Procedure

Pre-Lab Experience

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

• Over view of the Virtual lab's live experiment page.
• Inverting Amplifier circuit diagram to be implemented on the virtual breadboard.
• Pin diagram of the IC 741.
• The resistors and its values available on the virtual breadboard.
• Equipments like function generator, power supply and CRO. How these devices can be observed and calibrated virtually.

Procedure

1. In live experiment environment one has to login or create the user id (if new) first and then go to the page shown below. Then select the Lab option L1 or L2. For inverting amplifier choose L1.



2. Select the inverting amplifier experiment option from experiments list.



3. One can first check the connection by loading the circuit design on the virtual breadboard using

   load

   icon. Then either use the loaded design or make the connections as follows: Drag the components op-amp 741IC and resistors R₁and R₂and place them on the breadboard.





4. Connect the components according to the inverting amplifier circuit diagram with the help of pin diagram of 741 IC.





5. Connect the function generator to the resistor R1. And connect the power supply to the 7(+V) and 4(-V) pins of the op-amp.





6. Connect all the grounds, function generator and CRO grounds to the common ground.





7. Connect CRO to the feedback resistor R2 to observe the output waveform.





8. Verify the circuit by clicking on �verify� icon, lock the circuit by lock icon to use devices on the VLab live experiment page.




NOTE: To verify the designed circuit one can check the logfile as shown below.


9. Set the frequency and amplitude of the input waveform after clicking on the

   OPEN

   Function Generator icon and then click on

   Run

   icon to run the experiment.





10. Now one can observe input and output wave on CRO.





11. Check the inverted and amplified output waveform and calculate the gain as explained in the lab report.