Raspberry Pi-based Eye Catcher
A standard sand clock just shows how time passes. In contrast, this Raspberry Pi Pico-controlled sand clock shows the exact time by “engraving” the four digits for hour and minute into the layer of sand. After an adjustable time the sand is flattened out by two vibration motors and everything begins all over again.
At the heart of the sand clock are two servo motors driving a writing pen through a pantograph mechanism. A third servo motor lifts the pen up and down. The sand container is equipped with two vibration motors to flatten the sand. The electronic part of the sand clock consists of a Raspberry Pi Pico and an RTC/driver board with a real-time clock, plus driver circuits for the servo motors.
A detailed construction manual is available for downloading.
- Dimensions: 135 x 110 x 80 mm
- Build time: 1.5 to 2 hours approx.
- 3x Precut acrylic sheets with all mechanical parts
- 3x Mini servo motors
- 2x Vibration motors
- 1x Raspberry Pi Pico
- 1x RTC/driver board with assembled parts
- Nuts, bolts, spacers, and wires for the assembly
- Fine-grained white sand