Project C=BOARD

Project C=BOARD
The goal of this project is to modify a Commodore 64 computer so that in addition to being a computer it is also a rockin musical instrument.

I'd like to thank the following folks who made this possible:
Nak - For his paddle design (though it was a wee bit off)
sch�nberger - for inspiring me to actually wear my C64
tomtiki for giving me correct schematics.
And finally Paul Slocum for making Cynthcart

DISCLAIMER!!! If you are not sure what you are doing ask someone for help. I am not responsible for any damage done to your C64, cherished childhood memories, or person, if you follow some or all of these directions. Be careful with electronics and ALWAYS UNPLUG THEM when working on them.

For this project you will need the following:
A Commodore 64 (any model)
A Soldering Iron
Some wires (color coded is good, though mine is not)
A Cynthcart cartridge (these can often be found on ebay)
2 500k Potentiometers
A guitar strap
2 1/4 inch nuts and bolts
6 Washers (big enough to fit on a 1/4 inch bolt)
Some paint to make your C=BOARD fancy!

Here's a sample MP3: Noise in A
And another 8bit2, this one also features a Korg DS10
 
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Step 1So, exactly what are we doing?

So, exactly what are we doing?
Here's the plan. by the end of this we will have made the following modifications to a c64:

1. Get Cynthcart
If you just want to make music on your C64 this is the simplest way. Cynthcart is a solid sta6te cartridge that makes your c64 a synthesizer when you boot with it inserted. Most of the controls in Cynthcart can be done with the keyboard, though adding some knobs helps with certain aspects of it. Cynthcart can usually be found on Ebay, I got mine for a little over $20.

2. Paint it
Again, this is optional, but if you are going through all this trouble to mod your c64 you might as well give it a little war paint.

3. Add a strap
Sure, you could just sit it on a table and play it, but to truly rock out you need to WEAR an instrument. Thus the C=BOARD is also a C=TAR.

4. Add 2 control knobs
These knobs will be used by Cynthcart for a few different functions. While most of this can be done just using the keyboard, the knobs give you greater control and easier more analog input.
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24 comments
Aug 4, 2011. 2:39 AMdoomsdayltd says:
how are the cynthcards? im thinking of getting a MSSIAH card for my c64
Aug 4, 2011. 1:58 PMdoomsdayltd says:
well i would like the portability of the Cynthcard but again i've seen the features for a MSSIAH. pff oh well this is just an instructable to make a c64 keytar, but yea thanks for clearing things up for me :D
Jun 7, 2010. 8:10 PMEZtrollin says:
i was so planning on doing this before :( i thought i had an original idea, kudos to you though
May 12, 2010. 11:58 PMdphc says:
Sweet, and you can still use it as a regular C=64!  The music samples are great too, sounds like it's straight out of an 80s game.  Does your cat Tidbit jam with you? :)
Feb 22, 2010. 4:34 PMdatenkrieger says:
Nice one, very inspiring. Just got a cynthcart, built a knob box and checking out the sounds that can be made. Gonna add the feedback mod - routing the audio out through a 500K pot back into audio in - for some screaming self-oscillation.
Maybe routing some gameboy percussion through the filter...
But my C128 is too heavy for a keytar, need to get myself a C64. Too bad, they dont seem to be really cheap anymore (on ebay at least).
Feb 3, 2010. 9:23 AMFenwick says:
Love the paint job.
Dec 2, 2009. 9:02 AMMicroscope says:
So I've added the pots and it doesn't seem to work.  When I turn the paddles "on" it gives a brighter sound and the paddles "off" give a muted sound but turning the pots doesn't affect the sound.  When I plug Atari paddles into port 2 though it works.  
Nov 30, 2009. 9:04 AMMicroscope says:
When you say you're soldering to pins 5, 7 & 9, it looks like (according to the markings on the board) that you're actually soldering to pins 1, 6 & 8.  Should I follow the drawing you have or the markings on the board?  Thanks.
Oct 22, 2009. 9:01 AMMicroscope says:
Audio or linear taper pots?
Jul 26, 2009. 11:34 AMLazyazz430 says:
Just some constructive criticism. C=B (Tilt your head) maybe change the name ;)

Aug 9, 2009. 3:12 PMLlamarama says:
You can't beat a bit of immature toilet humour! Made me smile! :D
Aug 1, 2009. 3:09 PMdepotdevoid says:
Hey, awesome instructable, you get my vote! Can you post a video or an mp3?
Jul 30, 2009. 8:31 AMNick Carnally says:
Dammnit Jaybles, now I have to buy a soldering gun, head to zerns / any flea market, and start scouring them for robo-Frankenstein parts. Very cool, and looks like a lot of fun.
Jul 25, 2009. 1:01 PMlemonie says:
8-bit! Can you post an audio file? L
Jul 27, 2009. 4:30 PMrobotguy4 says:
I 2nd this. Music suggestion: Do the Tetris theme song over and over again until you pass out! (or not...)
Jul 25, 2009. 4:54 AMstephenniall says:
Omg i love this i want one ! lol
Jul 24, 2009. 6:23 PMnight says:
Amazin work my man, put up a video of the rocking out,
Jul 24, 2009. 2:46 PMbrunoip says:
amazing :O

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Author:agent036(Making Noise)
Hi, my name is Jason, and I'm am artist. That doesn't mean I get payed to do art, though I have, I just am. The medium isn't important, the mind set is. I love to learn new things and attempt to expre...
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