Today many electronic circuits need stable 5 volt DC supply.
However, AC mains supply is very high, so voltage reduction is also required.
Also voltage regulation is important and therefore a voltage regulator circuit is used.
In this article, a simple IC LM309 Based 5 Volt Power Supply Circuit is explained.
Moreover, the circuit is reliable and is also easy to build, thus beginners can build it without any difficulty.
Circuit Working:
Parts List:
| Components | Value | Quantity |
|---|---|---|
| Capacitors | Electrolytic 2200uF 25V | 2 |
| Electrolytic 220uF 25V | 1 | |
| Ceramic 0.01uF | 1 | |
| Semiconductors | Bridge Diode 1N5402 | 4 |
| Voltage Regulator IC LM309 or IC LM7805 | 1 | |
| SPST On-Off Switch | 1 | |
| Fuse 0.5A | 1 | |
| Step Down Transformer 6.3V 2A | 1 | |
| DC Power Output 5V DC | 1 |
In this article the circuit converts 220V AC into stable 5V DC.
At first, the AC supply is applied to the transformer and as a result the voltage is reduced to 6.3V AC.
Then the low AC voltage goes to the bridge rectifier, so AC is converted into pulsating DC.
After that C1 and C2 capacitors are used and they remove the ripples.
Hence, smoother DC voltage is produced.
Now this DC voltage is fed to LM309 IC and this IC regulates the voltage.
Therefore, the output becomes constant 5 volts DC.
Finally C3 and C4 are used at output and they remove the noise and thus clean and stable 5V DC is obtained.
How to Build:
To build a IC LM309 Based 5 Volt Power Supply Circuit follow the below steps for connection:
- First collect all the parts of circuit as shown in circuit diagram.
- Then connect transformer primary to input of 220V AC
- Next, connect transformer secondary to bridge rectifier input.
- Connect rectifier output positive to C1 positive and negative of C1 to GND.
- Connect rectifier output negative to ground.
- Connect capacitor C2 positive from rectifier output positive and negative of capacitor C2 to GND.
- Connect pin 1 of IC LM309 to bridge rectifier through capacitors C1 and C2
- Connect pin 2 of IC LM309 to output of 5V DC through capacitors C3 and C4
- Connect pin 3 ground of IC LM309 GND of the circuit.
- Finally take 5V output across output capacitor C3 and C4.
Conclusion:
To conclude, IC LM309 Based 5 Volt Power Supply Circuit is simple and efficient.
It provides stable output which is easy to construct and is also suitable for beginners.
Therefore, this circuit is ideal for small electronic projects and hence, it is widely used in power supply applications.
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