![]() ![]() I left in ~2006 and that host ran on for another 5 years before being destroyed by an earthquake. In the end I just made sure to power on the drive rack before the host. However I was dissuaded from this by management, who pointed out that mains electrical work was outside my job description and that I was not licensed for such work. Since the host was ATX based (Pentium2 from memory) I planned on using a small relay running off the Power LED connector, which would switch mains voltage on to the other unit. Any more than that and the host was booting past that part of the POST. It worked fine if the drives were turned on first, or at the same time as the board, and up to ~5 seconds after the board. It was used as a cache disk for a squid server. Ended up with twelve 3.2 GB IDE hard drives in a large AT case, which had an AC power switch. I did something similar years ago when time was cheap and parts were not. ![]() In your situation, I'd avoid the "paperclip jumper" and simply cut both appropriate lines, and join them properly with solder and heat shrink. If you do not, and the supplies are not at the same potential, then current will flow through equipment (e.g: hard disks) via the power and data cables. If possible, use the same or neighbouring wall sockets for both supplies. If you are using two separate wall sockets to power each supply, then you may introduce a ground loop, as each socket may take its ground from different points. If there is any doubt, or if this is a permanent installation, then it would also be highly advisable to connect a number of the ground / 0v signals from each power supply together. Regarding Grounding - in PCs, the " Ground" / 0v is typically bonded with Mains Earth and the Chassis, meaning that the two supplies should be at the same potential. The product pictured below is ThermalTake's AC-005-CNONAN-P1. In any case, ensure that the signals are properly isolated, and you don't leave any bare wires exposed. cutting, splicing and soldering) it may require permanent modifications to one of the power supplies - make sure you label it as such. ![]() If you're comfortable with it, then you can make one of these yourself - depending on which route you take (crimping, housings, etc. The power supply's fan may spin, and any connected peripherals should power up.Īs mentioned in the comments, if this is going to be a permanent installation, then you would be much better off using an adapter as shown below that uses the motherboard's signal to control both power supplies. This will cause the power supply to enable its main outputs (instead of just the standby 5v supply). ![]() Starting at the top left pin, and counting right, you want to connect (aka " short") the third and fourth pins (i.e: " Ground" and " Power On"). Orient the connector so that you are looking " in" to the holes (i.e: as if you were the socket, with the wires coming out of the back), and with the clip on the top. If the wires are colored, then you'll have a slightly easier time, if they are all one color (e.g: black), then be careful about which pins you use. You can turn an ATX power supply on by using the " paperclip technique".įind the 24-pin connector. ![]()
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