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How do I wire the led in atari/cherry volcano buttons?
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Sizzler:
I just got a couple old cherry switches for my volcanos and wanted to ask about wiring them before I tried anything.

I can tell which terminals are for the light, but I.m not sure about the power and polarity and don't want to burn the led out while testing it.   The button looks like it has 12v printed on it, but the printing is a little tough to read and it actually looks like 1.2v

I looked in the wiki and didn't find any wiring information but here's a photo of the kind of switch I have:



Should I feed this 12 volts DC and which terminal should be positive and which should be negative?

cw:
I can double check later... but I am thinking that the two side post are the led power and ground  (left side showing is ground) the three other post are the no, nc , and ground
arzoo:
cw is correct, the two side posts are for the LED. I used a 220 ohm resister and wired into an LEDWiz. The resister can go on the + or - terminal.
Rocky:
Don't power them with +12v

The rating on the side is 125v  and that is the amount of current the switch can take, not the LED. (Ask me how I know)

Anyway, power the LED with +5v with a 220 ohm resistor inline.  Polarity on the resistor doesn't matter.  If you hook up the leads to the LED backwards, it won't hurt it, just reverse it.


The resistor basically lowers the voltage to about 2.2v

Good luck,
Rocky
Sizzler:

--- Quote from: Rocky on October 04, 2006, 08:56:49 am ---Don't power them with +12v

The rating on the side is 125v  and that is the amount of current the switch can take, not the LED. (Ask me how I know)
--- End quote ---

Yikes!  Did you see smoke?  :)   Yeah.  I knew the "125VAC" printing wasn't the rating of the LED but, at the top right my switch is stamped 1.2v or 12v, just like the one in that pic so I thought that might be for the LED.  Still I wanted to check with other users first.


--- Quote ---Anyway, power the LED with +5v with a 220 ohm resistor inline.  Polarity on the resistor doesn't matter.  If you hook up the leads to the LED backwards, it won't hurt it, just reverse it.
--- End quote ---

Cool.  Thanks for the replies everbody.
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