This DIY gas leakage detector is designed for educational and basic monitoring purposes. For critical safety applications, ...

The concept of this DIY creation is simple: display a basic ... you'd need an Arduino Nano, a 9V battery, two LEDs (red and green), a buzzer, a seven-segment LED display, a shift register for ...

I just received my RC522 RFID reader and made this simple Arduino access control system that uses the reader, a buzzer for the alarm and a relay shield for the security system. The relay can be used ...

An Arduino Nano runs the show ... Sound is courtesy of a simple buzzer. It’s a build that doesn’t do anything wild, but presents very well. This is down to the smoothly finished and nicely ...

Arduino, the building block of many off-hours ... A knob, eight LEDs, a proximity sensor, a motion sensor, a simple buzzer/speaker, a temperature/humidity sensor, and three simple buttons.