BullIso

A replacement Board for the Bully, incorporating an ISO-Enter. You can find the original bully here

Yet another link to the project: link

made by ScatteredDrifter ~Evelyn

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Measurements for the pcb were taken from the available plate-files.

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Image by Elia, whom I designed this for.

Current Status :

• prototypes produced and tested
• working as intended

Features :

• Rp2040 with EEPROM
• qmk / vial compatible
• optional pinouts(3) for further tinkering / features
• daughterboard-Support
• support for mx-switches
• production files ready for JLCPCB

Layout :

All available layouts are to be seen in the following image:

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Firmware ::

pre-compiled file for vial can be found in the "/firmware" section. To enter the bootloader - which is necessary in order to flash a new firmware - press the button next to the encoder on the back of the pcb and plug-it into your keyboard while keeping the button pressed. It should show up as a regular usb-stick in your file explorer now and you can drag the .uf2 onto this usb-stick. Once done it will restart and use your newly flashed firmware!

Building your own ::

On the verge to build this keyboard your own? For building one yourself you require the following:

• this pcb
• a unified daughterboard ( the old version with Jst-connectors)
• the correct case
• tadpole mounds ( just like for the original pcb)

Getting PCBs ::

I've ordered my prototypes at JLCPCB because they are easy work with and I've had my previous projects manufactured there. This is not an advertisement neither do I enforce the use of this vendor's service.

As of now the gerber-, BOM-, and Position-files are tailored towards the use with JLCPCB. All of them can be found in the following directory:

• production/assembly for both BOM and Positions
• production/gerber for the gerber files

I usually use JLCPCB for my prototypes, the procedure should be fairly similiar for other manufacturers however, and they require the bulliso_pcb_gerber.zip, which can be found in /production and for assembly of all SMD-components also their positions (pcb-bottom-pos.csv) and the BOM (BOM_pcb.csv) all of which can be found in the /production/assembly directory.