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Zener Diode as Voltage Regulator
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## Controls

Insert Key Button:This is used to insert key on the switch connected with battery. This key is only activated when the connection is perfect.

Choose Zener Diode: This combo box is used to select different zener diodes having different zener voltage

Series Resistance: Value of the Series Resistance can be directly input here.

Slider

Rheostat value: Rheostat can be controlled by using this slider

Load Resistance: Value of load resistance can be set or change by using this slider

Button

Reset Button: To reset all the connections

## Procedure

Using the circuit diagram, identify the connections in the given platform. Connections are made as shown in the below diagram. ## How to make connections in simulation ?

Click one end node of the battery and drag to the next position, where we want to connect the wire. Just like shown in the figures below:   (a)                                                         (b)                                                      (c)

Like this, make all the connections are perfect.

## Full connection diagram If the connections are correct, Insert Key option activated

## Line regulation

1. Choose the zener diode to start the experiment.
2. Insert the series resistance value.
4. Change the Rheostat value from maximum to 0 by the interval 100.
5. Note down the corresponding input voltage and output voltage and tabulate it.
6. Plot the graph in which VIN at x-axis VL at y-axis. Percentage of Line regulation = 1. First 3 steps are same as above.
2. Fix the Rheostat value, to get the 12 V at voltmeter across rheostat.
3. Change the load Resistance with the interval of 100 Ω/1000 Ω up to maximum range.
4. Note  the reading and tabulate it.
5. Plot the graph between V0 along x-axis and RL along y-axis. Let us consider VNL is the output voltage when there is no load resistance (ideally VNL = Zener voltage) and VFL is the output voltage when load resistance is maximum.

Percentage of Load regulation = Note: This is an ideal circuit. For a real circuit, there will be small variations in output voltage with varying input voltage or load resistance.

Cite this Simulator:

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