Rewiring the 4-pin power cable is a much more feasible proposition than rewiring the ribbon cable, if you can't find what you need ready-made. These cables used IDC (insulation displacement) connectors which are crimped, not soldered, and they only work as designed with the correct size ribbon cable. These are likely to be more reliable than trying to wire a 5.25 connector onto a 3.5-sized cable by hand. You can get ready made cables with both 5.25 and 3.5 connectors, for example (and of course from Ebay also). The connections on the 34-pin ribbon cables are identical, but the size of the connectors are different. Cabling is not my area, so others might provide you with better information. The converter might be a bit hard to find because most people who needed a converter needed the opposite thing (plug a 3.5″ drive on a 5.25″-only power supply). The electric characteristics are the same, it’s just a pin converter.īe careful to get the right “direction”: you need a male 3.5″ style to “molex 4 pin” female. You will probably need an adapter cable for power. Power supplies typically provided both sets for choice of device. I’m learning that it is commonly referred to as “Molex” but that’s a company name. There was another older connector type that was wider, with four tubular thick pins in a line. There might be, and I just don’t remember. I don’t remember seeing a 5.25″ drive using the compact power connector pictured there. You might have an issue with the power though. It was a common upgrade to replace the second 5.25″ drive on an older machine with a 3.5″ one, so you could have a choice of format depending on your needs. The data pin-outs are the same, assuming a reasonably “new” 5.25″ drive, not an early ‘80s model.

Floppy disk adapter to usb