From 33a2af7c697cc21a37e73907d725f3caec217057 Mon Sep 17 00:00:00 2001
From: dakkar <dakkar@thenautilus.net>
Date: Thu, 20 Aug 2020 16:19:29 +0100
Subject: the other board

---
 wiring.rst.txt | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 wiring.rst.txt

(limited to 'wiring.rst.txt')

diff --git a/wiring.rst.txt b/wiring.rst.txt
new file mode 100644
index 0000000..9280536
--- /dev/null
+++ b/wiring.rst.txt
@@ -0,0 +1,41 @@
+25 sensors
+
+5 rows × 5 columns
+
+pins (`see SparkFun`_)::
+
+  14
+  23
+
+1. phototransistor collector, to pull-up for row
+2. phototransistor emitter, to ground for column
+3. led anode, to limiter for row
+4. led cathode, to ground for column
+
+so…
+
+::
+
+   aM aM aM aM aM cN cN cN cN cN
+   14 14 14 14 14 14 14 14 14 14 …
+   23 23 23 23 23 23 23 23 23 23 …
+   Mb Mb Mb Mb Mb Nd Nd Nd Nd Nd
+
+
+      /---------- input1
+   a -+-10kΩ--+- output1
+   b ---220Ω--/
+
+      /---------- input2
+   c -+-10kΩ--+- output2
+   d ---220Ω--/
+
+   …
+   …
+
+   M ------------ output6
+   N ------------ output7
+
+
+.. `see SparkFun`:
+   https://learn.sparkfun.com/tutorials/qrd1114-optical-detector-hookup-guide/all
-- 
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