Using Transistors as Switches: A Complete Engineer’s Guide
Published by LogicHobbyist Automation Lab — From blinking an LED to switching industrial solenoids. Learn how to use NPN and PNP transistors as reliable electronic switches with real‑world examples and interactive simulation. 1. Why Use a Transistor as a Switch? A microcontroller (like Arduino, ESP32, or Raspberry Pi) can only source or sink a few … Read more