Powered by an Arduino Uno, this laser tripwire alarm project works much like those in ... to a continuous but still equally annoying sound. If you enter the right code, the alarm will deactivate.

Now it is very easy to build your own siren sound alarm, small enough ... with the help of one pre-programmed Arduino chip (Atmega328P-PU)! For more details about this, go to Arduino PWM Led article.

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 ...

Here is an ultra simple Arduino Night Alarm project wired around a handful of inexpensive and ... For example, you can make your circuit sound an audible alert (and fire a warning lamp) whenever it ...

This sensor ... The Arduino controller can be programmed to output any of the standard 12 musical notes associated with the input. Although a simple piano may not sound like an exciting project ...

When I started learning DIY electronics, using Arduino was ... interference (EMI) detector shown here. Because it converts invisible electric vibrations into audible sound, it's handy for ...

as tends to happen with these kinds of projects. For one, the sound doesn’t directly control the solid state relay used in the fan controller. When the microphone equipped Arduino detects enough ...