@ItsTann

Today I continued working on the PCB for my Mechanical Calculator project.

After finishing yesterday’s schematics I assigned the footprints to each component of my build.

NOTE: I plan to hand-wire the battery to the microcontroller later when I have the materials ready.

I designed my PCB to be 86mm x 126mm using KiCad. This design features 17 keys (10 number keys and 7 operation keys) . I also used KiCad’s 3D viewer feature to visualize my PCB.

Designing the PCB.

I’m creating a schematic for the pcb based on a common calculator layout.

This includes:

• Designing the key matrix (to reduce the amount of pins needed on the microcontroller).
• Creating labels and connecting it to the microcontroller.

I’m using the Arduino Pro Micro as my microcontroller, a 7 segment 8 digit display (MAX7219), and using mechanical keyboard switches.

I haven’t assigned any footprints yet.