DIYstompboxes.com

DIY Stompboxes => Building your own stompbox => Topic started by: black mariah on August 07, 2004, 11:34:38 AM

Title: Schmitt triggers
Post by: black mariah on August 07, 2004, 11:34:38 AM
What does a schmitt trigger sound like with a guitar running through it? Theoretically speaking, shouldn't it make the guitar sound like a square wave synth? Unless I'm not understanding it right... :?
Title: Schmitt triggers
Post by: Jason Stout on August 07, 2004, 12:15:01 PM
Yes it sounds "synthy" But you no longer have a natural decay, (Schmitt triggers have a set trigger level.) I spent a week or two on this two years ago. Tim E. has some stuff posted if I remember correctly.
Title: Schmitt triggers
Post by: black mariah on August 07, 2004, 12:34:02 PM
Ooh, sounds cool. The lack of decay makes sense. I've been looking for something to do with this random 555 timer I have, and got an idea whn I read about schmitt triggers. Gotta go do more research. Stuff to follow, hopefully.
Title: Schmitt triggers
Post by: Jason Stout on August 07, 2004, 12:59:11 PM
Schmitt triggers, multivibrators, sounds like fun! :twisted:
Title: Schmitt triggers
Post by: Peter Snowberg on August 07, 2004, 01:02:00 PM
If you apply variable amounts of feedback from the inverter (comparitor) output back to the input, you can vary the level of "Schmittness", a.k.a. hysteresis. ;)

To get some decay back, you can always mix some dry signal back in.
Title: Schmitt triggers
Post by: Jason Stout on August 07, 2004, 01:20:15 PM
QuoteSchmittness

That sounds better than hysteresisisess!
Title: Schmitt triggers
Post by: Athin on August 07, 2004, 04:55:59 PM
remember that the schmitty Schmitt trigger will react only to the positive part of the signal, so you'd need two, yup a Schmitt push-pull-er, only the negativer part of the signal would have to be inverted so that the trigger could do it's job and then inverted again (voltage-wize, not talking about an inverter!)