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.
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
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.
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
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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).