DIAC Characteristics

DIAC  Characteristics

1- Make circuit as shown in the fig. using patch cords.
2- To plot V-I characteristics proceed as follows.
3- Rotate both the potentiometer P1 fully counter clockwise direction.
4- Connect voltmeter across point ‘3’ & ground to read voltage VA.
5- Connect ammeter between point ‘1’n& ‘2’ to indicate the current IA.
6- Switch ‘ON’ the power supply.
7- Put the +35 v switch ‘ON’.
8- Vary the potentiometer P1 so as to increase the value of DIAC voltage VA and measure the corresponding values of current IA in an observation table1.
9- Plot the curve between +VA and +IA
10- Rotate potentiometer P1 fully in counter clockwise direction.
11- Switch ‘OFF’ the power supply.
12- Put the switch towards -35V
13-Switch ‘ON’ the power supply.
14- Vary the potentiometer P1 so as to increase the value of DIAC voltage VA and measure the  corresponding values of current IA in an observation table.
15- Plot the curve between -VA and –IA.

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