Relay Driver Using Pnp Transistor. 4 learn how to test bjt transistors using a multimeter. Basic transistor relay driver actuated on low input pnp this circuit will actuate the relay when the input goes to logic low.
In this situation no collector current flows and the relay coil is de energised. General purpose amplifier. Going from a back view the first lead is the emitter the second lead is the base and the third lead is the collector.
Relay driver circuit using pnp bjt a transistor works best as a switch when it is connected with a common emitter configuration meaning the emitter of the bjt must be always connected directly with ground line.
5 learn how to construct opamp comparator on a stripboard. In this situation no collector current flows and the relay coil is de energised. Npn relay switch circuit. Going from a back view the first lead is the emitter the second lead is the base and the third lead is the collector.
