Additionally, he was looking for a compact alarm clock he could take on the road, rather than relying on the one in his hotel room. Inspired by other binary clock projects he has seen over the ...

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 ...

If you're looking for a cheap way to keep your home safe, DIY burglar alarms could be the answer. While most families would want a burglar alarms, they can be too pricey. Professional systems can ...

Sensors stick on with adhesives, and cameras attach with screws. You can monitor DIY alarm systems yourself or pay for monitoring. Are DIY security systems worth it? DIY home security systems can ...

This is the raw analog ouput signal of the detector. Black lines in the upper area represent electronic noise, detected signal pulses from the natural radioactivity of potassium (isotope K-40) are ...

The best DIY security systems in our tests protect your ... systems with optional professional monitoring: Dispatchers at alarm-monitoring centers immediately notify you and the police when ...

int PIR_PIN = 3; // Pin number for the PIR sensor int LED_PIN = 5; // Pin number for the LED pinMode(PIR_PIN, INPUT); // PIR_PIN is set as an input for the sensor pinMode(BUZZ_PIN, OUTPUT); // ...