When I press a button on the NeoTrellis a whole row is activated

It's possible to accidentally "press" a column of four buttons even when you intend to only press one. This can happen when you press a button at an angle other than straight down on top of the button pad. The elastomer conductive part touches the NeoPixel ground pin against the column which makes the chip think the whole row/column is pressed. It only happens on some buttons and some angles, and is not common

It's not harmful, and there's a few ways to avoid it:

  • Press straight down on buttons not at an angle
  • Cut a thicker top panel from wood/plastic/3D printing so that the buttons cannot be pressed at an angle
  • Perform software filtering to remove the duplicate button presses

This guide was first published on Sep 20, 2018. It was last updated on Jul 10, 2024.

This page (F.A.Q.) was last updated on Mar 08, 2024.

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