Capacitance (Timing Circuits) Essay Example | Topics and Well Written Essays - 500 words

Capacitance (Timing Circuits) - Essay ExampleFor capacity derived unit is useful for expressing the scoot (unit of charge is Coulombs)that can be transferred to an object per unit of voltage ( unit of voltage is in Volts) and thus a unit which we got from this ratio is known as Farad. Each optical condenser having two parallel plates and will study capacitance commensurate to8.85 F/m, times the area of one of the plates, divided by the distance betwixt them. When sharing the charge applied to one condenser with a second capacitor, charge is conserved, therefore Vf * (C1 + C2) = Vi * C1. When discharging a capacitor through a resistor, V(t) = V0 * e-t/RC. When charging a capacitor through a resistor, V(t) = Vf Vf * e-t/RC (Courseworkbank).In quantify circuits there are two possibilities either we are controlling the rate of response of the capacitor or controlling the rate of voltage across the capacitor. If a series combination of a resistor and capacitor are present such ty pe of circuit is simplest timing circuit. The amount of time to charge the capacitor to 63% of the input voltage as well as it is equal to the resistance times the capacitance is known as time constant T=RC.Varying the values of resistance and capacitance ultimately results in time ranging from microseconds to weeks. The important characteristics of capacitor areThis timer circuit is similar to the 5 to 30 endorsement timer except that when switch S1 is closed, the on/off action of the circuit will continue indefinitely until S1 is opened again. A 7555 time and low leakage type capacitor for C1 must be used. The 6 way rotary switch S3 adds extra resistance in series to the timing chain with from each one rotation, minimum resistance point a maximum point f. The 7555 is wired as an equal mark/space ratio oscillator, the timing resistor chain R1 to R6, being connected back to the production of the timer at pin 3.The output pulse duration is defined