Pumpkin Wiring Check

Paste the URL to your Cosmos configuration below, then the computer will do the work to figure out how to best fit the Pumpkin Patch PCB to your keyboard. This tool doesn't take into account Flex PCBs connected for the thumbs. It's only useful if you are trying to save money by wiring your keyboard with just one flex PCB per side.

The solver is pretty complete in terms of conservatively checking you can use the PCB as shown. It checks the distance from the microcontroller to the PCB, stretch distances between the horizontal cables on the bottom two rows (rows 0 and 1), and the stretching in the vertical cables. It also exhaustively searches every single possible PCB configuration and finds the shortest one. For these reasons it can be pretty slow, especially on large keyboards.

If you are trying to use this tool on a large keyboard, I suggest you ignore what the computer is trying to do and instead analyze the arrows on your screen. There is an arrow drawn for every possible column connection. If there is no arrow pointing towards a key, then it cannot be hooked up to any column. An easy way to solve this issue in the thumb cluster is to rotate keys 90 degrees. The LED placement will be a little awkward, but you'll be able to easily add it to the matrix.

The (0,0) matrix position indicates the key on the bottom corner of the Pumpkin PCB next to the flex cable. Columns are marked in distinct colors. The diagrams are shown top-down (dark side of the PCB up), so when you are wiring your keyboard upside-down you should mentally flip the diagram.