From 52eee6a569fb224ab21fce436f1ac1e793cfd13b Mon Sep 17 00:00:00 2001 From: Serge Bazanski Date: Wed, 11 Oct 2023 17:21:09 +0200 Subject: [PATCH] README: clean up layout --- README.md | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index d1225c8..3ddb575 100644 --- a/README.md +++ b/README.md @@ -16,6 +16,8 @@ Schematic of 2.0: https://reprap.org/mediawiki/images/7/7d/Melzi-circuit.png EXP connector: ---- +On the mainboard: + PC1 | 1 2 | PA1 PC0 | 3 4 | PA2 PD3 | 5 6 | PA3 @@ -23,7 +25,7 @@ EXP connector: VCC | 9 10 | GND LCD board -=== +--- | EXP Pin | AVR Pin | AVR Function | Screen board function | |---------|---------|--------------|-----------------------| @@ -39,6 +41,8 @@ LCD board Button Matrix --- +On the LCD board. + Based on a voltage divider between button(s) pressed and a constant pull-up to VCC. Resistor to VCC: 4.7k