If you're messing around with floppy drives, or disk drives, or other devices that are usually powered with a PC motherboard you'll often see these big 'Molex' connectors used to provide power. They are used to give 5V (red), 12V (yellow) and ground (black) and with this connector you can easily wire up your favorite power supply or bench-top power source.

We also carry the socket cable here.

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