This Encode Disc is tested with the panBot.

https://www.thingiverse.com/thing:5224737

To find out how far a robot has to travel, you can use an encoder disc. This has a certain number of grids (here 12 and 20) with the help of which you can determine the rotation. The more grids the more precisely you can control. With 20 grids, we have a distance of 10.4 mm per grid that the robot travels.

Sample Code:

Calibration Lattice 12: https://makecode.microbit.org/_h3z90uEqsdmz Calibration Lattice 20: https://makecode.microbit.org/_b9pPp7RhzKCE Sample Code Lattice 12: https://makecode.microbit.org/_Vshe68K9VfrJ Sample Code Lattice 20: https://makecode.microbit.org/_EjrRK2a0hHxy

Videos:

https://youtu.be/w4koev-kTO8 https://youtu.be/uXeBTf7sggU (Sample Code Lattice 20)

The print of the disc is required. Furthermore, you need a sensor that recognizes the grid and sends a pulse to the controller. https://www.amazon.de/gp/product/B07TZ78N8W/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Connection:

VCC -> VCC GND -> GND Digital Output -> P0

Distance between 2 Frontwheels: 130 mm Scope oft the Wheels: 208 mm