The animation above shows miniature trucks carrying bags of energy from the battery to a light globe. The light globe…
What happens when we connect the batteries in series and parallel? When we connect the Batteries in Series, we will…
A transformer is based on the fact that when an AC current flows through a wire, it generates a magnetic…
What is optocoupler? An optocoupler is an optical link and it connects two circuits via this link. The optical link…
Phototransistors are used in a variety of applications. A light-operated relay circuit is shown in below Figure (a). The phototransistor Q1…
A phototransistor is similar to a regular BJT except that the base current is produced and controlled by light instead of…
The below Figure illustrates the basic operation of a BJT as a switching device. In part (a), the transistor is in…
A transistor amplifies current because the collector current is equal to the base current multiplied by the current gain, b. The base…
Using a circuit like that shown in Figure (a), a set of collector characteristic curves can be generated that show how…
As we all know, both Silicon and Germanium are semiconductor devices. But the present trend is to use Silicon instead…