My Charger Project

This is my self built “charger- power supply”. It was built from an old computer powder supply and two postage stamp intergraded circuit chargers from eBay. (SOS for ICs, see links)

http://www.ebay.com/itm/5V-Mini-USB-1A-Lithium-Battery-Charging-Board-Charger-Ultra-Small-Module-/261043881158?pt=Battery_Chargers&hash=item3cc76d84c6
http://dx.com/p/mini-usb-1a-lithium-battery-charging-board-charger-144856?item=49

To increase its functionality I added two 5V USB power outlets and a 12V Car power outlet. It now charges LiIon Batteries, Phones, Cameras, GPSs, and what ever!

I have built a four-way USB PSU from the following bits off Ebay.

I have mounted two of these back-to-back separated by a 20mm square timber frame…

http://www.ebay.co.uk/itm/280930035786?ssPageName=STRK:MEWNX:IT&\_trksid=p3984.m1497.l2649

This (four-way) USB distribution board is fed by a 5 Volt , 4 Amp switch-mode power supply unit.

http://www.ebay.co.uk/itm/300746555839?ssPageName=STRK:MEWNX:IT&\_trksid=p3984.m1497.l2649

The PSU has a fine tune potentiometer to adjust the on-load voltage … Mine is set to just below 5 volts.

I can use this to charge up to four USB items at up to four amps total load … I mainly use it as a PSU for my four cheap Li-Ion charger boards … It works very well.

Nice work !

Whats purpose of these two switches ? Charging current change or cell select ?

There is a “d” which make Power -> Powder :wink:

Welcome to the BLF.

Here you go:

Pavithra_uk! Thanks! Yes, I see that “d” now. That explains why that old computer went up in smoke.

The slide switches are off/on switches for the two IC charger boards. The 12V and 5V receptacles are powered with the computer pow(d)er switch and then the slide switches power either or both ICs chargers.

Might add the holes above the switches are access holes to see the charger status LEDs mounted inside the enclosure. The 4 battery tray was rewired and is now 2 independent trays.

This was all put together with what I had lying around, except the IC boards.

Thanks Chicago X, this is my first post. I’ll learn.

That's really nice, Whopist!

I want to wish you a warm welcome to BLF, whopist!