A keypad is one of the most commonly used input devices in microprocessor applications. In a standard keypad wired as an X-Y switch matrix, normally-open switches connect a row to a column when ...

TCA6416A - 16-bit port, addresses 0x20 or 0x21, sig level translating. PCA9554A - 8-bit port, addresses 0x70..0x77 (PCA9554 is 0x20..0x27). PCA9535 - 16-bit port, addresses 0x20..0x27 PCA9534 - 8-bit ...

This repository contains several separate arduino format libraries, each one adding to the library Keypad external expansion port communication via an I2C (or Wire( )) port on the arduino ...

There was a time when people were happy to interact with their computer with a standard keyboard and mouse. But in recent years, we’ve noticed more programmable, custom-designed keyboards with more ...