In this tutorial we are going to learn about how to make our onw DIY IR Sensor with the LM324 chip. Let's get started: The purpose of this circuit is to provide a visual indication by activating an ...

Have you ever wondered how speed guns measure the speed of moving vehicles or how an athlete's sprint speed is recorded? Normally these speed sensors work with radar or laser technology to bounce back ...

[ladyada] has a freshly-published and amazingly thorough tutorial on passive infrared (PIR) motion sensors. Most often seen in security floodlights and automatic doors, in creative hands these sensors ...

Delivery driver walks down the driveway, I need fast and reliable indication of the event, e.g. Light flash, (I wear headphones all day) Use ESPresence to flash the light of any room in the house it ...

The damages that can be done by fire are devastating. To prevent causalities or damages, it is necessary to detect the fire, so that warnings can be provided and even automatic fire suppression ...