End-stops vs Encoders

[Loveny]

Seeder IR distance sensor

@roryaronson Here are some details of the distance sensor I added to the seeder. It’s an infra-red distance sensor from Sharp, on a carrier board from Pololu, this one I think https://www.pololu.com/product/2474. Here are some pictures:- [image][image] The sensor connects to the 5V/Gnd and gives an analog output which varies with the distance (between 10cm and 150cm). The output isn’t linear because it measures infra-red reflected energy, so it needs calibrating, but that’s easy enough; jus…