Open Source
In 2019, the author set out to build a quadcopter without any off-the-shelf flight controller or firmware. After four years of development, the result is a stable, flying drone based on ESP32 with open-source code that anyone familiar with Arduino can understand.
Open Source
In the tech world, many companies manufacture devices and software for them. However, in some cases, these companies fail to comply with international open-source norms, leading to violations of freedom and agreements — as exemplified by the Honor 90 brazenly violating GPLv2.
Open Source
A two-year journey of a small two-person team designing and building an open-source electric bike from scratch in a garage — from an initial trike prototype through 3D printing failures to a final 50km/h, 100km-range e-bike built on a Greyborg Cromotor hub motor.