Initial import

diff --git a/Fritzing/Hall-Effect-Sensor.fzz b/Fritzing/Hall-Effect-Sensor.fzz
new file mode 100644 (file)
index 0000000..57ba1d3
Binary files /dev/null and b/Fritzing/Hall-Effect-Sensor.fzz differ

diff --git a/Fritzing/parts/US1881UA_3394d811b1e61364d06f034ffbe599db_6.fzp b/Fritzing/parts/US1881UA_3394d811b1e61364d06f034ffbe599db_6.fzp
new file mode 100644 (file)
index 0000000..b68a8f3
--- /dev/null
+++ b/Fritzing/parts/US1881UA_3394d811b1e61364d06f034ffbe599db_6.fzp
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+<?xml version='1.0' encoding='UTF-8'?>
+<module moduleId="US1881UA_3394d811b1e61364d06f034ffbe599db_6" referenceFile="mystery_part_sip_3_100mil.fzp">
+ <version>4</version>
+ <author>Antonio Ospite</author>
+ <title>US1881 Hall effect sensor</title>
+ <label>U</label>
+ <date>mar mag 29 2018</date>
+ <tags>
+  <tag>sensor</tag>
+ </tags>
+ <properties>
+  <property name="variant">Variant 1</property>
+  <property name="family">Sensor</property>
+  <property name="chip label">US1881</property>
+  <property name="part number"></property>
+  <property name="pin spacing">100mil</property>
+  <property name="hole size"></property>
+  <property name="editable pin labels">false</property>
+  <property name="package">THT</property>
+  <property name="layer"></property>
+  <property name="pins">3</property>
+  <property name="layout">Single Row</property>
+ </properties>
+ <taxonomy>part.mystery.magical.3.pins</taxonomy>
+ <description>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
+&lt;html>&lt;head>&lt;meta name="qrichtext" content="1" />&lt;style type="text/css">
+p, li { white-space: pre-wrap; }
+&lt;/style>&lt;/head>&lt;body style=" font-family:'Cantarell'; font-size:11pt; font-weight:400; font-style:normal;">
+&lt;p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;">&lt;br />&lt;/p>&lt;/body>&lt;/html></description>
+ <views>
+  <iconView>
+   <layers image="icon/US1881UA_2d0ad8960d79f0a6ab217e6b43398fc3_2_icon.svg">
+    <layer layerId="icon"/>
+   </layers>
+  </iconView>
+  <breadboardView>
+   <layers image="breadboard/US1881UA_2d0ad8960d79f0a6ab217e6b43398fc3_2_breadboard.svg">
+    <layer layerId="breadboard"/>
+   </layers>
+  </breadboardView>
+  <schematicView>
+   <layers image="schematic/US1881UA_2d0ad8960d79f0a6ab217e6b43398fc3_2_schematic.svg">
+    <layer layerId="schematic"/>
+   </layers>
+  </schematicView>
+  <pcbView>
+   <layers image="pcb/US1881UA_2d0ad8960d79f0a6ab217e6b43398fc3_2_pcb.svg">
+    <layer layerId="silkscreen"/>
+    <layer layerId="copper0"/>
+    <layer layerId="copper1"/>
+   </layers>
+  </pcbView>
+ </views>
+ <connectors>
+  <connector id="connector0" type="male" name="VDD">
+   <description>Supply Voltage pin</description>
+   <views>
+    <breadboardView>
+     <p svgId="connector0pin" terminalId="connector0terminal" layer="breadboard"/>
+    </breadboardView>
+    <schematicView>
+     <p svgId="connector0pin" terminalId="connector0terminal" layer="schematic"/>
+    </schematicView>
+    <pcbView>
+     <p svgId="connector0pin" layer="copper0"/>
+     <p svgId="connector0pin" layer="copper1"/>
+    </pcbView>
+   </views>
+  </connector>
+  <connector id="connector1" type="male" name="GND">
+   <description>Ground pin</description>
+   <views>
+    <breadboardView>
+     <p svgId="connector1pin" terminalId="connector1terminal" layer="breadboard"/>
+    </breadboardView>
+    <schematicView>
+     <p svgId="connector1pin" terminalId="connector1terminal" layer="schematic"/>
+    </schematicView>
+    <pcbView>
+     <p svgId="connector1pin" layer="copper0"/>
+     <p svgId="connector1pin" layer="copper1"/>
+    </pcbView>
+   </views>
+  </connector>
+  <connector id="connector2" type="male" name="OUT">
+   <description>Output pin</description>
+   <views>
+    <breadboardView>
+     <p svgId="connector2pin" terminalId="connector2terminal" layer="breadboard"/>
+    </breadboardView>
+    <schematicView>
+     <p svgId="connector2pin" terminalId="connector2terminal" layer="schematic"/>
+    </schematicView>
+    <pcbView>
+     <p svgId="connector2pin" layer="copper0"/>
+     <p svgId="connector2pin" layer="copper1"/>
+    </pcbView>
+   </views>
+  </connector>
+ </connectors>
+</module>

