Design Of Digital Circuits - Dharmsinh Desai University

Design Of Digital Circuits Lab Manual
EXPERIMENT -1
1 AIM: To make 5 volt DC power supply
2 TOOLS/APPARATUS: Connecting wires, Multimeter, Step-down Transformer, Capacitors ,LED Diode
etc.
3 STANDARD PROCEDURES:
Designing the Solution:
7805
230 V 330 Ω
50 Hz C 1 C 2 C 3 C 4
Stepdown Transformer:
Fig:1.1 Power Supply
It is used to step down the voltage of A.C signal. Here we are using 9 V stepdown
transformers. It converts 230 V A.C signal into 9 V A.C signal.
Bridge Rectifier:
It converts A.C signal into D.C signal. It is full wave rectifier. Here it converts 9 V
A.C signal into 9 V D.C signal.
Capacitors:
After rectification, we don’t get the perfect D.C signal; there is some ripple in it. To
avoid this kind of ripple, we use capacitors. It works as a filter.
Here C 1 =220 µF, 16 V, C 2 =0.1 µF, 10 V, C 3 =100 µF, 10 V , C 4 =0.1 µF, 10 V.
LED Diode:
It is used to check whether the circuit is getting power or not. LED turns on when the
circuit gets power.
4 CONCLUSION:
Finally we get 5 V D.C voltages across LED. We can use this circuit as a 5 V D.C power supply.
Department of Information Technology, Faculty of Technology, D. D. University, Nadiad.
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