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Components I used: C1815 transistor 220 ohm resistor 500k ohm potentiometer 12v source Discover how to use a BJT NPN transistor in this easy to understand tutorial. Learn the fundamentals of electronics as we walk you through the basics to get the most out of this essential component. From how to identify the legs to how to connect it in a circuit, this video gives you a step-by-step introduction so that anyone can understand and apply the use of transistors in their projects. Don't miss this practical guide and start mastering electronics today!