this post was submitted on 23 Jul 2023
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ErgoMechKeyboards

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Ergonomic, split and other weird keyboards

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I just build my redox keyboard and I found a problem about the right hand side is not working when connecting via the TRRS cable

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[–] danieldk@lemmy.world 3 points 1 year ago

The soldering work looks pretty rough (practice on a throwaway project first). Probably one of the TRRS or MCU pins is not well connected. Get out a multimeter and do a continuity check of all the connections. It could also be misconfiguration of QMK, but make sure the basics (hardware connections) are right first.

[–] panpun1996@lemmy.world 2 points 1 year ago

This is my picture of my PCB

[–] Tompi@discuss.tchncs.de 1 points 1 year ago (1 children)

Im not familiar with the redox, but i see you got two unpopulated resistor footprints around the trrs connector.

Are you sure the resistors are optional?

[–] obosob@feddit.uk 2 points 1 year ago (1 children)

I think this is the answer, there might be more issues with the state of the soldering but the build guide says it needs them (indicating they're using i2c for split comms).

OP needs to add 2x 4.7kOhm resistors on one half of the keyboard.

[–] ink_black_night@lemmy.world 1 points 1 year ago* (last edited 1 year ago)

This. I built the redox and you do need those resistors, but only on one side if I do not remember wrong

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