This project demonstrates the design and implementation of a Multi-Voltage Regulator PCB that provides 4 output voltages: 12V, 9V, 5V, and 3.3V. The circuit uses four voltage regulators:

• 7805 – for 5V output
• 7809 – for 9V output
• 7812 – for 12V output
• AMS1117-3.3 – for 3.3V output

This versatile power supply circuit is perfect for applications that require multiple voltages from a single source.

• Project Name: Multi-Voltage Regulator PCB (12V / 9V / 5V / 3.3V)
• Input Voltage: 12V to 35V DC (AC input can be used with rectifiers)
• Output Voltages: 12V, 9V, 5V, and 3.3V
• Current: Up to 1A (per voltage rail)

This project includes a PCB design with 4 different output voltages for powering various electronic components such as Arduino, sensors, and more. It's perfect for anyone working with multiple 5V or 3.3V devices in a single setup.

Below is the schematic diagram for the multi-voltage regulator.

Here’s the 3D model of the PCB layout. This model helps visualize the design before fabrication.

Here’s the PCB Layout that shows the routing of the traces and component placement.

The Bill of Materials (BOM) includes all components used in the design along with their LCSC part numbers. You can download the complete BOM below:

• Download BOM (Excel)

For more components, refer to the BOM file linked above.

• Versatile power output: 12V, 9V, 5V, and 3.3V.
• Compact and efficient design for powering multiple devices.
• Easy-to-understand schematic and simple components make this project ideal for beginners and electronics enthusiasts.
• Can be used to power microcontrollers, sensors, and various low-power electronics.

1. Connect the power source to the input terminal (12V-35V DC).
2. You can choose to use the 12V, 9V, 5V, or 3.3V outputs depending on the voltage required by your project.
3. The output voltage rails are capable of providing up to 1A of current per rail. Ensure to use proper heatsinking or cooling if higher current is drawn.
4. This design is perfect for powering various devices like Arduino, Raspberry Pi, and other embedded systems that require different operating voltages.

• Gerber File
• Download BOM (Excel)

This project is licensed under the MIT License – free to use and modify. Please credit the original creators if you share or use the design in your own projects.

Stay tuned for more electronics tutorials:

• Website: ElectroIoT.in
• YouTube: @ElectroIoT-IN
• GitHub: ElectroIoT GitHub

Happy building! ⚡🔧