Hank Fletcher
New Member
Argh! I'm having a heck of a time trying to post my question! Anyway maybe this will work:
I searched the net for some ideas on how to use a computer supply as a bench supply, and finally followed this guy's notes:
http://web2.murraystate.edu/andy.batts/ps/POWERSUPPLY.HTM
They're pretty good notes and I tried to contact him with my problem below, but I've yet to hear back.
My problem is with the resistor. I used a 10W, 10ohm resistor as is commonly advised, albeit mine is the green, cylindrical wirewound type. It gets really hot, and although I haven't use any heatsink compound the resistor is well ventilated. The supply works for about ten minutes while the resistor gets hotter and hotter, then shuts down. This hasn't fried the resistor yet, which still indicates 10ohms after it's cooled down. Then you can turn the supply on again and watch the whole thing over... but presumably this is eventually going to cook something permanently.
Thanks!
I searched the net for some ideas on how to use a computer supply as a bench supply, and finally followed this guy's notes:
http://web2.murraystate.edu/andy.batts/ps/POWERSUPPLY.HTM
They're pretty good notes and I tried to contact him with my problem below, but I've yet to hear back.
My problem is with the resistor. I used a 10W, 10ohm resistor as is commonly advised, albeit mine is the green, cylindrical wirewound type. It gets really hot, and although I haven't use any heatsink compound the resistor is well ventilated. The supply works for about ten minutes while the resistor gets hotter and hotter, then shuts down. This hasn't fried the resistor yet, which still indicates 10ohms after it's cooled down. Then you can turn the supply on again and watch the whole thing over... but presumably this is eventually going to cook something permanently.
Thanks!
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