The LED will burn out if the voltage across it is much more than 2 V. If the LED is being powered by a supply greater than 2 V, we need a resistor (R3) in ... Previous circuits in this topic have used BJTs of the type known as npn transistors .
|Title||:||Electronics Circuits and Systems (4th Edition) by Owen Bishop|
|Author||:||Owen Bishop, Digital Design|
|Publisher||:||Digital Designs - 1995|