General purpose Silicon NPN transistor Used for switching and amplification purposes is available in Pakistan.
The BC547 NPN Transistor is geared towards passing electrons from the emitter to the collector (so that conventional current flows from collector to emitter). The emitter “emits” electrons into the base, which controls the number of electrons the emitter emits. Most of the electrons emitted are “collected” by the collector, which manages to send these to the next part of the circuit.
1 x BC547 NPN Transistor