auto shutoff reading light. 12v dc power supply-momentary switch-1.2 Farad Capacitor--small LED reading light-? Answered
How long would the lights stay on, how long to charge the Cap? I want to make something for my kids, so they can turn on a reading light in their bed by pressing a button and then have it shutoff about 30 minutes later when they are sleeping, or press the button again if they are still reading. I like to encourage them to read.