How Long Does the Sinden Lightgun’s Capacitor Take to Discharge?

When working on a Sinden Lightgun, whether you’re fitting a trigger mod or doing other maintenance, you’ll usually hear the same warning: be careful around the big capacitor in the handle . That capacitor powers the recoil solenoid, and when fully charged it holds around 20 volts . If you accidentally short its terminals with your hand or a tool, you could get a sharp (and very unpleasant) shock. But that raises a sensible question: how long does it take for the capacitor to discharge after you unplug the gun? It’s easy to say “wait before you open it up,” but what does “safe” actually mean in practice? I decided to put it to the test. Setting Up the Test To measure the discharge rate, I connected my multimeter directly to the capacitor’s terminals and watched the voltage over time. Since the capacitor was already flat, I first needed to charge it. Plugging the Sinden into my PC and enabling recoil in the Sinden software sent the voltage climbing almost instantly. Within just a ...