From 4c9eb37337fc5658288de737c64860906c3a4e3e Mon Sep 17 00:00:00 2001
From: Astrid Smith
Date: Sun, 18 Sep 2011 20:28:29 -0700
Subject: Stabilized the read slightly, added a diagram

---
 circuit.txt | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 circuit.txt

(limited to 'circuit.txt')

diff --git a/circuit.txt b/circuit.txt
new file mode 100644
index 0000000..408f8ee
--- /dev/null
+++ b/circuit.txt
@@ -0,0 +1,21 @@
+
+                           +-------------------+
+                           |                   |
+                       +----)------------+     |
+                       |   |             |     |
+                       |   +-------+     |     |     +---------+----o  Digital output
+                       |   |       |     |     |     |         |
++24V ac  o---\/\/\/\/--+   |       __    __    __    __        |
+               10K     |   |      |  |  |  |  |  |  |  |       |
+                       |   |   +--------------------------+    |
+                       |   |   |   |     +--|(+)\    |    |    \
+           Voltage     |   |   |   |        |    >---+   /     / Pull-up resistor
+           Divider     |   |   |   +--------|(-)/       |      \     ~10K
+                       |   |   |                         \     /
+                       |   |   |   Comparator (NS M8830)  |    \
+                       |   |   +--------------------------+    |
+                       |   |      |__|  |__|  |__|  |__|       |
+-24V ac  o-+-\/\/\/\/--+   |                         |         |
+           |    1K         |                         +---------+----o  Digital +5V
+           |               |
+           +---------------+----------------------------------------o  Digital ground
-- 
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