Looking for

[FlyingZ]

I'm looking for an existing design that's much like a tremolo but with no slope. I would like it to switch the signal on and off very fast like a machine gun via momentary switch with perhaps a very slight boost. An auto kill switch perhaps.

[Ripthorn]

Sounds kind of like a burst box... 

On a serious note, I am not aware of one of those designs, but doesn't mean it isn't out there.

[Taylor]

It kind of depends how hard you need it to cut. There are plenty of square wave tremolos out there (Tremulus Lune is a popular one) but they usually either tick or the "cut" is not perfectly abrupt. Trem Lune is pretty good, though.

[appliancide]

The Gristleizer will do that. It does a lot more, but you might be able to just build the part of the circuit that you want.

[jacobyjd]

Gristleizer FTW! I'm almost finished w/ mine. It's got a GREAT square wave trem, plus much, much more, and it's not too painful a circuit

[FlyingZ]

Thanks, I'll look at them.

[connie_c]

the repeat percussion?

http://www.youtube.com/watch?v=01rs8_a-ylU

http://www.diystompboxes.com/smfforum/index.php?topic=75372.0

[slacker]

Just build any trem that can do a square wave like the Colorsound trem, EH Pulsar or the Tremulous Lune and use a momentary switch as the bypass switch. Might be worth having a look at R.Gs variable stuttering pedal as well http://www.geofex.com/FX_images/stutter.pdf

[FlyingZ]

I really like this but no info on it http://www.youtube.com/watch?v=cgXO9aBim1I

The Geofex Stutter will hit the breadboard within a week.

[JKowalski]

the repeat percussion?

http://www.youtube.com/watch?v=01rs8_a-ylU

http://www.diystompboxes.com/smfforum/index.php?topic=75372.0

The repeat percussion is more of a multiple-pick-strike-replicator. It's not on/off, but rather emulates the envelope of a pick attack and uses that signal, repeated, to tremolo the sound. It makes notes that ring out instead sound like you hitting the string a bunch of times.