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IPAC and volcano button LEDs?

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maraxle:

Does anyone have any info on using an Ultimarc IPAC with the old Atari volcano buttons?  If I wanted to do that, am I going to need the LED harness that Ultimarc sells?  Also, I don't know what the voltage is on those volcano buttons.  Will I need a resistor in there to make it work with it?  Any help would be much appreciated.

Thanks in advance!

Tiger-Heli:


--- Quote from: maraxle on September 09, 2004, 04:10:38 pm ---Does anyone have any info on using an Ultimarc IPAC with the old Atari volcano buttons?  If I wanted to do that, am I going to need the LED harness that Ultimarc sells?  Also, I don't know what the voltage is on those volcano buttons.  Will I need a resistor in there to make it work with it?  Any help would be much appreciated.

Thanks in advance!

--- End quote ---
Search the board on Volcano.  Pretty sure OSCAR had some good info.  As I recall, those are acutally incandescent bulbs, and a straight I-PAC won't work with it.  You could maybe use some type of driver circuit or you could convert the volcano's to 5V leds (or 2.1V LEDs with a resistor).

maraxle:

From all the threads, it sounds like the volcano buttons have LEDs in them.  

What size resistor will I need to be able to use the IPAC with them?  Alternatively, what are the voltage and current ratings on the LEDs?  I don't have them in hand yet so I can't look and see if they're marked.

RayB:

There's a couple threads here that covered it... but there seems to be a little bit of a disagreement on the exact resistor to use. I think 330 is what you should be using.

I will be doing the same as you, but have not yet done it. All I know is after researching it, I settled on 330. But who knows if I'm making a mistake........

Ray B.


MinerAl:

I have done this.  You need to take the +5V from the i-pac and run it through a 330 resistor to the switch.

There is a thread about it here, where OSCAR schools me on how to make it work.

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