Arduino Player Piano

thingiverse

A cutting-edge Player Piano created with an Arduino Mega 2560 that can play 7 diverse songs! Song list: Auld Lang Syne, Harry Potter Theme, Final Countdown, Song of Storms, Song of Healing, Star Wars Theme, Lost Woods Watch the video demonstration: (Same as the 2nd preview image)https://www.youtube.com/watch?v=GJRJ3bxSmyQ Instructions This project is best suited for experts. You'll need to be familiar with your 3D Printer, Arduino programming and soldering. Required Components Arduino Mega 2560 (You must use this model because you require at least 25 I/O pins) ProtoShield for Arduino Mega 2560 (Highly recommended) (Example ) 12 LEDs (I used 6 different colors) 12 Resistors with the correct resistance for your LEDs 12 Tall Tactile Switches (Example ) 1 Momentary (normally open) push button switch with a 12mm diameter hole (Example ) 13 10k Resistors (For your switches) 2 Speakers - 8ohm - low wattage - 30mm diameter (Example ) 1 Power jack with a 12mm diameter (Example ) AC/DC adapter to fit that power jack with suitable voltage for Arduino (7-12V DC) 1 Power plug to fit into Arduino (Example ) Lots of tiny wire of various colors Glue: I used a combination of hot glue and super glue Soldering Iron + Solder STEP 0: Download files Download all the STL files Download Piano_sketch.zip - extract it to your computer and open up Piano.ino (this is the sketch file for the piano's programming) Read through the sketch file and see if you can understand how this project is programmed. Understanding the programming should help in building the piano. And then, of course, load the sketch onto your Arduino. STEP 1: Print the pieces Note: I printed the piano body white and the keys black so that the LEDs shine through the brightest. If you print the piano in a darker color or paint it, the LEDs may not be very bright. Print Key.STL 12 times. Print Button_holder_support.STL 7 times. Print the Legs 2 times. STEP 2: Assemble the pieces Wire up the buttons using this method: Simple Arduino Button When wiring the tactile switches, if you choose to wire them all together and to the 5v output from the Arduino like I did, keep in mind that you'll need enough room to slide the button_holder_support pieces in so make sure you use longer lengths of wire (see the picture below) For the LEDs, a wire goes from each Arduino pin to the positive lead on the LED, then a resistor from the negative lead and then to the ground. For the speakers, it's just a wire going from the Arduino pin to the positive terminal on the speaker and then a wire from the negative terminal on the speaker to the ground. IMPORTANT: These are the Arduino pins I used: Speaker 1: Pin 10 Speaker 2: Pin 11 Piano key buttons: [from left (low) to right (high)] 22,24,26,28,30,32,34,36,38,40,42,44 LEDs: [from left (low) to right (high)] 23,25,27,29,31,33,35,37,39,41,43,45 Top button that starts a song: Pin 50 I made the mistake of wiring up all the buttons and LEDs in reverse order so be mindful of that when you're wiring everything up. If you look carefully at this picture, it should help you figure out the wiring. STEP 3: Final touches Next, glue on the Legs. I used super glue for this. And then glue on all the piano keys (or leave them small and round if you want) I used super glue for this too, using just a very little amount. I attached the back piece with some masking tape so it would be easy to remove (if I needed to fix something or use the Arduino for another project) I also put tiny felt furniture pads on the bottom of it so it would be more stable.