I try to document the various experiments and projects in the fields of programming, telephony, communication, mechanics, optics, electronics, and robotics as thoroughly as possible. Since I use the Fischertechnik construction system for many (mechanical) experiments, many articles find their way into the (German-language) engineering magazine ft:pedia.
Projects often result in a video on YouTube. Most of the PCB designs, schematics, and documentation for the electronics projects can be found on my GitHub account. I usually upload the 3D-printed objects I design to my accounts on Printables and Thingiverse.
Many popular sensors and various peripheral devices are connected to the microcontroller via the I2C bus these days. However, there are several different connector systems in use, and they are certainly not all interchangeable or compatible with one another. Since I wanted to be able to connect sensors to the fischertechnik TXT4.0 Controller (with a 6-pin flat cable connection) just as easily as to the various ESP-32 and Arduino boards I use, I designed a universal I2C hub that increases compatibility between the connection systems and can directly supply power to the connected sensor.
Incidentally, this project also provided a good opportunity to map out the various I2C connector systems and to expand my ability to assemble PCBs with SMD components myself. Read more....