This document summarizes the key components of a power supply system. It discusses that power can come from AC or DC sources like electric poles or batteries. A power supply system takes the 220V AC supply and modifies it using components like a step down transformer, diodes, and a voltage regulator to output the 3-24V DC needed to power circuits and motors. It also describes the basic functions of diodes and how bridge rectifiers are used to convert AC to DC for use in power supply systems.

1. POWER SUPPLY SYSTEM
By: Rahul kumar
Gandhi Engineering College, BBSR

2. Power source
 An Alternating current(AC) and a Direct current(DC).
 AC source:- Electric pole
 DC source:- battery

3. Power Supply System
 Suitable power supply is needed to run the motors and
associated circuitry
 Typical power requirement ranges from 3V to 24V DC
and if we want to use more power than increase the
current of transformer.
 220V AC supply must be modified to suit the needs of
our machine
 Batteries can also be used to run robots

4. DC Power Supply
D8
D1N4007
Step Down Transformer
D10
D1N4007
Ground
C1
1000uF
230 V AC
+ V
D9
D1N4007
TX1 D7
D1N4007

5. Various parts of power supply
system
 Diode Rectifier
 Transformer
 Voltage Regulator(7812 IC)
 Black box

6. Diode
 An electronic, unipolar device.
 Act as a switch
 Symbol:-
 Mode of working:- 1. forward biased
2. reverse biased
Note:- knee voltage= 0.7 volt

7. Mode of working of diode

8. Bridge Rectifier
 An electrical device that convert alternating current to
direct current
 Types of rectifier
1. Half wave rectifier
2. Full wave rectifier

9. Machine
 Machine is anything that reduce human effort.
 Types of machine:-
1. static machine
2. rotating machine