Relay Driver Using Pnp Transistor. Going from a back view the first lead is the emitter the second lead is the base and the third lead is the collector. When uses as an amplifier the dc current gain of the transistor can be calculated by using the below formulae.
A relay switch circuit can be designed using npn transistor. Basic transistor relay driver actuated on low input pnp this circuit will actuate the relay when the input goes to logic low. When the base voltage of the transistor is zero the transistor will be in cut off region and acts as an open switch.
Here the ground refers to the negative line for an npn and the positive line for a pnp bjt.
Going from a back view the first lead is the emitter the second lead is the base and the third lead is the collector. Going from a back view the first lead is the emitter the second lead is the base and the third lead is the collector. A relay switch circuit can be designed using npn transistor. Build simple audio circuits.
