Please see this thread: http://forums.procooling.com/vbb/showthread.php?p=125434#post125434 The idea is to use a heater - a peice of graphite, to heat heatsinks so they can be tested accuratly. The graphite has a resistance of around 1ohm although that may be increased when I modify it to make it more similar to a cpu die. Id like to run it at 12v and below and need some way of controling the heat output. To get 12v I would most likely use a pc psu as I have plenty spare capable of the current I might need. The current used and the largish volt drop possibly needed for testing at lower heat output, would probably make linear regulators unsuitable? Any suggestions/ideas of how I can power it? Also I would like the power output to be controlable to some accuracy, so maybe theres some IC's that might be worth looking at, maybe one that can multiply current and voltage to give me the wattage, that would be helpfull! However I would like to keep this unexpensive/quick to make and simple to use...
I don't know exactly how to do this but you should keep in mind that PC PSU's aren't often dead on 12.000v, and if you're going for the most accurate readings possible you would need to keep in mind that the 12v rail fluxuation would directly effect the wattage your die simulator pumps out.
hey.. i read a magizine that use their own custom rig that works well... for instance they have several different milled copper dies that can have a temp probe in them the size of a barton core or whatever... then they can crank it up to whatever wattage they want nfi how they did it though... ill try and find out...
Firehed yes I am aware of that. Idealy there will be a volt meter and ammeter measuring it. Id like some kind of intergrated chip to do all of this and even make corrections to keep the wattage the same, but I dont know if there is one capable of it
