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The 2N2222 is a popular NPN bipolar junction transistor (BJT) used for switching and amplifying signals in electronics projects. It can handle moderate current and voltage, making it ideal for controlling motors, relays, LEDs, and other components directly from microcontrollers like Arduino, ESP32, or Raspberry Pi.

It’s a must-have for anyone working on IoT, robotics, sensor interfacing, or general-purpose circuit design.

Key Features:

Type: NPN BJT

Collector Current (max): 800mA

Collector-Emitter Voltage: 40V

Power Dissipation: 500mW

High switching speed and gain

TO-92 package for easy breadboard use

Ideal for use as a switch or amplifier

Compatible with Arduino, ESP32, Raspberry Pi, and other microcontrollers

Applications: Relay driver, motor control, signal amplification, DIY electronics

2N2222 Transistor Pinout