2N2222A NPN Transistor

The 2N2222A is a <mark>versatile NPN bipolar junction transistor (BJT) widely used for general-purpose low-power amplification and switching</mark>. It is a staple in electronics and hobbyist projects for driving relays, small motors, and LEDs from microcontrollers like Arduino.

Pinout (TO-92 Package)

When looking at the flat, printed side of the transistor from left to right:

1. Emitter (E): Drains the current out.
2. Base (B): The control pin that regulates current flow.
3. Collector (C): The output pin that carries current toward the load.