Magnetic contacts are one of the basic components of electrical security and distress alarm systems (they are mostly used in securing the object and therefore are only used partially – in the alarm ...

This project aims to give you a modern and complete IoT door alarm to deploy on your esp32. It has been built with esp32-arduino framework. It is based on the Magnetic Hall effect, which is why a ...

The iron core increases the coil’s magnetic ... switches and door locks that can be controlled remotely; to hold open fire doors – the electromagnet switches off when a fire alarm is sounded ...