Posted: 10:38pm 21 Mar 2006

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I wish I found this link a couple of weeks ago when I had to modify a couple of power supplies for my router. I ended up taking a similar approach anyway, but this would have saved me rattling my brain for an hour. The modification increases the 12v 8amp output to 13.8 volts 8 amps, perfect for battery charging. I modified mine to just over 14 volts.

http://www.qsl.net/aa3sj/Pages/PC-Supply.html

Note if you want to connect 2 power supplies in series ( Like I did to get 29 volts ), you need to isolate the 0 volt ground connection ( black wire ) on the 2nd power supply.

Glenn

Posted: 10:54am 27 Mar 2006

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Thanks for that link Glenn  it looks a heap easier way compared to the siliconchip conversion they did a couple of years ago. Next time I'm down the hill I'll have to get meself a couple of puter power supplies and give it a go but I do have an old power supply I got made about 10 years ago that outputs upto 60 volts at about 10 amps off memory. It's basically a huge transformer, a few rather huge caps and a variac with fuses installed and a 70 volt analogue guage to set the volts. This power supply was originally made for my tape drive motor which is nearly ready to go up as a wind genny. I reckon it could make a neat battery charger which I'll cerntainly need for my shed array's when winter sets in. That's if I'm home and not away working 4 weeks out of 5.

Cheers Bryan

Posted: 01:35am 31 Mar 2006

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  Chris said  

Wow 60volts 10 amps!!

Thats a crap load of power!

Hiya Guy's,

               Here's a pic of that power supply I mentioned above. As it's overcast today I'm going to power it up and give my 2 array's in the shed a bit of a charge.