LEDs on a handwired keyboard

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blackchoco09

02 Dec 2017, 18:53

So I am currently working on a slightly modified AMJ40 layout keyboard using a Pro Micro and only have one spare pin left for the backlight (if it is any possible).

On kbfirmware.com I can select that pin for backlight but how do I exactly wire it up? Should I wire each column in series then wire all the columns in parallel?

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