The alarm activates in ten seconds once pressing the A button. For police work objects it uses associate unhearable sensing element, and once the alarm detects one thing a buzzer starts emitting a ...

This project demonstrates a simple Buzzer Alarm System using a Passive Infrared (PIR) sensor. The system detects motion and triggers a buzzer alarm when motion is detected. This can be used for ...

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 ...

Here is the circuit of an Arduino-based Panic Alarm! The wiring is very simple so that even a novice can construct this interesting circuit without any difficulty. Arduino is a family of ...

A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. This type of equipment is used to detect a gas leak or other emissions and can interface ...

At the beginning, I wanted to build a 7 segments clock with Arduino . . . I found on Internet the little TFT screens (2.2’) able to display anything at very low price. But what to do first ? This ...

Keeping track of things like the temperature, humidity, and smoke level in your house is important. If you want to make your own system for doing so, Instructables user ICStation shows off how to use ...