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authorMatthias P. Braendli <matthias.braendli@mpb.li>2020-12-18 11:50:43 +0100
committerMatthias P. Braendli <matthias.braendli@mpb.li>2020-12-18 11:50:43 +0100
commite1ea7ade49ad3f8d7a8667245f96db4773246f4f (patch)
tree77c52ec3a1c9e0df8bcf47e892fd5bcd4f06f730 /kicad/control.sch
parent18bcf61935b1d27d83ce03a490789365da799592 (diff)
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Simplify buttons input
Diffstat (limited to 'kicad/control.sch')
-rw-r--r--kicad/control.sch2
1 files changed, 1 insertions, 1 deletions
diff --git a/kicad/control.sch b/kicad/control.sch
index e4c2a32..e6f453a 100644
--- a/kicad/control.sch
+++ b/kicad/control.sch
@@ -80,7 +80,7 @@ Wire Wire Line
Text HLabel 6500 7100 2 50 Output ~ 0
CW_TONE
Text Notes 650 2600 0 50 ~ 0
-LCD: use a 5V character display, and Adafruit 292 backpack with 3V3 I2C.\nButtons 0 and 1: floating when open, connect to GND through resistors\nwhen pressed for multiplexing several buttons.\nButtons 2 and 3: floating when open, connect to GND when pressed\nCoder: connect as in datasheet PEC12R
+LCD: use a 5V character display, and Adafruit 292 backpack with 3V3 I2C.\n\nButtons: floating when open, connect to GND when pressed\n(Buttons 0 and 1 were previously floating when open, connect to GND\nthrough resistors when pressed for multiplexing several buttons, but that\nmakes it impossible to use interrupts, and I didn't need more than 4\nbuttons in the end.)\n\nCoder: connect as in datasheet PEC12R
$Comp
L mpb:CUI-SJ-3524-SMT-TR J202
U 1 1 5EF19C71