Simple stutter/automated killswitch pedal

Mind Flayer · February 25, 2015, 04:10:13 PM

I am interested in building a very simple stutter pedal that would basically sound like an automated kill switch. Aside from the footswitch to turn the effect on and off, the only control would be one knob to control the speed of the effect. Anybody have any ideas on how this would be done? Thanks

nocentelli · February 25, 2015, 04:28:43 PM

Like a choppy tremolo?

Brisance · February 25, 2015, 04:59:01 PM

Maybe a MOSFET in a voltage divider configuration with a 555 output going to the gate?

GGBB · February 25, 2015, 05:01:27 PM

Quote from: nocentelli on February 25, 2015, 04:28:43 PM
Like a choppy tremolo?

+1

Any tremolo that can do decent square wave and goes both slow enough and fast enough as well as deep enough for your purposes.

Gus · February 25, 2015, 05:08:23 PM

Have you looked at GEOFEX?

GGBB · February 25, 2015, 05:21:09 PM

Quote from: Brisance on February 25, 2015, 04:59:01 PM
Maybe a MOSFET in a voltage divider configuration with a 555 output going to the gate?

The Tiny Tremolo uses a 555 to drive an LED/LDR - very square and a simple circuit:

http://www.diystompboxes.com/smfforum/index.php?topic=87322.msg840206#msg840206

FUZZZZzzzz · February 27, 2015, 05:07:50 AM

There was a discussion here about the utter stutter pedal. Maybe breadboard this?
http://ilovefuzz.com/viewtopic.php?f=151&t=32044&sid=691cfbdf5865ed0c9bda909e801704ad&start=15

bad drawing I know, but it should give you some ideas.

smallbearelec · February 27, 2015, 07:05:39 AM

+1 re a square-wave trem. My Tremulous Bear will do this:

http://diy.smallbearelec.com/Projects/TremBear/TremBear.html

You might also want to experiment with a Repeat Percussion Device like either the Moosapotamus Skippy:

http://www.moosapotamus.net/ideas/skippy-tremolo/

or this idea I came up with:

http://diy.smallbearelec.com/Projects/RepeatPerc.gif

Time to pull out the breadboard and find what makes you happy.

GGBB · February 27, 2015, 02:31:35 PM

Quote from: smallbearelec on February 27, 2015, 07:05:39 AM
http://diy.smallbearelec.com/Projects/RepeatPerc.gif

Cool! What is the value of the top resistor in the LFO?

smallbearelec · February 27, 2015, 10:34:51 PM

Quote from: GGBB on February 27, 2015, 02:31:35 PM
Quote from: smallbearelec on February 27, 2015, 07:05:39 AM
http://diy.smallbearelec.com/Projects/RepeatPerc.gif
Cool! What is the value of the top resistor in the LFO?

I can't believe that I forgot to write it down when I was trying it out. However, you will be breadboarding this anyway, so experiment to find a value that gives the upper speed limit that you want.

danielzink · February 28, 2015, 12:35:31 AM

Nobody ?

Really ?

Burst Box !!!!

snarblinge · February 28, 2015, 05:48:55 AM

Thanks danielzink, I clicked in just to see if this had gone that way.

Jack White III

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Simple stutter/automated killswitch pedal