Now, thanks to the work of [Jonathan Armstrong] we have such a firmware for the 433 MHz magnetic door and window sensors that you can pick up on AliExpress for $4 USD a piece.

This article describes how I have set up a simple “door-sentry” at home. The door-open detector is designed to alert you to an unauthorized entry in a confined area. It uses a little ATtiny85 ...

Using a magnetic door sensor to detect the speed, and a potentiometer mounted with an obscure Lego construction to the handlebar, it’s at least on par with the shopping cart handle — but judge ...

Magnetoresistance ratio enhancement opens door to highly sensitive magnetic field sensors Date: December 20, 2018 Source: American Institute of Physics Summary: By creating a new multilayer ...