Media Control Knob

prusaprinters

<h4>Intro</h4> <p>Media Control Knob inspired by Mikolas Zuza design:<br/> <a href="https://blog.prusaprinters.org/3d-print-an-oversized-media-control-volume-knob-arduino-basics/">https://blog.prusaprinters.org/3d-print-an-oversized-media-control-volume-knob-arduino-basics/</a></p> <p>I've changed the enclosure, code and used digispark instead of arduino so it's hard to call it a remix.</p> <p>Because I've reached 100 subscribers on YouTube and I'm very happy about it you can win one of these, just enter the giveaway here:<br/> <a href="https://kingsumo.com/g/iwjfoi/3d-printed-media-control-knob-medyk3d-100-subs-on-youtube">https://kingsumo.com/g/iwjfoi/3d-printed-media-control-knob-medyk3d-100-subs-on-youtube</a></p> <h4>My video about this item:</h4> <p><a href="https://www.youtube.com/watch?v=acIH6Y_1LRc">youtube.com/watch?v=acIH6Y_1LRc</a></p> <h4>What it can do?</h4> <p>By default pressing the knob is play/pause button, rotating changes the volume, and rotating the knob with button pressed changes the track.<br/> You can modify the left() right() and click() functions to suit your needs.</p> <h4>BOM</h4> <p>Stuff I've used (affiliates links, you pay nothing extra, I get some change):<br/> Encoder ($ 0.5)<br/> <a href="http://s.click.aliexpress.com/e/_dSqXwoQ">http://s.click.aliexpress.com/e/\_dSqXwoQ</a></p> <p>Digispark - choose the blue one ($ 1.3)<br/> <a href="http://s.click.aliexpress.com/e/_dYKzAK2">http://s.click.aliexpress.com/e/\_dYKzAK2</a></p> <p>USB cable.<br/> 3D printed lower and upper cover - about 27 grams of filament (3 hours with 0.2 layer).</p> <h4>The code</h4> <p>How to configure Arduino IDE for Digispark:<br/> <a href="https://digistump.com/wiki/digispark/tutorials/connecting">https://digistump.com/wiki/digispark/tutorials/connecting</a><br/> Add Trinket USB Keyboard library:<br/> <a href="https://learn.adafruit.com/trinket-usb-volume-knob/code">https://learn.adafruit.com/trinket-usb-volume-knob/code</a></p> <p>Uploading the code is easy but first you need to follow the instructions from digisaprk on how to add it to arduino IDE if you haven't already.<br/> After installing all what's left is to hit upload button and plug the digisaprk using a USB cable.</p> <p>After a while the multimedia knob is ready to use.</p> <p>If you want to change the rotation direction just switch PIN_ENCODER_A and PIN_ENCODER_B in the code.</p> <h4>Assembly</h4> <p>You will need:<br/> wires, wire cutters, digispark, encoder, soldering iron, something to desolder pins from encoder, hot glue, a file, 3D printed parts, usb cable.</p> <p>First prepare the wires cut 5 pieces to about 2,5 cm(1inch) length and cover the end with solder.<br/> Desolder the pins from the encoder.<br/> Round over the edges of digispark with a file, be careful not to damage the USB socket.<br/> Now connect the encoder with the digispark in my case I'm using black wire for GND, red for 5V, these are really important, so be sure to connect them properly.<br/> The next three wires are:<br/> blue for switch,<br/> green and yellow for encoder A and B outputs. These are not super important you can always change them in the software.<br/> In any case there is the schematic if you need one.<br/> You need to remove the LED.</p> <p>It's a good idea to add something non slippery to the bottom so you can rotate the knob easily.<br/> Pure PLA just slides way to easy on the desk surface.