In a standard keypad wired as an X-Y switch matrix, normally-open switches connect ... connect to the column C1-C3 pinouts of the keypad Next is a project example, where the Arduino is instructed to ...

In this quick Arduino tutorial I will explain how you can control a relay using ... This voltage is used to drive the transistor that will switch ON the relay and the load (in our case the fan) will ...

This is a simple project. It uses an Android device to switch an LED driven by the Arduino. Connectivity is provided by the Bluetooth module inserted in the breadboard. But one look at the UI on ...