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new file mode 100644 (file)
index 0000000..c293c75
--- /dev/null
+++ b/Fritzing/svg/US1881_PCB.svg
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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Fritzing (http://www.fritzing.org/) -->
+
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+    </g>
+  </g>
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diff --git a/Fritzing/svg/US1881_breadboard.svg b/Fritzing/svg/US1881_breadboard.svg
new file mode 100644 (file)
index 0000000..6b4c82c
--- /dev/null
+++ b/Fritzing/svg/US1881_breadboard.svg
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+<!-- Created with Fritzing (http://www.fritzing.org/) -->
+
+<svg
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diff --git a/Fritzing/svg/US1881_schematic.svg b/Fritzing/svg/US1881_schematic.svg
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+
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diff --git a/Tetramag-ring-magnet.svg b/Tetramag-ring-magnet.svg
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diff --git a/rotary_encoder/Makefile b/rotary_encoder/Makefile
new file mode 100644 (file)
index 0000000..cc24a34
--- /dev/null
+++ b/rotary_encoder/Makefile
@@ -0,0 +1,6 @@
+BOARD_TAG = uno
+MONITOR_PORT = /dev/ttyACM0
+
+ARDUINO_LIBS = DFRkeypad Encoder LiquidCrystal
+
+include /usr/share/arduino/Arduino.mk

diff --git a/rotary_encoder/rotary_encoder.ino b/rotary_encoder/rotary_encoder.ino
new file mode 100644 (file)
index 0000000..8515524
--- /dev/null
+++ b/rotary_encoder/rotary_encoder.ino
@@ -0,0 +1,75 @@
+/*
+ * Rotary encoder example
+ *
+ * Copyright (C) 2018  Antonio Ospite <ao2@ao2.it>
+ * SPDX-License-Identitier: WTFPL
+ */
+
+#include <DFRkeypad.h>
+#include <Encoder.h>
+#include <LiquidCrystal.h>
+
+#define ENCODER_CHANNEL_A 2
+#define ENCODER_CHANNEL_B 3
+
+#define COUNTS_PER_ROTATION 84
+
+#define LCD_RS 8
+#define LCD_EN 9
+#define LCD_D4 4
+#define LCD_D5 5
+#define LCD_D6 6
+#define LCD_D7 7
+#define LCD_BL 10
+
+#define BACKLIGHT_VALUE 1023
+
+long old_counts = 0;
+Encoder encoder(ENCODER_CHANNEL_A, ENCODER_CHANNEL_B);
+LiquidCrystal lcd(LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7);
+
+void setup() {
+       pinMode(LCD_BL, OUTPUT);
+       analogWrite(LCD_BL, BACKLIGHT_VALUE);
+
+       lcd.begin(16, 2);
+
+       lcd.setCursor(1, 0);
+       lcd.print("Rotary Encoder");
+       lcd.setCursor(1, 1);
+       lcd.print("https://ao2.it");
+
+       DFRkeypad::FastADC(true);
+       DFRkeypad::iDEFAULT_THRESHOLD=140;
+}
+
+void loop() {
+       byte key = DFRkeypad::GetKey();
+       if (key == DFRkeypad::eSELECT) {
+               encoder.write(0);
+       }
+
+       long new_counts = encoder.read();
+       if (new_counts != old_counts) {
+               old_counts = new_counts;
+
+               lcd.clear();
+
+               lcd.setCursor(0, 0);
+               lcd.print("Count: ");
+               lcd.setCursor(8, 0);
+               lcd.print(new_counts);
+
+               /* Position normalized between 0 and COUNTS_PER_ROTATION */
+               long position = ((new_counts % COUNTS_PER_ROTATION) + COUNTS_PER_ROTATION) % COUNTS_PER_ROTATION;
+
+               float angle = position * (360.0 / COUNTS_PER_ROTATION);
+
+               lcd.setCursor(0, 1);
+               lcd.print("Angle: ");
+               lcd.setCursor(8, 1);
+               lcd.print(angle);
+       }
+
+       delay(20);
+}

diff --git a/show_quadrature_states/Makefile b/show_quadrature_states/Makefile
new file mode 100644 (file)
index 0000000..7b0316f
--- /dev/null
+++ b/show_quadrature_states/Makefile
@@ -0,0 +1,6 @@
+BOARD_TAG = uno
+MONITOR_PORT = /dev/ttyACM0
+
+ARDUINO_LIBS = Encoder
+
+include /usr/share/arduino/Arduino.mk

diff --git a/show_quadrature_states/show_quadrature_states.ino b/show_quadrature_states/show_quadrature_states.ino
new file mode 100644 (file)
index 0000000..b44f0ad
--- /dev/null
+++ b/show_quadrature_states/show_quadrature_states.ino
@@ -0,0 +1,44 @@
+/*
+ * Show quadrature states of two Hall effect sensors.
+ *
+ * Copyright (C) 2018  Antonio Ospite <ao2@ao2.it>
+ * SPDX-License-Identitier: WTFPL
+ */
+
+#define HALL_CHANNEL_A 2
+#define HALL_CHANNEL_B 3
+#define LED_PIN 13
+
+int hall_state_A = 0;
+int hall_state_B = 0;
+
+int old_hall_state_A = -1;
+int old_hall_state_B = -1;
+
+void setup()
+{
+       pinMode(HALL_CHANNEL_A, INPUT);
+       pinMode(HALL_CHANNEL_B, INPUT);
+       pinMode(LED_PIN, OUTPUT);
+       Serial.begin(115200);
+}
+
+void loop()
+{
+       hall_state_A = digitalRead(HALL_CHANNEL_A);
+       hall_state_B = digitalRead(HALL_CHANNEL_B);
+
+       if (hall_state_A != old_hall_state_A ||
+           hall_state_B != old_hall_state_B)
+       {
+               digitalWrite(LED_PIN, hall_state_A);
+
+               old_hall_state_A = hall_state_A;
+               old_hall_state_B = hall_state_B;
+
+               Serial.print(hall_state_A);
+               Serial.print(" ");
+               Serial.print(hall_state_B);
+               Serial.print("\r\n");
+       }
+}