TEAM MUCH MORE PSU PROBLEMS
06-27-2005 | 06:36 AM
#31
Tech Addict
Joined: Dec 2004
Posts: 635
From: GO WODONGA
helps if i attach the link:
06-27-2005 | 06:54 AM
#32
Tech Apprentice
iTrader: (2)
Joined: Apr 2005
Posts: 61
From: Albury, Australia
Hmm that whole thread hardly threw out a single fact! No way I'd be posting any info in there and getting flamed by people who didn't even do physics in school, or even a TAFE corse!
Anyways, good luck with your projects ppl.
Anyways, good luck with your projects ppl.
06-27-2005 | 08:50 AM
#33
Tech Master
Joined: Feb 2005
Posts: 1,117
From: TOO FAR
well done
Originally Posted by chipa
PC Power Supply is just one of the links you can find with google.
I'll try and help with several points here tho...
1. If you have to ask, then odds are that you should get help performing this sort of mod.
2. See those big capacitors inside? Take it as gospel that because of them you need to wait 10-15 mins before touching the PS after removing power.
3. Most power supplies are overrated. Unless you paid a lot of money when it was new (relatively) you can find that 10-15% under the printed rating might be closer.
4. a large percentage of AT/ATX power supplies require a 10-20% load across the 5V line to get the proper voltage on the 12V rail. (Otherwise you'll end up with a PS running at 11.7V for example)
5. Make sure you use decent cable. If you reuse the old cable remember that they have been bent and twisted a bit from PC usage. If you want to get 5amps+ through each wire you're on you own when the meltdown hits.
cheers
I'll try and help with several points here tho...
1. If you have to ask, then odds are that you should get help performing this sort of mod.
2. See those big capacitors inside? Take it as gospel that because of them you need to wait 10-15 mins before touching the PS after removing power.
3. Most power supplies are overrated. Unless you paid a lot of money when it was new (relatively) you can find that 10-15% under the printed rating might be closer.
4. a large percentage of AT/ATX power supplies require a 10-20% load across the 5V line to get the proper voltage on the 12V rail. (Otherwise you'll end up with a PS running at 11.7V for example)
5. Make sure you use decent cable. If you reuse the old cable remember that they have been bent and twisted a bit from PC usage. If you want to get 5amps+ through each wire you're on you own when the meltdown hits.
cheers
your 5 points spot on...
06-27-2005 | 10:19 AM
#34
Tech Master
Joined: Feb 2005
Posts: 1,117
From: TOO FAR
Aopen PSU...not the best money can buy...
but the best value for your money...so far.. 
had two 12amps continious and currently using a 15amps with another 24amps PSU on the bench.
resistors are easier to mount and better than using fans but would need much ventilation and cooling down. i personally lean on using a lightbulb cos it does not need that much cooling down. i just made sure its mounted next to the exhaust fan.
info are available to those interested....did more testing today...the 15amp unit can charge one pack at 4.5amp, run my robitronic dyno at 7volts 11amps(15sec intervals),and charge my radio pack at 12v 2amps all in one go....
had two 12amps continious and currently using a 15amps with another 24amps PSU on the bench.
resistors are easier to mount and better than using fans but would need much ventilation and cooling down. i personally lean on using a lightbulb cos it does not need that much cooling down. i just made sure its mounted next to the exhaust fan.
info are available to those interested....did more testing today...the 15amp unit can charge one pack at 4.5amp, run my robitronic dyno at 7volts 11amps(15sec intervals),and charge my radio pack at 12v 2amps all in one go....
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