How to use transistor as a switch :
How to use transistor as a switch in electronics circuits, how to use transistor as a switch in microcontrollers projects.In many application we need to interface transistor with micocontroller. Why we need to interface transistor with micocontroller? The reason is that microcontroller pin can’t provide output current more than 3mA and voltage more than 5V. If we connect load having current demand more than 3mA, it will burn microcontroller. Many output devices will require a transistor switching circuit to operate high current requirement load. So in this tutorial I will show you how to use transistor with microcontroller.
Video lecture on how to use transistor as a switch
Practically we used mostly relays for high current demanding loads .In that case transistor used to operate relay and load is connected with relay.I will post tutorial on relay interfacing soon.
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