The simplest possible step-down circuit is a resistive divider. Drive your 5V output into a chain of resistors, from which you tap your 3.3V logic input. A chain consisting of a 2.2k and a 3.3k ...

Upload the source code to the ESP32. Assemble the circuit on a general-purpose PCB. Fix all seven LEDs on the PCB, including ...

Toshiba is aiming at UART and SPI interfaces with three four-channel dual-supply level-translator-transceivers. "The bus ...

Of course, in real life, the output won’t really be that sharp, but it will be fast and compatible with other logic signals. In practice, you might use a Schmitt trigger to read an RC circuit or ...