After this tedious step, he designed a PCB that hosts an Arduino Nano to accept input, two MCP23017 GPIO expanders to give it enough outputs, and CD4066BE CMOS switches to trigger the connections.

Without any delays, here are the best Phones with Ultrasonic Fingerprint Sensors (June 2025) that make the cut: ...

Fingerprint sensors, for example, have progressed to being embedded beneath the display; we've listed some of the best smartphones with in-display fingerprint sensors that unlock quickly.

ESP8266-TinyConfig is a lightweight library that simplifies configuration management for your ESP8266 projects. 🌟 With its easy-to-use API and JSON storage, you can quickly manage your settings and ...