RE: C64 TOWER _________________________________________________________________ From Lorax Date Fri, 06 Mar 1998 20:31:48 GMT On Fri, 6 Mar 1998 bo@prismnet.com wrote: > However, there is some cheese. In order to get the 9V I needed for the > C128 motherboard, I actually mounted a C128 power supply inside and hooked it > off the same switch as the PC power supply. I even insulated the extra PS > against any sort of radiations and added a little fan to boot. This strikes > me as awful though, and I've always hoped to get better ideas from someone. > Does anyone know a power supply maker that makes 5V/9V/12V power supplies > that fit in tower cases? If not, is it possible to pull one of the 5V up or > a 12V down with some simple circuit? I know nothing of power supplies... First of all you need to check if that 9V is DC or AC. On the 64 the 9V from the power supply was AC current and I expect it will be on the 128 too but I've never put the tester to mine. If it is then you will never get it from a PC power supply because these deal stictly in DC current. The only way you would be able to do that would be to actually go inside the PC power supply and tap voltage from in between the transformer and the rectifier. Depending on the transformer you might be able to tap any desired voltage off of it and that could be all you need for the 9V AC. If by some chance it is DC then yes you could take a 12V DC line and build a simple voltage divider with a few resistors that would take it down to 9V DC. > Anyways, my other big issue is power for the RamLink. It needs constant > power, but it strikes me as silly to actually mount the little transformer > in there... and an external port just for this power supply seems silly too, > and yet that's all I can think of. Any other ideas? I'm not familiar with the RamLink or it's power requirements but I'm guessing it probably takes 5V DC. If so why can't you just take one of the power plugs from the PC power supply and use that to power the RamLink? "For our hope lies in the dreamers. All the inventors, engineers, and builders can not create anything until it has first been imagined." -- Ma. Robert Helimand --