Support for Alternative Layouts
This is a summary of how alternative layouts have been supported by kits such as Colevrak and Homing. It is not a discussion of alt layout performance and development, but if that interests you I highly recommend starting with Pascal Getreuer’s A guide to alt keyboard layouts (why, how, which one?). It’s a concise and comprehensive overview with links to some great sites that go deeper. He also has a separate Links about keyboards page. The Keyboard layouts doc he recommends explains layout goals and metrics in detail, summarizing the alt layouts discussed here as well as more than one hundred others. Sculpted-profile The majority of custom keycap sets are sculpted-profile (Cherry, SA, MT3, KAT, etc. - more on profiles generally here) so let’s start there. Because each row has a unique keycap shape, alt layouts require a unique keycap for each legend that moves off its QWERTY row. At first there were two The Dvorak layout was patented in 1936 by August Dvorak & William L....
Apr 23, 2024
PCB: http://dirtypcbs.com/view.php?share=14162&accesskey=f429cad9a82d1292b1013e43a49ba001
Firmware: https://github.com/VinnyCordeiro/tmk_keyboard
The PCB provided on this buy (or at least the one on the previous buy) is based on Microchip's PIC architecture. I have used the ATmega32U2 microcontroller, which uses Atmel's AVR architecture. They are not compatible with each other.
1x ATmega32U2 TQFP32 16x 1N4148 SMT Diodes 4x 0805 SMD resistors -R1&2 - 22 Ohms -R3 - 10k Ohms -R4 - Not connected (I think), see note 1x 16Mhz through-hole crystal 1x button switch 4x Capacitors SMD: -C1 - 10uF -C2 - 1uF -C3&4 - 20uF 2x 20pf 0805 SMD capacitors 1x Mini USB 5 pin female Jack Plug
Note: R4 is connects to pin PD7 on the ATmega Functions of this pin from the datasheet: -HWB/TO/INT7/CTS, Bit 7 HWB, Hardware Boot : The PD7 pin can serve as TO, Timer/Counter0 counter source. INT7, External Interrupt source 7: The PD7 pin can serve as an external interrupt source to the MCU. CTS, USART1 Transmitter Flow Control. This pin can control the transmitter infunction of its state.
Here's a picture of the board: https://i.imgur.com/9ZKQ9Mr.jpg?1