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How do I use this PSU/ should I? Answered

While ripping apart an old printer I found it had a nice looking "+5V/1.5A, +12V/3.5A" power supply. I tried searching for a data sheet, but couldn't find one. Here's a picture of it (top right). It's an "open frame power supply unit " made by APD, but they don't even list my model (APD-6018-50A1).

Anyway, I tried plugging it in (careful not to get electrocuted of course) and seeing if it could run a large DC motor from the +12V, nothing happened, even when I tried it along with a 10ohm, 10Watt power resistor.

It has some additional pins and I thought some of these might need to be shorted, like the green signal wire on an ATX supply, so i tried shorting the sets of pins, and one of them made the motor jump, but then it just kept "ticking" every half second or so; go, wait,go,wait, etc.. Un-shorting and re-shorting the pins makes it jump then tick again.

Any ideas how to get it working, or should I stick with a hacked ATX PSU for my robotic power needs (automated airsoft turret)?

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steveastrouk

8 years ago

Either you need load on the 5V rail, or the motor is pulling too much current on startup, and the PSU is going into protection.