The easiest and safest way to detect mains electricity using a microcontroller is with an optocoupler as it allows us to send data between two galvanically isolated circuits. ... mains electricity. It ...

The soil moisture sensor module , built around the LM393 comparator, gives an active-low (L) level output when the soil is dry (determined by a pre-setted threshold value). This digital output (wet ...

The Pressure Sensor Module incorporates a material called Velostat with the Arduino. This material adds more resistance when more pressure is applied to the material. This module also uses the RGB LED ...