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Re: synthacon q power supply again, how many ma?

2004-11-04 by sasami@hotkey.net.au

>so i wanted to know how much current you guys think the synthacon
>would draw?

not much at all. I haven't measured it, but it would be under 50ma.

>the next option for parts i already have would be to create a virtual
>ground circuit with a buffer (i have buf634's) that can apparently do
>up to around 150mA. I'm sure there won't be ANY problems with 150mA,
>but I have made TLE circuits in the past but not buffer based rail
>splitters.

possible.

>so my thoughts on a powersupply are:
>24vDC plug pack -> rail splitting circuit -> regulation circuit
>(7912/7812).

forget it. You'd need 30 volts to do this. There is too much drop in the
regulators.

>the other option is:
>25vDC plug pack -> regulation circuit (lm317) -> rail splitting circuit.
>
>what do you guys think about these options??

Better option - 15 to 18V AC plugpack through a pair of half-wave rectifiers
into 78xx and 79xx.

See here.
http://www.cgs.synth.net/modules/cgs46_sba.html
_______________________________________________________________________
Ken Stone sasami@... or sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

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