard to give you a part as a starting point however you can use this one as your working reference https://www.eeweb.com/blog/andrew_carter/identifying-the-characteristics-of-capacitors