Now it is very easy to build your own siren sound alarm, small enough to be carried in a garment pocket. This powerful audio-visual alert device is realized using the renowned Arduino platform. The 9V ...

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 ...

Using motion detectors and an Arduino ... Here is the circuit for the Sparkfun Active Low style sensor. PIR Pin “+” connects to Arduino +5 one side of the 10K Resistor Connects to Arduino ...

The project utilizes an Arduino Mega micro-controller, which serves as the brain of the device. The SparkFun Sound Detector is used to capture sound levels, converting them into electrical signals ...

Compared to the simple diode needed to demodulate AM radio signals, the detector ... circuit generates the pulses at the zero-crossing point, a low-pass filter cleans up the signal, and a cheap ...

One of the essential parts of any home security system is a door detector that lets you know ... The system here uses a cheap Arduino board, a few sensors, and a magnetic contact switch.