micropad
Hardware- 1 Devlogs
- 2 Total hours
a 4 key hackpad to create macros, along with a display, rotary enoder, and rgb led backlighting
micropad - schematic + PCB design
Yesterday, I worked on my hackpad design, building out more of the circuitry.
My project includes:
- 4 switches
- 4 RGB leds
- 1 OLED display
- 1 rotary encoder
First, I was working on my PCB design, and I was looking to find a good OLED display footprint. I tried making my own footprint using a 2.54mm 4 pin header, then editing it to change the dimensions. Although this looks pretty much the same as a 0.91” OLED, I don’t think the dimensions are precise and where the pins should be located. I’m still looking for an exact OLED display footprint, the download on the hackpad guide is flipped and when I rotate it, the pin order of GND, VCC, SCL, SDA is wrong. I don’t know how to edit the footprint to fix the pin order.
Next, I wanted to make my schematic look more visually pleasing, as I compared my original layout to other projects and they were better organized. Utilizing KiCAD’s global labels, I was able to organize the schematic better and group the components. (Previously, I used wires connecting every component to the MCU.)
Hopefully I can figure out the OLED footprint on my PCB, then I can route the PCB and finalize both the schematic and PCB. I will move onto the CAD design using Onshape most likely.
The below screenshots show the finished schematic, and rough layout of my PCB. The OLED doesn’t have precise dimensions with the pin placement and rectangle.
