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| Thread ID: 17512 | 2002-04-06 06:40:00 | Power Supply Problem | Guest (0) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 42210 | 2002-04-06 06:40:00 | Hey guys, I have a spare AT tower power supply lying round that I would like to hook up to a car amplifier (+12V) but dont know how to wire the power supply up to actually go. I would like it as a stad alone kinda thing, just plugged into the wall. I know the unit wont go because of the PWR_OK or POWER_GOOD singal??? Anyone help? |
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| 42211 | 2002-04-06 08:31:00 | if its a ATX psu then go to www.burnoutpc.com for a AT psu all you need is the switch to go in plase of the switch of an AT case. |
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| 42212 | 2002-04-06 08:44:00 | Most power supplies won't start without a load on at least one output so initially your AT may appear dead even after you apply power. Most times the fan won't even run. Any reasonable load will do to verify operation and I use a 12 car tail light bulb (with flying leads) as a quick 'n easy visual load. The average computer supply will run most car audio products provided you don't expect too much power out. If you are concerned about the PG (power good) connection, tie it to one of the 5 volt lines. That's what they do in cheap PSUs anyway to ensure that the motherboard gets a PG signal. Cheers Billy 8-{) |
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| 42213 | 2002-04-07 03:38:00 | The Power OK signal is generated inside the PSU. It tells the computer that the power should be OK. It should also be dropped a few mS before the output power goes off after the mains is removed. Lack of PowerOK does not stop the supply; it indicates that the supply is stopped. Those that need a minumum load usually want a load on the 12V supply. Old Compaqs actually had a power resistor bolted in the slot for the second floppy drive/hard drive. If the second floppy (or a hard drive) was installed, the resistor was not needed. Just watch the insulation around the power switch. AT supplies have 230V mains on the switch, not 5V DC like the ATX supplies. As a bench supply, I like the old IBM ones, with the power switch inside the PSU case. |
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