Apart from my IT security work, horses and cats I do love Arduino, Amateur Radio, SDR and a bit of brassy Steampunk.
The single coil is used as magnetic sensor and actuator to detect and drive the magnetic pendulum. An Arduino acts as interface. It is controlled by Snap4Arduino running on the laptop.
This yagi is made from an old venetian blind. I was able to receive the first beacon signals of UKube-1 on its very first orbit right after launch over Scotland.
A thermoelectric generator made out of nice brass and copper things from the recycling place (Apart from the thermoelectric element). It generates enough electricity for a high power LED.
Footfall counter using OpenCV / Python to detect and count the faces of visitors. A Toshiba VFD is used as display and a speech synthesizer welcomes the visitors. The system was demonstrated at the Orkney Science Festival 2015.