Minivan keyboard layout editor1/15/2024 The firmware is written to scan for keypresses with two nested loops. QMK firmware (and its predecessor TMK) rely on a grid-like layout of switches - known as a "matrix" - where the keys on the board are wired into rows and columns. To understand how port scanning works, let's first take a look at how most keyboard firmwares detect key presses. Ketch implements a new key press detection method dubbed "port scanning". >6.25u spacebars and JISVan Enter do not have PCB-mount stab holes due to conflicts with nearby traces and switches so plate-mount stabilizers must be used for both of those keys. The board includes several unique switch locations such as a new centered position for spacebars up to 12.75u as well as an switch position located between the far-right keys on the middle rows to support the "JISVan" layout. This can possibly be resolved by desoldering the extra LEDs from Ketch but nobody has tested this. The remaining seven RGB LEDs on Ketch will interfere with the plate and prevent assembly. MHKB has a 5.1mm thick switch plate with three notches in the underside to accommodate the indicator LEDs on the MiniVan-HS PCB. Ketch is not compatible with MHKB cases due to the extra indicator LEDs. These LEDs are positioned in the same manner as the LEDs seen on the MiniVan HS PCB. There is no LED between the last 2 switches as it would interfere with the USB C port. There are 10 surface-mount RGB LEDs located between the first 11 switches in the top row. All switches are oriented in the south-facing position, although there are no through-hole pads for in-switch LEDs for any of the switch locations. Ketch uses a USB C port for its connection to the host computer.
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