Tag: NPN Transistor

Bipolar Junction Transistors BJTs
Active components Electronic components Electronics tutorial Transistors

Bipolar Junction Transistors (BJT) Working and Applications

Bipolar Junction Transistors (BJT) are widely used for amplification and switching purposes. It consists of three layers of doped material, forming two PN junctions. These layers are called the emitter, base, and collector. There are two main types of BJTs: NPN and PNP, which differ in the arrangement and type of charge carriers involved. Symbol […]

Water Level Indicator Circuit
Bc 547 transistor projects Electronics project Electronics tutorial Transistors

Water Level Indicator Circuit using Transistor and ULN2003 IC

Want to build a simple and effective water level indicator circuit at home? In this guide, we’ll show you how to make a water level indicator using BC547 transistors, a few LEDs, and a buzzer. This is a fun and educational mini project for students and hobbyists interested in basic electronics. Concepts Covered: Transistor Switching […]