RC-Differentiator : Procedure

Pre-Lab

Before experiencing the actual Virtual lab live experiments one should study the followings:

• Over view of the Virtual lab's live experiment page.
• Capacitor as a differentiator circuit diagram to be implemented on the virtual breadboard.
• Basic information and characteristics of capacitors.
• Basic information about charging and discharging of capacitor.
• The resistors and its values available on the virtual breadboard.
• Equipments like function generator and CRO. How these devices can be observed and calibrated virtually.

Procedure

1. In live experiment environment firstly one has to login or create the user id (if new) and then reached to the page shown. Then select the Lab option L1 or L2. For capacitor as a differentiator experiment choose L1.





2. From the select experiment list select the capacitor as a differentiator.





3. Place all the components on the breadboard. Place the capacitor and resistor on the virtual breadboard.





4. Connect the components on the breadboard as shown in the connected breadboard circuit at the bottom of the live experiment page next to the circuit diagram.





5. Connect the function generator to the capacitor and channel 1 of CRO to the circuit output.





6. Connect the grounds of circuit, function generator and CRO's channel 1 to the ground of the breadboard.


Note:the input waveform can be observe on CRO at channel 4 after locking the lab as the function generator's output signal is inputted to the CRO channel 4 externally.






7. After verifying the circuit using verify icon on breadboard, lock the circuit designed by clicking on the lock icon to operate function generator . To operate function generator click the Function Generator(FG) icon available on the left top of the page.







8. After clicking the FG icon set the input wave's specifications. For example set the frequency and amplitude of the input signal.







9. To check the output of Capacitor as a Differentiator circuit made on the bread board click on the run button on breadboard. The output can be observed on the CRO screen at channel 1. Click on auto scale icon on CRO display panel to automatically scale the waveform.




NOTE:one can check the log file after locking the designed for verifying and to observe the correlation between the actual hardwired circuit design through relays and the virtual circuit we have been designed on the virtual breadboard. For example, which relays has been shorted in the circuit and on which ports the components have been attached through relays in the circuit.