Init

Author: dv1x3r

.vscode/arduino.json

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+{
+    "sketch": "sketch.ino",
+    "board": "arduino:avr:uno",
+    "port": "/dev/cu.usbmodem1441"
+}

.vscode/c_cpp_properties.json

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+{
+    "configurations": [
+        {
+            "name": "Mac",
+            "includePath": [
+                "/Applications/Arduino.app/Contents/Java/tools/**",
+                "/Applications/Arduino.app/Contents/Java/hardware/arduino/avr/**"
+            ],
+            "forcedInclude": [
+                "/Applications/Arduino.app/Contents/Java/hardware/arduino/avr/cores/arduino/Arduino.h"
+            ],
+            "macFrameworkPath": [
+                "/System/Library/Frameworks",
+                "/Library/Frameworks"
+            ],
+            "intelliSenseMode": "clang-x64",
+            "compilerPath": "/usr/bin/clang",
+            "cStandard": "c11",
+            "cppStandard": "c++17"
+        }
+    ],
+    "version": 4
+}

.vscode/settings.json

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+{
+    "files.associations": {
+        "cstddef": "cpp"
+    },
+    "python.pythonPath": "/usr/local/bin/python3"
+}

README.md

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+# Arduino Fan Display
+## Prototype lol
+
+DIY device I made using an Arduino Uno and some free time. Device was resurrected with brand new refactored firmware (a lot of time passed from the moment this device was originally created).  
+
+sketch.ino  - Arduino Sketch. outputArray contains binary image to be displayed.
+img2bin.py  - Python Script. Converts image to the outputArray format.  
+
+Each LED owns his own bit in int value (1led=1; 2led=2; 3led=4 e.t.c.). Sum of active bits is the value of vertical line to be displayed in one time unit.  
+Phototransistor checks for the new lap and triggers the controller using interrupts.
+
+* Proof that this one actually works:  
+![Oops. Image was here](https://github.com/DV1X3R/fan-display/raw/master/img/demo.gif)  
+
+* Photo  
+![Oops. Image was here](https://github.com/DV1X3R/fan-display/raw/master/img/photo.jpg)  
+
+* Schema  
+![Oops. Image was here](https://github.com/DV1X3R/fan-display/raw/master/img/schema.jpg)  

img/demo.gif

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+<mxfile userAgent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/7.9.5 Chrome/58.0.3029.110 Electron/1.7.5 Safari/537.36" version="9.1.2" editor="www.draw.io" type="device"><diagram name="Page-1" id="7e0a89b8-554c-2b80-1dc8-d5c74ca68de4">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</diagram></mxfile>

img/nudes.png

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+import sys
+from pathlib import Path
+from PIL import Image
+
+if len(sys.argv) > 1:
+    path = sys.argv[1]
+else:
+    path = str(Path.home()) + "/Sourcetree/fan-display/img/nudes.png"
+
+im = Image.open(path)
+px = im.load()
+
+print("Image Size: " + str(im.size))
+
+lines = []
+for w in range(0, im.size[0]):
+    line = 0
+    for h in range(0, im.size[1]):
+        line += 1 << h if px[w, h][0] == 0 else 0
+    lines.append(line)
+
+print("Array: " + str(lines))

img/photo.jpg

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+const byte TR = 2;								// Phototransistor pin
+const byte LEDS[8] = {10, 9, 8, 7, 6, 5, 4, 3}; //{3, 4, 5, 6, 7, 8, 9, 10}; // LED pins
+
+// Nudes
+byte outputArray[100] = {255, 1, 2, 4, 8, 16, 32, 64, 128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 73, 73, 73, 50, 0, 0, 127, 73, 73, 73, 0, 0, 127, 7, 28, 112, 127, 0, 0, 127, 65, 65, 62, 0, 0, 0, 0, 0, 127, 7, 28, 112, 127, 0, 0, 127, 64, 64, 127, 0, 0, 127, 65, 65, 62, 0, 0, 127, 73, 73, 73, 0, 0, 6, 73, 73, 73, 50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128, 64, 32, 16, 8, 4, 2, 1, 255};
+// Test
+//byte outputArray[100] = {129, 66, 36, 24, 24, 36, 66, 129, 66, 36, 24, 24, 36, 66, 129, 4, 4, 20, 20, 84, 80, 80, 64, 64, 64, 64, 0, 0, 0, 0, 0, 255, 9, 9, 9, 9, 0, 0, 126, 129, 129, 129, 129, 126, 0, 3, 14, 56, 96, 192, 96, 56, 14, 3, 0, 0, 0, 0, 0, 254, 130, 186, 170, 162, 190, 128, 255, 0, 0, 0, 0, 0, 0, 0, 64, 64, 64, 64, 80, 80, 84, 20, 20, 4, 4, 129, 66, 36, 24, 24, 36, 66, 129, 66, 36, 24, 24, 36, 66, 129};
+
+const unsigned long interruptLapBounceMcs = 50000; // prevent fake interrupts; 0,05s = 1200 RPM MAX; Larger bounce -> Lower Speed
+const byte extraStepsOffset = 5;				   // offset to display last array element
+
+volatile bool rotateLap = false;
+volatile unsigned long outputIndex = 0;
+volatile unsigned long timePerStep = 0;
+volatile unsigned long nextStepTime = 0;
+volatile unsigned long prevLapStartTime = 0;
+
+void lap()
+{
+	unsigned long itMicros = micros();
+	if (itMicros - prevLapStartTime > interruptLapBounceMcs)
+	{
+		outputIndex = 0;												  // reset output index
+		rotateLap = true;												  // trigger rotation
+		unsigned long lapTime = itMicros - prevLapStartTime;			  // calculate previous lap time
+		timePerStep = lapTime / (sizeof(outputArray) + extraStepsOffset); // one step time = (lap / (128 + delta)
+		prevLapStartTime = itMicros;									  // recotd new lap start time
+		nextStepTime = itMicros + timePerStep;							  // set next step time
+	}
+}
+
+void rotate()
+{
+	byte tmp = outputArray[0];
+	for (int i = 0; i < sizeof(outputArray) - 1; i++)
+		outputArray[i] = outputArray[i + 1];
+	outputArray[sizeof(outputArray) - 1] = tmp;
+}
+
+void setup()
+{
+	pinMode(TR, INPUT);										 // phototransistor init
+	attachInterrupt(digitalPinToInterrupt(TR), lap, RISING); // phototransistor (new lap checker) interrupt
+
+	for (int i = 0; i < sizeof(LEDS); i++)
+		pinMode(LEDS[i], OUTPUT); // leds init
+
+	//for (int i = 0; i < sizeof(outputArray); i++)
+	//outputArray[i] = i + 1;
+}
+
+void loop()
+{
+	unsigned long loopMicros = micros();
+	if ((loopMicros >= nextStepTime) && (outputIndex < sizeof(outputArray) - 1))
+	{ // current outputArray step update
+		nextStepTime = loopMicros + timePerStep;
+		outputIndex++;
+	}
+
+	if (rotateLap)
+	{ // text rotation
+		rotate();
+		rotateLap = false;
+	}
+
+	for (int i = 0; i < sizeof(LEDS); i++) // output cycle
+		digitalWrite(LEDS[i], ((1 << i) & outputArray[outputIndex]) != 0);
+}