College freshman built nice!nano, a wireless keyboard microcontroller that became a million-dollar DIY hardware business

The author recounts creating the nice!nano, a wireless Pro Micro-compatible microcontroller, after being frustrated by poor Bluetooth keyboard performance. Designed during freshman year, the board went on to power tens of thousands of DIY keyboards and become a million-dollar product.

The story shows how niche maker communities can turn focused hardware fixes into meaningful businesses when existing products leave clear gaps. It also highlights the growing value of open hardware ecosystems, where compatibility and community adoption can matter as much as traditional distribution.

I made a million dollar product from my dorm room (2025)