How to power various DC devices from closet cleanly

mklein said:

I already have a 12v? rack-mount cctv power supply.

Some serial LCDs which I need to drive from wiring closet offer 'high' voltage option and will run from 9-15vdc. So this should work on cctv power supply unit.

But I have some devices like an iButton reader w/led that takes 2.7vdc and short of moving my bench power supply down into closet to dial in right voltage...how best is this done?

My cctv power supply wouldn't be appropriate correct?

I'm looking for something that could drive 'n' devices also.


thanks in advance.

mike

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mklein said:

Ok, so for any dc device I want to power from 12vdc cctv rack power supply...I can merely insert resistor (appropriate one) to bring voltage down to 2.7vdc.

I should do this on + side of power on cctv power supply or does it matter.

I think this reference explains it well...thanks for help.

**broken link removed**

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