NPN (more commonly used)
- The +ve runs through the base and into the emitter -ve that opens the collector and turns on the higher voltage.
- To turn the transistor on The base has to be higher than the ground voltage ie. 1v
PNP
- The +ve runs through the Emitter and into the base -ve that opens the collector and turns on the higher voltage.
Emitter is connected to the ground -ve.
- To turn the transistor on The base has to be a lower voltage than the source ie. 8v
