Custom-Macropad (Catpad)
Hardware- 5 Devlogs
- 8 Total hours
I am building a custom 3×3 macropad built from scratch with a XIAO RP2040, custom PCB, and 3D-printed case. It will include an OLED display and rotary encoder.
Waiting on a reviewer. We'll let you know as soon as there's a decision.
Macro-pad Case Part 1
I spent forever fixing the assembly and sketch, but now I’ve finally finished up the case design (aside from the fillet feature). Everything fits for the most part.
Learning CAD for the case (Macropad/hackpad)
I have been designing my case for the macropad i’m building in CAD (onshape, as I am a bit more familiar with the software over Fusion or Solidworks). I am having a bit of trouble getting everything to fit within tolerance, but I have found a work around solution. More designing tomorrow.
PCB Routing + Finish PCB Design
I routed the PCB together and I finished the PCB design. Now I need to create the case in CAD software, then write the firmware. Hopefully I can finish both tomorrow.
To route the PCB, I used 2 layers. The OLED, switch matrix, and rotary encoder are all on the front, while the microcontroller and diodes are in the back. This allows me to have a more clean design.
Hackpad blog 2: Finished Schematic, working on routing PCB.
So far i have finished the schematic. I decided to delete the 2nd rotary encoder since I don’t see a justification for using it, as the first rotary is enough. Now, I need to learn to route the PCB, as well as align it nicely. Hopefully, I’ll be able to finish the PCB design soon. Then I will design the CAD case, then create the firmware.
Hackpad blog: Currently working on adding parts to the schematic.
I am either going to go with 9 keys in a 3x3 matrix, or the 3x3 matrix with the addition of 2 rotary encoders and the OLED screen. After I’m done wiring everything, I will route the PCB together.
