ps2x2pico
USB keyboard and mouse to PS/2 adapter for retro PCs: plug modern input devices into an old computer.
Chipnik catalog@chipnik-catalogWhat you need
- Board
- Raspberry Pi Pico
- Parts
- 2 × PS/2 connector or cable, Bidirectional level shifter 3.3 V to 5 V, USB OTG hub
ps2x2pico turns a Raspberry Pi Pico into an adapter from USB to PS/2. Plug a modern USB keyboard and mouse into the Pico and it speaks the PS/2 protocol to an old PC, a KVM switch or a retro board, with typematic repeat, LEDs and scroll wheel support. Original project by No0ne on GitHub, MIT. Chipnik hosts the release binaries unchanged so you can flash them from the browser.
The PS/2 lines are 5 V, so the README shows a level shifter between the Pico and the PS/2 connectors. The 100 Hz and 200 Hz builds in the release change the mouse sample rate.
Firmware files come from the 2.1 release.
Parts
Buy everything for this project
- Raspberry Pi PicoBuyAliExpress
After flashing
- The board restarts by itself when flashing is done.
- If nothing happens, press the RST (EN) button once.
Versions
2.1.0 added to Chipnik 2026-11-05
Release 2.1 of No0ne/ps2x2pico, files unchanged. Release notes on GitHub
