[sdiy] Power supply and FETS

[Atom 'Smasher']

> I've built a few modules that require a +12v -9v power supply however the
> rest of my modules run at +12v -12v as does my power supply.I've tried using
> a resistor to drop the -12v to -9v but it reads as +9v when I do this.Is it
> a case of using different value resistors from the -9v rail?If so how do you
> calculate the correct values to use?Is there something I'm missing?
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is the polarity right, on yer meter?

if i understand this right, it's the perfect job for a 7909, -9V
regulator, not a resistor.

this would work well with an easy-to-find +12V/-12V power supply.

http://www.falstaff.demon.co.uk/power.html

        ...atom

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