

And both diode conduct alternatively and both LED’s starts glowing. If the transistor is in shorted condition, the transistor acts as a closed switch.

If the NPN transistor is in open state, the transistor does not conduct and no current flow through LED.By using the variable resistor, we can check the transistor with various base currents. By the alternative nature of the input AC, we can see that the red LED is in ON state and the transistor is in good working condition(Diode D2 and Green Led is in reverse biased and in OFF state).During the next half cycle, the transistor is reverse biased and is in OFF state. During the first half cycle of the transformer input, the emitter base junction of transistor is forward biased and collector base junction is reverse biased and the transistor is in ON state and diode D1 is in forward biased The current starts flow through the D1 and the red LED begins to glow.IC Databook In this IC-Databook Software you will find pin assignments, connection layouts, function tables and the most important specifications available for the 40x. Let us start by connecting an NPN transistor to the circuit with the corresponding Emitter, Base, and Collector terminals and the switch on the circuit. The new updated data base version 2009 contains the data of Pada jaman dulu kita mengenalnya masih berupa 'Buku Persamaan Semikonduktor ( IC, transistor, Buku.Take a look at the circuit diagram given below. This circuit basically works on the basis of transistor switching action (Basic Transistor Theory). The principle behind this circuit is very simple.
