From 8767108cb0957ed3fb0d90bfed366d20bbfaf30b Mon Sep 17 00:00:00 2001
From: Benjamin Koch <bbbsnowball@gmail.com>
Date: Tue, 16 May 2023 04:23:16 +0200
Subject: [PATCH] add correct reason for why the other MOSFET was working
during the first tests
---
README.md | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/README.md b/README.md
index 7f36536..03368c3 100644
--- a/README.md
+++ b/README.md
@@ -141,8 +141,9 @@ Errata for V1.0
with some fixup wires.
2. CJ2301 and AO3004 have high input capacity. That seems to break the voltage converter
for WS2812.
- - It worked on all boards in the initial test (no DCDC, supplied by USB) but EMI from
- the DCDC seems to be enough to break it on most boards.
+ - It worked on all boards in the initial test (no DCDC, supplied by USB) but this was most likely
+ because of the voltage drop on D5, i.e. the 5V were actually less than 5V, which is a known
+ method to make WS2812 work with lower voltage signals.
- **Hotfix**: Replace by BSS138. They are a known-good choice and fxk8y has some at hand.
- Fix is needed for Q7 but it would also be useful for Q3 and Q4.
--
GitLab