STM microcontroller board

                             

                             

[The above schematics is designed in Raspberry pi using KiCad, in headless mode via ssh connection.]




Below is my first PCB design in KiCad an opensource EDA.
Learning points so far---

  • Decoupling Caps must be connected very tightly, they are small power source they filter out any noise present in dc supply also give current to the system when suddenly power on.
  • All the sensitive components(inductor,crystal,decoupling caps,etc) must be routed first.
  • The feedback line must be placed in such a way that there is no interface from magnetic elements like inductors(in case of SMPS).
  • Trace widths are vitals for current flow, pay additional attention while designing PCB.
  • Importing footprints of components i.e., CAD or EDA model from manufacturer (.stp file).
  • For high speed PCBs impedance matching is must but here it is not necessary.
  • SMPS are NOT recommended to design in breadboard.
  • Ground plane is used to lower electrical noise and interference through ground loops and to prevent cross-talk between adjacent circuit traces.

Thanks to Philip Salmony, 🙏 for awesome tutorials which helped me start the journey.


The schematics




The layout



The 3D view



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