12V Dual Power Supply Circuit Diagram | 7812 Voltage Regulator Circuit is the artlcle explaining 7812 Voltage Regulator Circuit – 12V DC Power Supply The 7812 is a three-terminal linear voltage regulator IC that provides a fixed regul...
7812 Voltage Regulator Circuit – 12V DC Power Supply
The 7812 is a three-terminal linear voltage regulator IC that provides a fixed regulated output voltage of 12V DC. It is commonly used in power supply and voltage regulation applications where a stable output voltage is required.
The 7812 is a positive voltage regulator, which means that it provides a positive output voltage with respect to the common ground. It is widely used in electronic circuits that require a regulated 12V DC supply.
7812 Voltage Regulator Circuit
A 7812 voltage regulator circuit can be used to obtain a stable 12V DC output from a higher DC input voltage. The regulator helps maintain the output close to 12V when the input voltage is higher than the required output voltage.
This type of regulated power supply is useful for electronic devices and circuits that require a stable DC voltage with low ripple.
12V Dual Power Supply Circuit Diagram
How the 7812 Voltage Regulator Works
The 7812 regulates the input voltage and provides a fixed positive output of approximately 12V DC. When a suitable input voltage is applied, the IC regulates the voltage supplied to the load.
The regulator is useful in power supply circuits where a consistent 12V DC voltage is required. It can also help reduce variations and ripple present in the unregulated supply.
12V Dual Power Supply Using 7812 and LM7912
For a dual power supply, the 7812 can be used to provide the positive +12V output, while the LM7912 is used to regulate the negative voltage and provide approximately -12V.
The combination of 7812 and LM7912 is useful in circuits that require both positive and negative supply voltages, such as some audio and electronic circuits.
Voltage Regulator
A voltage regulator is an important part of many electronic power supply circuits. Its main function is to maintain a stable output voltage even when the input voltage or load conditions change within the regulator's operating range.
Voltage regulation helps electronic circuits operate more reliably by providing a controlled DC supply and reducing unwanted variations and ripple.
7812 IC Pinout
The 7812 is a three-pin voltage regulator IC. Its pins are used for input voltage, ground, and regulated output voltage.
7812 IC Pinout Diagram
- Pin 1 – Input: Connects to the unregulated positive DC input.
- Pin 2 – Ground: Connects to the common ground of the power supply.
- Pin 3 – Output: Provides the regulated +12V DC output.
7812 IC Specifications
- IC: 7812
- Type: Positive linear voltage regulator
- Regulated Output: 12V DC
- Number of Pins: 3
- Typical Maximum Output Current: Up to 1A, depending on the specific device, heatsinking and operating conditions
- Typical Input Range: Depends on the particular 7812 device and required dropout margin
7812 IC Datasheet PDF Download
For detailed electrical characteristics, operating conditions, pin configuration and other specifications, refer to the manufacturer's 7812 datasheet.
If the download link below does not open, you can use the alternate Google Drive link.
7812 IC Datasheet PDF Download
7812 IC Price
The price of a 7812 voltage regulator IC can vary depending on the manufacturer, package type, quantity and seller. If you want to purchase a 7812 IC, check a reliable electronics component supplier for the latest price and availability.
Applications of 7812 Voltage Regulator
The 7812 can be used in various electronic power supply applications where a regulated 12V DC output is required.
- 12V DC power supplies
- Electronic control circuits
- Audio and amplifier circuits
- Low-voltage electronic projects
- Regulated power supply circuits
How to Make AC to DC 12V-0-12V Dual Power Supply Circuit Using Transformer
A transformer-based dual power supply can be used to obtain positive and negative DC supply rails for electronic circuits. In a suitable design, the regulated positive rail can be provided using a 7812, while the negative rail can be regulated using an LM7912.
This type of dual power supply is commonly useful for circuits that require both positive and negative supply voltages.
Conclusion
The 7812 voltage regulator is a simple and widely used solution for obtaining a regulated 12V DC supply. Its three-pin configuration makes it easy to use in many power supply and electronic projects. For applications requiring both positive and negative supply rails, the 7812 can be combined with an LM7912.