From 8e25479ab5db114f687918d3eb16d06bcf2ebdc5 Mon Sep 17 00:00:00 2001 From: Markus Koch Date: Tue, 2 Mar 2021 19:34:09 +0100 Subject: [PATCH] Add rev 01 errata to README --- README.MD | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/README.MD b/README.MD index 2683f8e..f3e8b89 100644 --- a/README.MD +++ b/README.MD @@ -1 +1,14 @@ # WS2812B light signal - CPU Board + +Board to run [colorchord2](https://github.com/cnlohr/colorchord) on a string of WS2812B LEDs with live line-in audio. + +## Errata (Rev 01) + +* Opamp inverting / non-inverting inputs are swapped + * Workaround: Lift pads 2 and 3, and 5 and 6, and connect them crossed using magnet wire. +* Opamp is not rail-to-rail and does not allow to use the ADC in full range + * Workaround: Only use limited range -640 to 520. +* LED footprint is wrong. + * Workaround: Flip 180 degrees and solder shifted onto the right pads, then use magnet wire to connect the remaining two pads. +* Serial boot loader non-functional (uses incompatible UART I/Os). + * Workaround: Program via JTAG / SWD.