Magnets (especially those ball magnets!) are endlessly fascinating, aren’t they? It’s almost dangerous to combine them with LEDs, because how are you supposed to get anything done with something like ...

Here is a simple general-purpose security alarm circuit built on the Arduino platform. It brings up an obtrusive alert signal when an intrusion/theft attempt is observed by its front-end sensor. In ...

Designed for applications where the available magnetic field is extremely low and/or the space limitations are a major design factor, the GR150 magnetic reed switch functions as a non-contact position ...

Standex Electronics has created a series of mini magnetic field sensing reed switches, optimised to control up to 10W, 200V or 500mA. Called MK33, they are bare glass surface-mount reed switches with ...