The Kotkot machine was developed while working as a hacker for the Tovari Marketing Agency. It consisted on a machine that used an ultrasonic sensor to detect the presence of people in front of the machine, in order to play chicken coop sounds. This slide (hand drawn by me) was used to pitch the idea to the client.
The idea consisted on placing this on the supermarkets, on egg storing shelves, in order to increase the sales of the brand. The case was 3D printed, and all the components used were off the shelf, including the Raspberry Pi, all the electronics and the ultrasonic sensor.