Transmission1

You could try diodes for dropping the fan voltage... less heat!

Yes i could have dropped the 3 volts with a few series diodes, but the fan is only about 120 mA total and with the single series resistor it runs cool to the touch. It was a 4 lead fan so pwm, but its fine running fixed speed on the 2 wires needed to spin it up, its about the same speed as if the pc was in use, fairly quiet. I could of stuck another 2 lead 92mm fan in it, but its got to stay a bargain to covert.

Mine turned up today.

stripped down

ok... im going to de solder the output pins but i want to replace them with some kind of psu type terminals.

any ideas of what i could use?

Depends, I'd try to solder a bus bar onto it.

thats what i thought cjay.... iv mannaged to get all the pos and neg terminals off so iv got a clear view of the board bottom ant top..

il take a pic tomorra

like this...

Nice.

If I could guarantee there are no tracks inside the board around those points, I'd think about exposing the copper on the board, drilling through the board and soldering a few machine screws to it, then you could bolt the bus bar to it, use a few shakeproof serrated washers.

You could scrape all the solder resist (green stuff) off so that you can solder bigger terminals onto it, a xacto type knife will do, or burnish it with a dremel - just be careful not to scrape the copper.

Even if it as a multi layer board I cannot for the life in me see anyone putting any tracks between the power pins on an other layer as there would be no need so I would be tempted to drill bigger holes - you can always inspect them with a magnifying glass afterwards to see if anything had been boogered up.

Neither can I, the only thing I can think is that there may be a sense connection but I agree that's unlikely

any suggestions as to what i can fit onto it?

What will the maximum current per device you'll be drawing from it?

I'd go with the bus bar and tap that to accept machine screws for fixing crimp eyelet/ring terminals as well as a few heavy duty binding posts.

TBH, no more that 25-30 amps in total lol

any links to the bus bar your referring to cjay?

Assuming that those pins are 0.1"/2.54mm then you could go with something like: http://www.toby.co.uk/content/catalogue ... ies=PCB-10 (this one is the wrong pitch, but Toby do samples).

I can't find a busbar with 2.54mm pitch that's solid bar, perhaps cjay knows of some.

You could go with spade terminals http://www.toby.co.uk/content/catalogue ... ategory=26 to get to big power connectors.
Or binding posts if you can find some big enough for the current.
http://www.digikey.co.uk/product-detail ... ND/5028401 are 36A