Introduction ( Part 1 of 4 )
While browsing the local fb mechanical keyboard group, one member was doing a group buy on an interesting qmk firmware numpad called dumbpad from imchipwood. I always wanted a programmable numeric pad and a rotary encoder for multi function use.
|SVT RGB dumbpad|
Fork of Dumbpad
- RGB backlit using WS2812B
- SMD components for PCB Assembly ( diodes, LEDs, resistors, buttons, caps )
- Large solder pads so it does not peal off easily
I also added 3D models in KiCAD of the Cherry-MX switch and EC11 rotary encoder for matching the holes and visualizing the dimensions.
I edited all the footprints and made it bigger for all the soldering pads. The above is a cherry-mx + rotary combo switch.
- Pro Micro cannot fit between the PCB and top plates with only 5mm clearance
- Reset buttons need to be placed at the bottom
- Experimenting a FR4 only without copper pour and soldermask so the LED at the bottom PCB can shine through it
Had to go research on various PCB face plates design from 40percent.club and reading various post on different types of design for this.
|SVT RGB Plates|
|SVT RGB bottom layer|
I also added an jumper option for the 3rd LED to choose between LED or underglow RGB.
- Added 2 x RGB LED strips for LED underglow
- Switched all components to SMD
- Large solder pads for switches
- Flipped the Pro Micro
- PCB Plates to hold the switches
- LED shining through PCB plates
- Enlarge all pads for the Cherry-MX-Encoder footprints
- A few extra M3 mounting holes