5x7 Dot Matrix Led Display Character Patterns: Excellent alphanumeric characters can be displayed by using dot matrix LEDs with an LED at each dot location. Commonly used Dot Matrix Displays of prominent characters are 5…
555 Timer Circuit: The timer IC 555 Timer Circuit is most versatile linear integrated device introduced by Signetics corporation in early 1970. It is basically a monolithic timer circuit which can be used in many…
555 IC Timer Interview Questions and Answers: 1. What is 555 timer? Ans. The 555 timer is a highly stable IC that can produce accurate and highly stable time delays or oscillation. The frequency of oscillation…
3 Point Starter and 4 Point Starter -Construction and its Workings: The starter for a shunt motor (3 point starter) is shown in Fig. 1.59. At start all resistances are in series with the armature,…
Voltage, Current and Power in 3 Phase Star Connection: 3 Phase Star Connection - Figure 9.21 shows a balanced three-phase, Y-connected system. The voltage induced in each winding is called the phase voltage (Vph). Likewise…
3 Phase Relays: In a 3 Phase Relays, it is economical to build it on a single phase basis. Thus there will be three converter elements, one for each phase, but thereafter the rest of…
3 Phase Induction Motor Construction: A converter fed 3 Phase Induction Motor Construction has the following advantages over a line fed motor: 1.Smooth start up is guaranteed by variable frequency starting from a low 2.Soft…
3 Phase Delta Connection: Delta Connected System - Figure 9.26 shows a balanced three-phase, three-wire, delta-connected system. This arrangement is referred to as mesh connection because it forms a closed circuit. It is also known…
2 Pole Elementary DC Machine: Figure 5.13 shows a 2 Pole Elementary DC Machine with a single coil rotating armature. It may be seen that the field winding is stationary with salient poles whose pole-shoes…
2 Phase 4 Pole Permanent Magnet Stepper Motor: Figure 10.39 shows the phases (stacks) of a 2 Phase 4 Pole Permanent Magnet Stepper Motor. The rotor is made of ferrite or rare-earth material which is…
