Electronic Devices & Circuits

Applications of Photo diodes

There are a large number of applications of photo- diodes. However, we shall give two applications of photo-diodes by way

There are two important characteristics of photo- diode. (i) Reverse current-Illumination curve. The below Fig shows the graph between reverse

LEDs are often grouped to form seven-segment display. The below Fig. shows the front of a seven segment display. It

A LED that emits one colour when forward biased and another colour when reverse biased is called a multicolour LED.

There are three leads in a transistor viz., emitter, base and collector terminals. However, when a transistor is to be

The matrix is controlled by a micro-controller. For the above 16-button 4×4 matrix, 8 pins of the micro controller will

A rectifier with an appropriate filter serves as a good source of d.c. output. However, the major disadvantage of such

The below Fig shows a typical capacitor input filter or π- filter. It consists of a filter capacitor C1 connected

The below Fig. shows a typical choke input filter circuit. It consists of a Choke L connected in series with the

Capacitor filter. Fig. shows a typical capacitor filter circuit. It consists of a capacitor C placed across the rectifier output in