Experiment :
“Transient response of RC circuit with square wave applied using actual hardware components”
components required:
1. Oscilloscope
2. Function generator
3. R1=1KΩ , R2=4.7Ω , C1=0.1µF , C2=0.01µF
4. Unknown capacitance (Cx)
5. Breadboard and connecting wires
Procedure:
1. Use above values of resistor and capacitor make the combinations R1C1, R1C2,R2C1, R2C2,
&R1CX for the series RC circuit and made the circuit according to given diagram.
2. The capacitor is charged and discharged with a square wave. By observing the wave from across ‘C’ I determined
charging and discharging characteristics.
3. I Calculated the time constant and recorded its values in table.
4. I adjusted the square wave generator for the output with a pulse time equal to 6τ.
5. I calculated the frequency (f=1/t).
6. I adjusted the scopehorizontal sweep rate and positioned the trace so that the capacitor charge begins at a vertical
graticule line.
7. I adjusted the vertical position control so that the bottom of the waveform sits on a horizontal line and adjusted
attenuator so the trace fills the screen.
8. I Read wave of charging and discharging on the screen and determined its time constant.
9. I connected channel 2 of the oscilloscope to the output of function generator and super imposed the square wave
signal over the capacitor curve and changed the source frequency.
10 . I repeated the procedure for the other combinations of step1 and recorded the results in table.
