Instructables

The Octo-phonic Synthesizer

Featured
Picture of The Octo-phonic Synthesizer
IMG_4783.jpg
The Octo-phonic Synthesizer is a polyphonic synthesizer that is able to produce eight tones that in the end, creates a musical scale. Inspiration for this creation came from this project. I like to think of it as an electronic organ. I used the core foundation of blinkyblinky's idea, but also focused more in detail to the craftsmanship of the housing of the actual synthesizer and the other parts.  This project is made possible by using the Arduino micro-controller. Joe Marshall wrote the code for this project. 

PARTS/TOOLS NEEDED

- Arduino Uno micro-controller
- Copper plating of some kind I used copper-plated fiberglass boards, since they can be cut relatively easily)
- Something to use as the base unit for the synthesizer (I used a cut of a floor molding)
- Epoxy (I used 5-minute epoxy)
- Headers (1 six-pin male header, 1 two-pin male header, 1 4-pin male header)
- 1 barrel plug-to-9-volt-battery coupling 
- 1 9-volt battery
- sandpaper
- wire
- speaker(s)
- utility knife
- box of some kind to house arduino and speaker (I used a wooden, craft storage box)
- spray paint 
- soldering gun 
- solder
- velcro strips
 
Remove these adsRemove these ads by Signing Up

Step 1: Step 1 - Copper Keys

Picture of Step 1 - Copper Keys
IMG_4801.JPG
IMG_4803.jpg
IMG_4797.jpg
Cut your copper plates to the size that you desire. Since I was trying to make something similar in size to piano keys, I cut mine about 2 cm wide, by about 10 cm long. However, as long as all of your  8 copper keys can fit on your base unit, the size is up to you. Once you cut your copper keys to size, take a medium-grade sandpaper and sand the rough edges so the keys are smooth to the touch. 
What gauge wire
jensenr301 year ago
This seems really neat. I'm going to have to try this out!
The only suggestion I have is that you might upload the .ino file instead of copy-pasting the code into one step. that does make it kind of lengthy. xD
Other than that, this project looks awesome! keep it up!