So you’re building a new mechanical keyboard. Or attaching a few buttons to a Raspberry Pi. Or making the biggest MIDI grid controller the world has ever know. Great! The first and most important ...

The 16 key matrix switches (SW5 to SW20) are placed in the 4×4-key matrix layout on the board. These switches control the outputs at port G based on the information from the keys that were pressed, ...

The key pad of most smart phones employs one of two key-scanning methods: conventional or low-EMI. By describing and comparing these methods, the following discussion illustrates a major benefit of ...