If you want to add a keypad to your Arduino project, the options are pretty limited. There’s that red and blue 4×4 membrane we’ve all seen in password-protected door lock projects,… ...

The Arduino project was born in 2003 at the Interaction Design Institute Ivrea in Ivrea, Italy, to provide a simple path for non-engineers to create complex devices with sensor input and actuator ...

At the heart of many amateur radio and other projects lies the VFO, or Variable Frequency Oscillator. Decades ago this would have been a free-running LC tuned circuit, then as technology advanced i… ...