Friday 2 May 2014

noise generator

555 Capacitor and Box


The Capacitor in the 555 astable oscillator circuit
Capacitors are components that are used to store an electrical charge and are used in timer circuits. A capacitor may be used with a resistor to produce a timer.
When power is supplied to a circuit that includes a capacitor - the capacitor charges up.
When power is turned off the capacitor discharges its electrical charge slowly.
A capacitor is composed of two conductors separated by an insulating material called a DIELECTRIC. The dielectric can be paper, plastic film, ceramic, air or a vacuum. The plates can be aluminium discs, aluminium foil or a thin film of metal applied to opposite sides of a solid dielectric. The CONDUCTOR - DIELECTRIC - CONDUCTOR sandwich can be rolled into a cylinder or left flat

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