Reverend Jones from the Hacked Gadgets Forum has posted a creative way of making an old wall-wart (plug in power supply) into a useful USB power supply.
“Here is a quick and easy way to make an USB charger/power supply powered by the wall outlet. This can be used to charge/power a PSP, iPod or any other USB device.
First you need to acquire a regulated 5 vdc wallwart rated at 500ma or higher. The one I used is from an IoMega Zip drive. It has a switching regulator with an output of 5vdc @ 1amp.
Other parts needed:
1) 330 ohm 1/4 watt resister
1) 10k ohm 1/4 watt resister
1) 3mm LED (red, green or yellow)
1) USB-A jack, female ”
August 22nd, 2007
Useful!
I might have to make one.
August 22nd, 2007
Now to make all your 5v techy goodnesses use USB
August 23rd, 2007
Nice clean mod!
August 23rd, 2007
[…] Faça você mesmo… DIY Posted Agosto 24, 2007 Adoro o que encontro pela internet, e adoro a internet pelo que encontro. Fazendo algumas pesquisas sobre o tema DIY encontrei um site que trabalha apenas com soluções desse tipo. O site instructables ensina de muitas formas como por exemplo, criar seus próprios óculos infra-vermelhos *aqui, criar uma arma com uma lapiseira *aqui , ou criar um memory key usando peças lego *aqui . Outro site muito bom que indi é o makezine, uma revista americana que indica os melhores projetos do mês sobre todos os assuntos possíveis. Alguns exemplos são: crie o seu próprio mp3 player *aqui (é necessário comprar a placa inicial), como fazer seu carrinho de papel com estilo retrô *aqui ou criar seu carregador usb que liga na tomada *aqui . […]
August 24th, 2007
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June 30th, 2008
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June 30th, 2008
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July 4th, 2008
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July 17th, 2008
this is my first time to do some inrush current research in USB power supply.So give me some basic
information of USB power supply,please.
July 17th, 2008
in tha above photoes,there is no thermistor resistance component.
i guess it is not a good USB power supply.
July 27th, 2008
Just out of curiosity, what are the two resistors and the LED for? I looked through the article and they’re never mentioned.
July 27th, 2008
The 330R resistor is the current-limiting resistor for the LED. The LED and resistor are wired across the supply as a power-on indicator. Not sure on the 10K resistor…