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#USB TO PS2 CONVERTER PLUG HOW TO#
The connection between the microcontroller and the ps/2 keyboard seems straight forward enough but then from the microcontroller to USB is another story.Įdit 3: After a bit more searching I discovered that Microchip released a Technical Brief with quite a complete guide on how to do exactly what I was after! Its TB055 and includes the source code for PIC uC. It seems its a not that easy but doable task to create your interface with the use of a cheap microcontroller.
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As this was based on the original IBM PS/2 (AT) keyboards and this protocol has been carried though to today.Įdit 2: More info found on the electrical interface needed here. Although all the ' scan codes' that the keyboard sends to the system should still work with modern systems. As USB devices need to be registered and be able to give data to the OS about what it is when requested by the OS. Microphone Audio Jack Converter 7.95: 3.5mm Stereo Headphone to 6.35mm Audio Converter Adapter 8.95: USB A Female to USB A Female Converter 8.95: PS2 To USB Mouse Converter 8.95: USB To PS2 Keyboard Mouse Converter 7.95: Digital RCA AV Splitter 8.95: BNC Female to RCA Male Adapter 8.99: RCA Female To BNC Male Adapter 8.95: AV Pro. Why?Įdit: Ok so in some more research, I think I understand the why now. So after trying a basic rewiring it didn't work so there has to be some conversion going on but what? The puzzling thing is going from USB to PS/2 works but going the other way doesn't work. Though USB has a differential DATA +- and ps/2 has a data and clock wire. But I am curious as how would one do it themselves? I have tried just rewiring an old keyboard to a USB cable as they both have 5V and ground and 2 data connections. I am quite aware you can get ready made off the shelf adaptors to connect old ps/2 keyboards to USB.