The PPT for understanding function and components of power supply. It shows function of transformers, resistors, rectifiers as well as the block diagram of the power supply.

1. POWER SUPPLY

2. DEFINITION
 A system that converts AC current
from the wall outlet into the DC
currents required by electronic
circuits.

3. FACTS
 INPUT
 OUTPUT
 TRANSFORMER
 BRIDGE RECTIFIER
 FILTER
 REGULATOR
• 220/240 V AC
• 1.2-30V DC
• STEP DOWN AC
• CONVERT AC IN
PULSATING DC
• FILTER THE
RIPPLES
• REGULATES THE
O/P VOLTAGE

4. BLOCK DIAGRAM

5. FUSE
 Fuses are an important protection component of all electrical circuits.

7. TRANSFORMER
NOTE: USE MULTISIM SIMULATION

8. BRIDGE RECTIFIER
A bridge rectifier makes use of four diodes in a bridge
arrangement to achieve full-wave rectification. This is a
widely used configuration, both with individual diodes
wired as shown and with single component bridges
where the diode bridge is wired internally.

9. FILTER CIRCUIT (RC CIRCUIT)
OUR FILTER
CIRCUIT

10. REGULATOR (LM 317)
The output voltage from the LM317 can be set using
two resistors (R1 and R2).
The resistors values can be selected according to the
following formula:
VOUT = 1.25 * ( 1 + R2/R1 )

11. VOLTMETER
A voltmeter is placed in parallel with a circuit element to
measure the voltage drop across it

12. OTHER COMPONENTS:
 POTENTIOMETERS:
 PRE-SET:
 RESISTORS:
Preset resistors are used in circuits when it is necessary
to alter the resistance. Dark/light and temperature
sensors usually have these components as the preset
resistor allows the circuit to be
made more or less sensitive

13. OTHER COMPONENTS (CNTD):
 RESISTOR
Big boys race our young girls but Violet generally wins
Better be right or your great big plan goes wrong

14. OTHER COMPONENTS (CNTD):
 CAPACITORS A device used to store charge in an electrical circuit. A capacitor functions much like a battery,
but charges and discharges much more efficiently (batteries, though, can store much more
charge).

15. OTHER COMPONENTS (CNTD):
 BINDING POST
• PCB TERMINAL
BLOCK
• KNOB FOR
POTENTIOMETER

16. USEFUL INFORMATION