From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Tue, 5 Mar 2013 12:54:34 +0000 (+0100)
Subject: Handlebar switches
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=bike-lights.git;a=commitdiff_plain;h=b643acf48495199cc7b0d1bfdacbd9921cab4fde

Handlebar switches

I have decided to implement a brake light, which I want to trigger using
Hall-effect sensor mounted in the brake lever. Unfortunately I still
have only three wires for two switches and a Hall-effect sensor, so I
would have to change the digital switch readings (on/off) to ADC
readings (voltages selected using voltage split on resistors).

Here is the schematics for the whole handlebar electronics, and the
symbol file and datasheet for the Honeywell SS341RT Hall-effect sensor.
---

diff --git a/datasheets/ss341rt.pdf b/datasheets/ss341rt.pdf
new file mode 100644
index 0000000..f640016
Binary files /dev/null and b/datasheets/ss341rt.pdf differ
diff --git a/schematics/hall-1.sym b/schematics/hall-1.sym
new file mode 100644
index 0000000..8a0caa7
--- /dev/null
+++ b/schematics/hall-1.sym
@@ -0,0 +1,51 @@
+v 20121123 2
+P 600 900 600 700 1 0 0
+{
+T 500 750 5 6 1 1 0 0 1
+pinnumber=1
+T 800 1050 5 6 0 0 0 0 1
+pinseq=1
+T 700 750 5 6 0 1 0 0 1
+pinlabel=+
+T 800 950 5 6 0 0 0 0 1
+pintype=pas
+}
+P 600 300 600 100 1 0 1
+{
+T 500 150 5 6 1 1 0 0 1
+pinnumber=3
+T 800 250 5 6 0 0 0 0 1
+pinseq=3
+T 700 150 5 6 0 1 0 0 1
+pinlabel=-
+T 800 150 5 6 0 0 0 0 1
+pintype=pas
+}
+P 200 500 400 500 1 0 0
+{
+T 300 550 5 6 1 1 0 0 1
+pinnumber=2
+T 100 1050 5 6 0 0 0 0 1
+pinseq=2
+T 200 350 5 6 0 1 0 0 1
+pinlabel=Out
+T 100 950 5 6 0 0 0 0 1
+pintype=out
+}
+T 900 500 8 10 1 1 0 0 1
+refdes=U?
+T 1500 1100 9 10 0 0 0 0 1
+device=SS34x
+T 1500 900 9 10 0 0 0 0 1
+description=Hall-effect sensor
+T 1500 300 9 10 0 0 0 0 1
+footprint=SOT-23
+T 1500 700 9 10 0 0 0 0 1
+author=Jan "Yenya" Kasprzak <kas@fi.muni.cz>
+T 1500 100 9 10 0 0 0 0 1
+datasheet=http://sensing.honeywell.com/honeywell-sensing-ss340rt-ss440r%20series-productsheet.pdf
+T 1500 500 9 10 0 0 0 0 1
+dist-license=GPL 2
+B 400 300 400 400 3 0 0 0 -1 -1 0 -1 -1 -1 -1 -1
+L 500 600 700 400 3 0 0 0 -1 -1
+L 700 600 500 400 3 0 0 0 -1 -1
diff --git a/schematics/handlebar.sch b/schematics/handlebar.sch
new file mode 100644
index 0000000..6eafd25
--- /dev/null
+++ b/schematics/handlebar.sch
@@ -0,0 +1,99 @@
+v 20121123 2
+C 40000 40000 0 0 0 title-B.sym
+C 49900 44900 1 0 0 hall-1.sym
+{
+T 50800 45400 5 10 1 1 0 0 1
+refdes=U1
+T 50800 45200 5 10 1 1 0 0 1
+device=SS34x
+T 51400 45200 5 10 0 0 0 0 1
+footprint=SOT-23
+T 50800 45000 5 10 1 1 0 0 1
+description=Hall-effect sensor
+}
+C 49100 46500 1 270 0 switch-spst-1.sym
+{
+T 49800 46100 5 10 0 0 270 0 1
+device=SPST
+T 49400 46200 5 10 1 1 270 0 1
+refdes=S2
+}
+C 48300 46500 1 270 0 switch-spst-1.sym
+{
+T 49000 46100 5 10 0 0 270 0 1
+device=SPST
+T 48600 46200 5 10 1 1 270 0 1
+refdes=S1
+}
+C 45800 45900 1 0 0 connector3-1.sym
+{
+T 47600 46800 5 10 0 0 0 0 1
+device=CONNECTOR_3
+T 45800 47000 5 10 1 1 0 0 1
+refdes=CONN1
+}
+C 49000 47800 1 270 0 resistor-2.sym
+{
+T 49350 47400 5 10 0 0 270 0 1
+device=RESISTOR
+T 49300 47600 5 10 1 1 270 0 1
+refdes=R1
+T 49300 47300 5 10 1 1 270 0 1
+value=1M5
+}
+C 49000 45500 1 270 0 resistor-2.sym
+{
+T 49350 45100 5 10 0 0 270 0 1
+device=RESISTOR
+T 49300 45300 5 10 1 1 270 0 1
+refdes=R2
+T 49300 45000 5 10 1 1 270 0 1
+value=300K
+}
+C 49800 46500 1 270 0 resistor-2.sym
+{
+T 50150 46100 5 10 0 0 270 0 1
+device=RESISTOR
+T 50100 46500 5 10 1 1 270 0 1
+refdes=R3
+T 50100 46200 5 10 1 1 270 0 1
+value=150K
+}
+N 47900 46400 47900 48000 4
+N 47900 48000 50500 48000 4
+{
+T 46400 46500 5 10 1 1 0 0 1
+netname=PA3 (SW2/+5V)
+}
+N 47500 46100 47500 44400 4
+N 47500 44400 50500 44400 4
+{
+T 46400 46200 5 10 1 1 0 0 1
+netname=GND
+}
+N 50500 48000 50500 45800 4
+N 50500 45000 50500 44400 4
+N 47500 46700 49900 46700 4
+{
+T 46400 46800 5 10 1 1 0 0 1
+netname=PA4 (SW1/ADC3)
+}
+N 48300 46700 48300 46500 4
+N 48300 45700 48300 44400 4
+N 49100 48000 49100 47800 4
+N 49900 45600 49900 45400 4
+N 49900 45400 50100 45400 4
+N 49900 46700 49900 46500 4
+N 49100 46700 49100 46900 4
+N 49100 45700 49100 45500 4
+N 49100 44600 49100 44400 4
+T 50900 41000 9 16 1 0 0 0 1
+http://www.fi.muni.cz/~kas/bike-lights/
+T 50500 40700 9 10 1 0 0 0 1
+Distributable under the terms of GNU General Public LIcense, version 2
+T 54200 40200 9 14 1 0 0 0 1
+Jan "Yenya" Kasprzak
+N 47500 46400 47900 46400 4
+N 49100 46700 49100 46500 4
+T 45700 48600 9 24 1 0 0 0 1
+Handlebar buttons & brake sensor