The Infinity 87.5 is in the popular A87 form factor with top-sided USB Type-C and supports BOTH the F12 and F13 footprints, so it is compatible with a number of TKL boards like Geonworks Frog/F1-8x, KFE-CE, and Singa Jaguar, among others.

Keyboard Maintainer: Mechlovin' Studio
Hardware Supported: Most H87C compatible keyboards
Hardware Availability: Mechlovin' Studio, GB, CBB Planet
Rev1: Atmega32u4 processor
Rev2: STM32F103

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

make mechlovin/infinity875/rev2:default

Flashing example for this keyboard:

make mechlovin/infinity875/rev2:default:flash

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:

Keycode in layout: Press the key mapped to QK_BOOT if it is available.
Bootmagic reset: Hold down the key at (0,0) in the matrix (Escape key relative to the default keymap) and plug in the keyboard.
Physical reset button: Briefly press the button on the back of the PCB.