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geekhack Projects => Making Stuff Together! => Topic started by: ThePolarCat on Fri, 20 May 2022, 17:27:17

Title: Ps2 to USB
Post by: ThePolarCat on Fri, 20 May 2022, 17:27:17

Hello,

I have an old Ps2 keyboard that I like and i want to convert to usb, I looked up the pin out of ps2 and usb, and wired it correctly.
When connected, the LEDs light up for a second then nothing happens, the computer doesn't receive the input.

the ps2 cable have 5 wires not just the usual 4 (5v, Gnd, Data, Clck) the fifth wire is white and on the other end all 5 wires are crimped into RJ12 plug.

Does anybody have any ideas why its not working and what the fifth wire is for?

Title: Re: Ps2 to USB
Post by: Leslieann on Fri, 20 May 2022, 17:30:23

Was it designed for PS2 and USB or was it just designed for PS2?

If it's only meant for PS2 it will not work with an active adapter, not a simple wire change.

Title: Re: Ps2 to USB
Post by: ThePolarCat on Fri, 20 May 2022, 20:25:33

I don’t know how I can tell if it’s ps2 only but, from its age I can assume it predates usb

Title: Re: Ps2 to USB
Post by: Tactile on Fri, 20 May 2022, 22:57:07

Just changing the plug won't work. You need to convert PS/2 signals to USB. You can build your own (https://geekhack.org/index.php?topic=17458.0) or buy a ps/2 to USB convertor.