EE question: A DPST switch, a neon lamp, and a resistor walk into a bar...
Posted: Mon Nov 28, 2016 7:02 pm
I'm building a custom "IEC box" (IEC plug, breaker, and switch) for a 3D printer, which I will release on Thingiverse when I'm done messing with it:
I got an illuminated 120VAC DPST switch. It has four pins on the back:
Inside, there are two contactors, one for each side:
Sitting on top of the contactors is a pair of round metal pins:
Those pins connect to a neon lamp, and a resistor:
I'm having trouble getting the bulb to light without any white smoke appearing. Here are the combinations I've tried:- Load wired to both left pins, or both right pins: Current passed, no illumination
- Load wired to top pin on one side, and bottom pin on other side: No (or very little) current passed, but the bulb lights up
- Load wired to pins on one side, with each pin jumped to its neighbor: Loud popping sounds, white smoke, bad smell