</p> <h4>Source code</h4> <h3>include "TrinketHidCombo.h"</h3> <h3>define PIN_SWITCH 0</h3> <h3>define PIN_ENCODER_A 2</h3> <h3>define PIN_ENCODER_B 1</h3> <p>bool switchState = HIGH;<br/> bool encoderAState = HIGH;<br/> bool encoderBState = HIGH;<br/> bool previousSwitchState = HIGH;<br/> bool previousEncoderAState = HIGH;<br/> bool previousEncoderBState = HIGH;<br/> bool canClick = true;</p> <p>// the setup routine runs once when you press reset:<br/> void setup() {<br/> pinMode(PIN_SWITCH, INPUT);<br/> pinMode(PIN_ENCODER_A, INPUT);<br/> pinMode(PIN_ENCODER_B, INPUT);</p> <p>digitalWrite(PIN_SWITCH, HIGH);<br/> digitalWrite(PIN_ENCODER_A, HIGH);<br/> digitalWrite(PIN_ENCODER_B, HIGH);</p> <p>TrinketHidCombo.begin(); // start the USB device engine and enumerate</p> <p>encoderAState = digitalRead(PIN_ENCODER_A);<br/> encoderBState = digitalRead(PIN_ENCODER_B);<br/> previousSwitchState = switchState;<br/> previousEncoderAState = encoderAState;<br/> previousEncoderBState = encoderBState;<br/> }</p> <p>// the loop routine runs over and over again forever:<br/> void loop() {<br/> bool wasChanged = false;</p> <p>previousSwitchState = switchState;<br/> previousEncoderBState = encoderBState;<br/> previousEncoderAState = encoderAState;</p> <p>bool switchStateReading = digitalRead(PIN_SWITCH);<br/> bool encoderAStateReading = digitalRead(PIN_ENCODER_A);<br/> bool encoderBStateReading = digitalRead(PIN_ENCODER_B);</p> <p>delayMicroseconds(750);</p> <p>if(digitalRead(PIN_SWITCH) == switchStateReading &amp;&amp; switchStateReading != switchState)<br/> {<br/> switchState = switchStateReading;<br/> wasChanged = true;<br/> if(switchState == LOW)<br/> {<br/> canClick = true;<br/> }<br/> }</p> <p>if(digitalRead(PIN_ENCODER_A) == encoderAStateReading &amp;&amp; encoderAStateReading != encoderAState)<br/> {<br/> encoderAState = encoderAStateReading;<br/> wasChanged = true;<br/> }</p> <p>if(digitalRead(PIN_ENCODER_B) == encoderBStateReading &amp;&amp; encoderBStateReading != encoderBState)<br/> {<br/> encoderBState = encoderBStateReading;<br/> wasChanged = true;<br/> }</p> <p>if(wasChanged == true)<br/> {<br/> if(encoderAState == LOW &amp;&amp; encoderBState == LOW)<br/> {<br/> if(previousEncoderAState == HIGH &amp;&amp; previousEncoderBState == LOW)<br/> left(switchState);<br/> if(previousEncoderAState == LOW &amp;&amp; previousEncoderBState == HIGH)<br/> right(switchState);<br/> }</p> <pre><code>if(encoderAState == HIGH &amp;&amp; encoderBState == HIGH) { if(previousEncoderAState == LOW &amp;&amp; previousEncoderBState == HIGH) left(switchState); if(previousEncoderAState == HIGH &amp;&amp; previousEncoderBState == LOW) right(switchState); } if(switchState == HIGH &amp;&amp; previousSwitchState == LOW) click(); </code></pre> <p>}<br/> TrinketHidCombo.poll();<br/> delayMicroseconds(1000);<br/> }</p> <p>void left(bool switchState){<br/> canClick = false;<br/> if(switchState)<br/> TrinketHidCombo.pressMultimediaKey(MMKEY_VOL_DOWN);<br/> else<br/> TrinketHidCombo.pressMultimediaKey(MMKEY_SCAN_PREV_TRACK);<br/> }</p> <p>void right(bool switchState){<br/> canClick = false;<br/> if(switchState)<br/> TrinketHidCombo.pressMultimediaKey(MMKEY_VOL_UP);<br/> else<br/> TrinketHidCombo.pressMultimediaKey(MMKEY_SCAN_NEXT_TRACK);<br/> }</p> <p>void click(){<br/> if(canClick)<br/> TrinketHidCombo.pressMultimediaKey(MMKEY_PLAYPAUSE);//MMKEY_MUTE<br/> }</p> <h3>Print instructions</h3><p><strong>Rafts:</strong> No<br/> <strong>Supports:</strong> No<br/> <strong>Resolution:</strong> 0,2<br/> <strong>Infill:</strong> 30%<br/> <strong>Filament:</strong> [ Fiberlogy Fibersilk PLA ]White/Silver<br/> <strong>Notes:</strong></p> <p>You need to print:<br/> 1x LowerBodyBiggerHole_v4<br/> 1x UpperCoverBiggerSmooth_v4 or<br/> UpperCoverBiggerKnurling_v4 or<br/> UpperCoverBiggerVertCuts_v4<br/> Print them flat side facing down.</p>