Hey all! I know we have some hobbyist here who dabble in switches and soldiering(sp?) and LEDs and whatnot. I have a little question for you (don’t worry, I will research this as well when I get time).
My kids got this dune buggy thing for Christmas, which is pretty cool. However, it doesn’t even have an off switch! Which means it’s a little dangerous when they are getting in and out as they can inadvertently (or advertently) push the accelerator. I want a hard switch and indicator light to act as a safety.
I have a switch, and I have an LED with a resistor (built for (9V, but whatever, I can soldier a new one).
I can put the switch in no problem, that’s easy, just clip, soldier and go. But I want an LED indicator to show whether it’s “off” or “on” which means when the switch is flipped “on” power is coming through the switch from the battery. And the LED light should go on. When switch is off, light should be off.
The battery is 12V lead acid and pretty hefty, with big fat wires (I don’t remember gauges off the top of my head, but I’m guessing like 10 or 8). If I put the LED straight after the switch I’m afraid it will burn it out, or I will have to put a series of resistors on it, which will cut down power to the engine. Is this one of those “parallel current” problems? I’m pretty amateur at this stuff, have only dealt with low voltage 1.5/3/9V batteries to power stuff so far. Never had to deal with a big, beefy circuit like this. Should I splice the line after the switch into two, one path for the mega current, and a resistor on the same path to the LED, then back to the ground?
Hope that question makes sense and I didn’t just embarrass myself. :)
My crappy schematic: