12V DC Power Supply Using a Step Down Transformer
12V DC Power Supply එකක් Step Down Transformer එක භාවිතයෙන් ලබා ගැනීම සරල සිංහල බසින්!
We cannot use 230V directly from the mains supply for most of our day to day projects so a dc power source is really essential as we cannot relay of batteries due to the daily cost.
The problem can be solved by using building our own power supply.
Here we constructs a 12V dc power supply.
Part List:
-12V X 2 step down center tapped 300mA transformer.
-230v plug socket.
-Flexible wire (1m).
-Heat sleeve (5cm).
-Insulation tape.
-2200 µF capacitor.
-330 O resistor
-Led.
-IN4001 or IN4007 diodes X 2.
Working principle:
* The 12Vx2 center tapped transformer convert the 230V AC to 12 V AC
* The pair of diodes then rectifies the 12V AC wave form to 12V DC
This output is continuously varying between 0-12V which is not suitable for most of our work
what we need is a stable dc power supply of 12 V
*The capacitor charges and discharges according when required to give us a stable 12V DC output
The output from the capacitor is very stable, a 330 ohms resistor was used to light up an led to indicate
the working state of our circuit.
The output from the capacitor can be then used to power our projects.
Safety precautions:
*Never touch the input terminals of the transformer , the connections should be fully insulated
using insulation tape and heat sleeve tubes.
*The maximum amount of output current is 300mA so the user should never short circuit the output terminals
to avoid too large current from being drawn which inturn creates a high probability to destroy the transformer.
*User should also avoid connecting loads that require current than 300mA.
*Capacitor should never be connected in reversed polarity os there is a chance of an explosion.
On the upcoming tutorials we will further improve this 12V fixed power supply to 0-12V variable power supply.
To stabilize the output voltage 7812 voltage regulator may be used.
Reference Video you need to watch : https://www.youtube.com/watch?v=SQPf2...
PDF Download - https://drive.google.com/open?id=0B-x...
We cannot use 230V directly from the mains supply for most of our day to day projects so a dc power source is really essential as we cannot relay of batteries due to the daily cost.
The problem can be solved by using building our own power supply.
Here we constructs a 12V dc power supply.
Part List:
-12V X 2 step down center tapped 300mA transformer.
-230v plug socket.
-Flexible wire (1m).
-Heat sleeve (5cm).
-Insulation tape.
-2200 µF capacitor.
-330 O resistor
-Led.
-IN4001 or IN4007 diodes X 2.
Working principle:
* The 12Vx2 center tapped transformer convert the 230V AC to 12 V AC
* The pair of diodes then rectifies the 12V AC wave form to 12V DC
This output is continuously varying between 0-12V which is not suitable for most of our work
what we need is a stable dc power supply of 12 V
*The capacitor charges and discharges according when required to give us a stable 12V DC output
The output from the capacitor is very stable, a 330 ohms resistor was used to light up an led to indicate
the working state of our circuit.
The output from the capacitor can be then used to power our projects.
Safety precautions:
*Never touch the input terminals of the transformer , the connections should be fully insulated
using insulation tape and heat sleeve tubes.
*The maximum amount of output current is 300mA so the user should never short circuit the output terminals
to avoid too large current from being drawn which inturn creates a high probability to destroy the transformer.
*User should also avoid connecting loads that require current than 300mA.
*Capacitor should never be connected in reversed polarity os there is a chance of an explosion.
On the upcoming tutorials we will further improve this 12V fixed power supply to 0-12V variable power supply.
To stabilize the output voltage 7812 voltage regulator may be used.
Reference Video you need to watch : https://www.youtube.com/watch?v=SQPf2...
PDF Download - https://drive.google.com/open?id=0B-x...
Comments
Post a Comment