Free wheel sensor

Idea

Add a rotation sensor to the free wheel to detect motion over ground of the mower and thereby detecting obstacles.

Photos

Videos

Principle test https://www.youtube.com/watch?v=SGfPwGnzHT4

Outdoor test https://www.youtube.com/watch?v=UbwwP1jQigM

Required components

• Arduino Nano (placed into printed 3D part)
• HMC5883 compass sensor (placed into printed 3D part)
• 4 ball magnets
• printed 3D parts

Download

Note: the sensor simulates an Ardumower bumper (and will be connected to the PCB bumper pin): when no motion is detected, a bumper press is simulated.

Forum

https://www.ardumower.de/index.php/de/forum/sensoren/1603-sensor-fuer-das-stuetzrad-free-wheel#14955