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

 

·         Over view of the Virtual lab's live experiment page.

·         Differentiator circuit diagram to be implemented on the virtual breadboard.

·         Pin diagram of the IC 741.

·         The resistor and capacitor values available on the board to be used in the circuit design.

·         Equipments like function generator, power supply and CRO. How these devices can be observed and calibrated virtually.

 

 

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 differentiator choose L1

 

 

2.     From the select experiment list select the differentiator experiment option.

 

 

3.     Place all the components on the breadboard. IC 741, resistor, capacitor 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 nest to the circuit diagram.

 

 

5.     Connect the function generator to the capacitor and ground to the pin 3.

 

 

6.     Connect the power supply + to the inverting input at pin 2 and½ to the pin 4.Connect the grounds of function generator and CRO channel 1 to the ground of the breadboard.

 

 

7.     To observe the output at CRO connect its channel 1 port to the resistor. 
Note: the input waveform can be observe on CRO at channel 4 as function generator 1/2s output signal is inputted to the CRO channel 4 externally

 

 

8.     After verifying the circuit using verify icon on breadboard, lock the design by using lock icon on the breadboard. Then click on open function generator icon on function generator at the top left of the page.

 

 

9.     Set the specifications as mentioned. For example set the frequency and amplitude of the input signal. To check the output of a differentiator r set the input wave on triangular (ramp) wave so that square wave at the output of the differentiator can be observed easily

 

 

10.   To run the differentiator one can then press run button on breadboard. Click on �auto scale� icon on CRO to automatically scale the output waveform and will show the desired output square wave.

 

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.