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Old 10 August 2015, 13:10   #3
Mounty
Hardware Design Engineer

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Join Date: Jan 2013
Location: www.KMTech.co.uk
Posts: 372
About 100mA.

I wouldn't use a LM7915CT the losses would be too high. Instead I would use a MC34063ABN-based circuit.

It's the gubbins that makes all the difference, you'd be suprised what a few mosfets, inductors, electrolytics etc adds up to.

But why bother if no-one needs it?
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