Single color LEDs soldered in form of a cube. Every LED is addressable.
A modified pizza oven to solder SMD components onto a PCB.
You can turn a cheap ultrasonic sensor (SR(F)04 or compatible) connected to an Arduino into a fully functioning I²C ultrasonic sensor.
A test of different solder mask solutions. Only the UV curable solder mask is documented yet.
I study Electrical Engineering and Information Technology at ETH Zurich.