DIY Hacks & How To's: Pocket Sized Power Supply

[spokehedz]

Good gravy this is GENIUS. I cannot tell you how many times I have bought broken toys from thrift stores and this would have saved my bacon many-a-time.

[achemachew]

Nice! The only thing with this is people are afraid of what they don't understand and might think you took the circuit board out of the device your testing, or think your trying to corrupt it in some way.

[timwatson]

Surprised you did not put an LED power indicator on it.

[DoctorBlankenstein]

KILLER IDEA! Well displayed.... people will build this

[RyanJensenEE]

Interesting Idea. This looks very handy. And much easier than carrying around a benchtop power supply everywhere xD

[iamthefoetus]

Making myself one of these this weekend, thankyou for sharing.

[isupermandude]

Pretty handy, easy build. I LOVE IT!!

[coondogtheman]

Could this be done with the guts from one of those AC adaptors that have multiple voltages?

[Flofy]

I can't say how Awesome this is :D

[jimatohno]

AFAIK you can. Notice how the resistor array is hooked up to the voltage regulator. The resistors aren't what carries the output voltage, the resistor array's job is only to act as a voltage divider to adjust how much power the regulator will output.

[VitekSTZero]

Very efficient by the way.
For battery powered stuff, linear regulators are tabu (at least by my opinion).

[lifesglorydead]

there's two filter caps on either end of the regulator, that's generally about all you need for this kind of power supply

[MarcoMardegan]

Two caps aren't the protections, they are in the circuit for levelling the voltage and give instant power to the load.

You need at least a diode and a resistor to make sure you can't broke your circuit and, when you switch off the unit, the charge in the capacitor can flow in the opposite way so you can damage the voltage regulator... but i prefer a switching converter.

Sorry for my english, bye.

[jjqformerlyjailbreak]

Those Paco’s were my favorite 90s jeans.

[Checkthisup]

I was thinking about the same thing myself. Good point.

[TheGTA]

this is a really good idea, i goingto make one like this, thank you :D

[valcor]

I know you listed 7-270 ohm resistors, can i use 7-220ohm 1/4w resistors instead?

[sonicase]

pretty good idea however your circuit shows electrolytic capacitors and you built it with nonpolarized, ... might still work for this project but i'd check to be sure

[UberAlphaSirus]

Yup, but the voltage would be a little bit off.Shouldn't make much difference with battery powered stuff.

[spokehedz]

That might also work, depending on how they get the AC to DC voltage, and how they get the DC down to usable battery voltages.