An LCD screen and a Raspberry Pi run a console app that shows the tape status, ... (I paid < 50 cents for each linear Hall effect sensor) and complexity (i2c vs single ADC pin for each sensor) ...

A Raspberry Pi and a Hall effect sensor did the trick. At least for the raw measurement. But it still left the question: how much distance is a hamster marathon?

A Raspberry Pi-powered sensor can help you detect inaudible sounds from your surrounding area. Written by Liam Tung, Contributing Writer March 23, 2018 at 5:36 a.m. PT. AR + VR.

Philip Gutjahr is using a Raspberry Pi 5 to power his Sensorpack project which features an array of sensors that are super ...