I have 3 computer fans and now with my laptop overheating I thought I would use them to keep my computer cool. I have taken an old flat bed scanner gutted it and used it as a base. I have everything mounted I just need to make up a circuit. I have a power supply from some electronic gadget that has long since died but the power supply still works. Being me I like to make use of everything so I need a circuit to convert 9v 1A power into 12VDC .19 .20 and .25 A ( The fans are different sizes). Or I could just generalize the ampers at .20. Anyway so being a 15 year old know nothing I don't know really how to do this. So if anyone has an idea it would be much appreciated!