Just put your mug on the coaster, and the weight of it activates a hidden switch, which causes ... [MakeFunStuff] paired this easy-to-use sensor with an Arduino Nano and five LEDs that show ...

We’re used to thinking of limit switches as a mechanical device that ... [Anthony] chose to use an Allegro A3144 sensor. Apparently it is no longer in production but was easy to find for ...

Something that is missing when they are bought is automatic end-stops, although the ‘Woodpecker’ control board that comes with the machines, which is based on an earlier Arduino shield ... is to use ...