As indicated, our system requires a “Logic High (H)” level input to wake up. The best sensor you can use to detect an intrusion is the Passive Infrared (PIR) Sensor. The PIR Sensor detects the motion ...

There’s a huge market for 433 MHz alarm system hardware out there, from PIR motion detectors to door and window sensors. If you want to put them to work, all you need is a receiver, a network ...

In this security system is based on the embedded system along with GSM and sensor networks. The human movement is detected using the PIR sensors.

For his sensor, [Felix] is using a Moteino, a very tiny Arduino compatible board with solder pads for an RFM12B and RFM69 radio transceivers. These very inexpensive radios – about $4 each ...

It may not be as fancy as Skylink, or even the iSmartAlarm security system. But, for the cost of a Rasberry Pi, Pi Camera and PIR sensor, you could make a couple of these alert systems and still ...