I MADE A MILLION DOLLAR PRODUCT FROM MY DORM ROOM

Summary from the TLDR Dev newsletter

To solve the issues of poor battery life and high latency in DIY wireless keyboards, a college student designed the nice!nano, a power-efficient microcontroller that quickly sold out and spurred the ZMK wireless firmware. This project evolved into the e-commerce business Typeractive, which now provides specialized tools to the split keyboard community, selling over 50,000 units and generating a million dollars in revenue.