The GPIO expansion is useful in any application for the number of GPIOs on a microprocessor is not sufficient. The relatively small numbers of GPIOs on microprocessors are becoming a limiting factor ...

Driving multiple LEDs with one microprocessor GPIO pin is a well-known technique. Typically, designs perform this task by issuing pulse widths and clocks of differing durations and employing multiple ...

Espressif yourself.

Raspberry Pi Pico microcontrollers come with a variety of different features for a few bucks, and a few interesting differences between generations.

This application note explains how to use a microprocessor’s UART to implement a 1-Wire® bus master. It includes an explanation of the required electrical interface, UART configuration, and timing ...