Driver Transistor. If the led has a higher power requirement then it is best to use an npn transistor as a driver. We have a negative battery ground tied to digital ground.
The transistor we are using for this tutorial is p2n2222a and is rated at 40v and 200ma it just perfect for one toy dc motor. High speed gate drivers designed for stringent requirements of driving enhancement mode and gate injection transistor git gan hemt power switches in offline and half bridge power topologies. For that reason you must use a transistor.
Gate driver transistors are designed to minimize switching losses with emitter follower configuration and optimized pin out.
Illustrated above is the most common transistor driver circuit. Gate driver transistors are designed to minimize switching losses with emitter follower configuration and optimized pin out. The transistor we are using for this tutorial is p2n2222a and is rated at 40v and 200ma it just perfect for one toy dc motor. It can switch loads up to 60 volts with a peak current of 8 amperes and a continuous current of 5 amperes.
