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Wiring Atari volcano buttons in series?

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maraxle:

The searches on this board don't work for me for some reason.  Even though I have the max days set to 999, I only get results back to September of '04...

Anyway, the markings on the buttons say L2V, 125VAC, and 0.1A.  So does that mean I could wire 4 in parallel with a 47 Ohm resistor on the 12V line of my power supply and be okay?  According to that calculator linked above (thanks, by the way), 4 LEDs at 2V each with 100mA each and a 12V power source needs a 39 Ohm resistor, and 47 is the closest I can find.

rdagger:


--- Quote from: maraxle on November 10, 2004, 07:48:12 am ---Anyway, the markings on the buttons say L2V, 125VAC, and 0.1A.  So does that mean I could wire 4 in parallel with a 47 Ohm resistor on the 12V line of my power supply and be okay?  According to that calculator linked above (thanks, by the way), 4 LEDs at 2V each with 100mA each and a 12V power source needs a 39 Ohm resistor, and 47 is the closest I can find.

--- End quote ---

Your LED is NOT rated for 100mA.  It should be between 10 and 20 mA.  I would start with a 390 ohm resistor and see how it looks.  You could then try lower values if it is too dim.  You can not damage the LED's by using a resistor value that is too high, but you can ruin the LED's instantly if you use a value that is too low.

I've bought a few volcano buttons and after 20+ years most needed to have their LED's replaced.    You can go to Radio Shack and buy 4 new red LED's and they should come with specifications.  This will insure that all the volcanos are the same brightness.  Don't use super bright because they will be too bright.

maraxle:

These things are so not worth the hassle, but it's not for me, so I don't have much choice.  I am just dying to get this cabinet out of my house...

Maybe I'll just wire them in parallel on the 5V line with the 330 Ohm resistors since that's known to work.  This is the second to last thing to do on the cabinet (t-molding is last) and then I can get my friend to come pick it up.

NoOne=NBA=:

That's the safest bet.

Another question this brings up is:
Were the resistors on the PCB in the original cabs?

RayB:


The original cabs used a special power regulator circuit board that output a variety of voltages...


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