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Nikolai
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  • 2 weeks later...

no, but there are gazillions of 5V and 12V supplies courtesy of the computer industry, and very cheap if you look in the surplus and secondhand/ recycled market.

Then simply use a three terminal regulator (7809)  to provide 9V from the 12V rail.

If its a low power circuit (which I suppose is what your talking about re SID) then a 12VDC plug pack could feed 5V and 9V regulator ICs.

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What Duggle suggested is exactly what I have done. I have a 13.8V supply available anyway so I feed a 7809 with 100uF smoother and 2*100nF antiparasitic caps, the output feeds the 9V rail and also feeds the input of a 7805 with similar caps, output of 7805 feeds 5V rail. Downside is that the 7809 is carrying full current for both the rails but with suitable heatsink is good for about 1A which is much more than needed.

Dave

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