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Author Topic: USB charging  (Read 2238 times)

flester

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USB charging
« on: November 20, 2017, 07:17:14 AM »
Lots of stuff is USB chargeable these days. Is it feasible or safe to build in USB charging to a diy amp or other builds?

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Enzo

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Re: USB charging
« Reply #1 on: November 20, 2017, 12:52:06 PM »
Safe?  No less safe that any other circuit you build.

Feasible?  Very simple circuit.

Make sense?  Not to me, maybe to other people.  Little plug into the wall chargers are cheap or even free:
https://www.4imprint.com/sampleitem/134168?gclid=EAIaIQobChMIzqD9itrN1wIVGLXACh0C4ACREAQYASABEgLXsfD_BwE&mkid=1pla-s134168&ef_id=Wbo0QgAABcNrZEKB:20171120174403:s

Otherwise, under $2:
https://repairpartsusa.com/dual-usb-home-charger.html?gclid=EAIaIQobChMIzqD9itrN1wIVGLXACh0C4ACREAQYAyABEgIlvPD_BwE

And I can locate those wherever I want, rather than having to go over to my stereo to charge up.

If I needed one in my stereo, and there was no convenience outlet on the unit, I might buy a cheap charger and take the circuit out of it and install that.

flester

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Re: USB charging
« Reply #2 on: December 13, 2017, 06:20:20 AM »
Safe?  No less safe that any other circuit you build.

Feasible?  Very simple circuit.

Make sense?  Not to me, maybe to other people.  Little plug into the wall chargers are cheap or even free:
https://www.4imprint.com/sampleitem/134168?gclid=EAIaIQobChMIzqD9itrN1wIVGLXACh0C4ACREAQYASABEgLXsfD_BwE&mkid=1pla-s134168&ef_id=Wbo0QgAABcNrZEKB:20171120174403:s

Otherwise, under $2:
https://repairpartsusa.com/dual-usb-home-charger.html?gclid=EAIaIQobChMIzqD9itrN1wIVGLXACh0C4ACREAQYAyABEgIlvPD_BwE

And I can locate those wherever I want, rather than having to go over to my stereo to charge up.

If I needed one in my stereo, and there was no convenience outlet on the unit, I might buy a cheap charger and take the circuit out of it and install that.
Thanks. Just worried about frying the battery or burning the house down. I found this charger circuit http://www.stufinnis.co.uk/pp3charger.html which should do the job though

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Crystallas

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Re: USB charging
« Reply #3 on: December 13, 2017, 08:54:51 PM »
What's the advantage over just using a wall charger? Seems like you increase the potential for problems(and obsoleteness) by integrating redundant features.

Enzo

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Re: USB charging
« Reply #4 on: December 13, 2017, 09:50:38 PM »
And it fits in your pocket.