#Rotary Numpad

This is a personal project of mine where I wanted a number pad that I can put on the left side of keyboard that doesn't have a numberpad. I fell in love with the feel of rotary encoders on my 3d printer, so added three to be able to play around with.

• Keyboard Maintainer: rabijl
• Hardware Supported: Sparkfun Pro Micro 5V (atmega32u4)
• Hardware Availability: https://www.sparkfun.com/products/12640

#How to build from scratch

I handsoldered gateron blue switches to a 3D printed case. The design is modified from the Ultipad.
I used a sparkfun Pro Micro as my microcontroller and the pinout can be found in the info.json. I found this site
to be very useful to identify different pins. You can find useful information on rotary encoders from the qmk docs here and here.

#matrix

Due to the three rotary encoders, I had to use most of the available pins. Fortunately, all the buttons still fit in a 6x4 matrix. Looking at the diagram below, the three buttons in the first column correspond to each encoder button.

        ┌──┐┌──┐┌──┐┌──┐
        │0A││0B││0C││0D│
┌──┐    └──┘└──┘└──┘└──┘
│5A│
└──┘    ┌──┐┌──┐┌──┐┌──┐
        │1A││1B││1C││1D│
        └──┘└──┘└──┘└──┘
        ┌──┐┌──┐┌──┐┌──┐
        │2A││2B││2C││2D│
┌──┐    └──┘└──┘└──┘│  │
│3D│    ┌──┐┌──┐┌──┐│  │
└──┘    │3A││3B││3C││  │
        └──┘└──┘└──┘└──┘
        ┌──┐┌──┐┌──┐┌──┐
        │4A││4B││4C││4D│
        └──┘└──┘└──┘│  │
┌──┐    ┌──────┐┌──┐│  │
│5D│    │5B    ││5C││  │
└──┘    └──────┘└──┘└──┘

#Flashing

Make example for this keyboard (after setting up your build environment):

qmk compile -kb handwired/rabijl/rotary_numpad -km default

Flashing example for this keyboard:

qmk flash -kb handwired/rabijl/rotary_numpad -km default

See the build environment setup and the make instructions for more information. Brand new to QMK? Start with our Complete Newbs Guide.

#Bootloader

Enter the bootloader in 3 ways:

• Short reset leads: tap the reset lead to ground twice quickly after qmk is in flash mode
• Keycode in layout: double tap the key mapped to QK_BOOT. On the default keymap this can be found by holding in key (0,C) and tapping key (0,A), see the matrix section for the positions of these keys.
• Bootmagic reset: Hold down the key at (0,A) in the matrix (see matrix section) and plug in the keyboard

Note: if the keyboard doesn't show up after putting the keyboard in reset mode, check that your user is added to the tty and/or uucp groups.
You may need to logout after adding these groups to your user, for the changes to take affect.