Power Supply for MCU PCB

Jesse Duran
Fall 2020
CE 351

Introduction:

For this project we created a powersupply PCB using Eagle PCB. This included making our our componant library and preparing our files for manufacturing.

Schematic

Figure 1. Completed schematic with variable power output. ERC clean

Board Layout

Figure 2. Completed bored wired and ratnested. DRC clean

Gerber Files

Figure 3. Completed gerber files Blue-Top layer. Green-Bottom layer. Pink-silkscreen

Library:

Figure 4. 4.7uF/33uF capactior

Figure 5. 33uH inductor

Figure 6. LM2596

Figure 7. Power Jumper for power output selection

Figure 8. Schottky Diode

Figure 9. Power Switch

Figure 10. Soldered board

Figure 11. 5v 1A output

Figure 12. 3.3V 1A output

Figure 13. 5V 3A

Figure 14. 3.3V 3A

Discussion

Through this PCB creation process we learned how to pick appropriate componants for our project. We learned how to use Eagle PCB to create custom librarires and layout a PCB. The trial and error invlolved with this project allowed for the skills learned in Networks I to be re-enforced. Soldering the PCB provided good experience in soldering 0603 componants and taught me how to use the blower. Troubleshooting the PCB made me dig into the data sheets of the voltage regualtors and deepened the understanding of the overal performace. Overall the powersupply was a fun project that was rewarding to see working.