What is capacitor?

Capacitor is an electronic device for storing charge. The simplest type of capacitor: parallel plate capacitor shown as figure; two conducting components (plats) with area S separated by distance d and charged with charge, +q and -q. In electronic circuit, capacitor is shown like this One way to visualize the action of a capacitor is to imagine it as a water tower hooked to a pipe. A water...

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Resistor - Color Coding and Standard Value

The flow of charge through any material encounters an opposing force similar in many respects to mechanical friction. This opposition, due to the collisions between electrons and between electrons and other atoms in the material, which converts electrical energy into another form of energy such as heat, is called the resistance of the material. Resistance is measured in Ohms (Ω), the capital Greek...

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The 555 Timer - Monostable Multivibrator

A Monostable Multivibrator is a circuit that produces an output pulse of fixed duration each time the input of the circuit is triggered. This is useful in producing timing signals. We can use 555 as monostable multivibrator by arranging the 555 timer as shown at picture below. When the trigger input is slightly less then +Vcc/3, the lower op amp has a high output and reset the flip-flop. This cuts...

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The 555 Timer - An Introduction

The 555 timer analog IC (Integrated Circuit) is very economical and convenient for use in mutivibrator circuits since few external components are required. It's packaged as a black box. The black box has eight connections called ‘pins’ and there is little white dot and dimple denote pin 1. The 555 uses a 3 – 18V DC power supply. The 555 timer IC has two comparator, one SR flip-flop and one switching...

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