The modular Flunk synth is an Atari punk console with added flange capabilities. It produces a pulse wave using a LM556 Timer.
The flange can be used to process other signals such as guitar via the flange input.
It is powered by two 9v batteries. One powers the console, and the other powers the flange.

This is my entry to the art of sound contest.
Please Vote :)

(This is my first instructable)

The first audio sample is me playing it through a simple sequencer. The second is pure Flunk.
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Step 1: What you need.

1K (2x)
10uF (electronic)
Potentiometers -
500K lin (2x)
100K log
SPST Switch
1/4" Jack
LED (i used a flashing multicolored LED)
9v Battery clip

You will also need a flange pedal. I used a FAB flange pedal, they are only $15.

Step 3: The Voice

Picture of The Voice
I won't get too deep into this step, but it is the most crucial. Follow the schematics carefully. This will take the most time and patience. I don't have any breadboard, but if it is available for you, test all your connections before you solder it up.

Step 4: Add flange

Take apart the flange pedal using screwdriver and set aside plastic stomp box (it can be recycled).
Now desolder the led from the board and remove the LED. now add wire were the LED once was on the board.This is so it can be fixed to the enclosure we will be putting it in. I replaced this led with a RGB color changing one(shown below). Then used the Blue-violet one as the Osc On/Off indicator. . now do the same process with the on/off switch, but replace the switch with on of your choosing (i used a spst)
mcmahanly3 years ago
Can I use any 556 or must it be the LM556?
tomoliveri3 years ago
Any chance you can put the schematic online? geocities has closed..
oweng40003 years ago
Hey man,

I'm pretty sure that the 556 only has 14 pins. Correct me if i'm wrong.

pzh7775 years ago
The synth HAS to be hooked up to a guitar/piano or whatever right? or can it also just be played off an amp?
DjFluorescent (author)  pzh7775 years ago
it hooks up strait into amp/mixer or whatever.. :)  i suppose you COULD use the flanger as guitar effects, but  it is really just to shape the sound of the synth
acidblue5 years ago
Where do you attach the 3 grounds ?
DjFluorescent (author)  acidblue5 years ago
To each other completing the circuit .
I think I see what you're going for, but the instructable would be better if you provided your own pictures and maybe even a sound clip or video to show how it sounds. I'll be following this if you do
Actually, there are two sound files posted. and i don't have a videocamera. thank you for you input. This is my first instructable :)
I didn't even see the files haha