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Unread 07-08-2001, 05:11 AM   #2
GuyBFF
Cooling Savant
 
Join Date: Jun 2001
Location: Winnipeg, MB, CA
Posts: 242
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I'm from Canada so I'm sure you can find a better price locally.

The DigiDoc however is very capable. I think I'm the first to do this but you heard it here. Theres a couple tricks with one:

To get the DigiDoc to keep the fans running at a lower speed when the system is cool, use a LM317T (around 1 amp, 12w capacity $2) voltage regulator (add a small heatsink for $1), a 220ohm resistor $.5 and a 2k potentometer $1, wire up the voltage regulator and then connect the output wires of the circuit to the fan, as well as the digidoc to the fan. This way you can manualy set a low voltage to keep the fan runnig, and have the DigiDoc crank it up when needed. Reason I use a voltage regulator is it doesnt't limit current during fan startup (like a rheostat) so you can set the fans low and know they will start and when the voltage exceeds what it's making, it just won't add any more current (so theres no flow of current into the DigiDoc).

Secondly, you can use another channel and a relay to make a shutdown failsafe. Just place a relay on the power button, and have it close when the system overheats (make sure windows is set to shutdown, not standby) or you could probably run it to the power-good ATX wire.

I like the DigiDoc, and there really reliable, but I'll have to see these Digital Baybus' before I can comment on them.
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