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DC Power Supply: DC power supply is a traditional electronic device which takes AC power from AC mains and converts it into DC power to operate various electronic DC appliances. In electronic laboratory the DC power supply is a common…

Capacitor Capacitor is a two terminal passive electrical device that is formed with two conductive plates separated by any dielectric material. A capacitor can store electric charges by electrostatic force in itself. Capacitance is the property of a capacitor that…

Transistor: Transistor is a three terminal active electronic device that is made of two p-n junctions practically p-n-p or n-p-n junction in itself. It can amplify the amplitude of AC signal and acts as a switch also. In ancient days…

Alternating Current: AC means alternating current. The electric current which repeats its flowing direction periodically is called alternating current. This theme can be competent for AC voltage also. A very simple example of AC signal is sinusoidal wave. A sinusoidal…

Identity of Timer 555: Timer is a device that can measure the time interval. The 555 is an electronic timer IC. The 555 is capable of generating stable time delay of order of microseconds to hours and it can act…

Crystal Diode: Crystal Diode is a two terminal active electronic device that is made of a p-n junction in itself. It can convert AC signal to DC. In ancient days a special type vacuum tube is used as diode. The…

Circuit: Circuit is a complete or closed conducting path for current where current can flow from a specific point through the circuit and can return to the same point. Practically an electrical circuit is made of one or more sources,…

Resistor Resistor is a two terminal passive electrical device that acts to reduce current through itself. In electronic circuits resistors are most common component. Symbols: In PCBs and electronic schematic diagrams we can find various symbols of resistors. Schematic symbols…