Question about the Road Rage.

[JakeFuzz]

I want to build a few of these in little boxes for my Faultline and my Fulldrive. I want to know, if i hooked up my onespot (or some other simple 2.1mm psup) to a single board and wired several output plugs in parallel, how many pedals could I power with just one Road Rage? It seems to me there is going to be some current limiting factor in the charge pump or voltage regulator. I am only trying to power two pedals at the moment but the added plugs could be useful in the future. 

[JakeFuzz]

Just so nobody has to do any extensive research, spec sheet for a maxim 1044 says it can deliver 10ma and most voltage regulators I have found deliver up to 100ma.

On a side note could you use two charge pumps (with a voltage dividing resistor in between b/c charge pumps have a max 12 volt input) and a voltage adjustable regulator to get a very accurate 0-18 volt range? Would be kind of cool to have that range on a pot, maybe with a color changing resistor on a dual gang pot!   

[madbean]

The charge pumps can supply a higher maximum current rating than 10mA, but the more current you draw, the less efficient it becomes. So, you can expect a higher voltage drop once you start loading down the output. I'm fairly certain you could power a 2-3 overdrives off a single charge pump, since many OD's don't have very high current draws. But, the safest route would be to maybe use a couple of them, say one per two pedals. Since most 9v PS will deliver 100mA there should be enough to go around.

IOW, I think it require some testing...the worst that could happen is you might fry a charge pump.

http://www.diystompboxes.com/smfforum/index.php?topic=36998.0

I really like the idea of a multi-color LED, BTW. Very clever.

[JakeFuzz]

Thank you. Ill just build two to be safe then. Yeah I meant color changing LED by the way not resistor. That dual color idea works pretty well, I have it on a variable impedance thing for my wah, it warps between the two colors as you turn the knob. You need to do some math to get it right though.