Introducing the DiSH: A Digitally-Controlled Sample/Hold

Stompboxes circuits published in magazines, books or on DIY electronics websites.
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Ripthorn
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Post by Ripthorn »

I have always had an odd fascination with sample/hold effects. I thought about building one, but there are a lot of stories of the difficulties around the Maestro FSH-1 DIY builds. I saw the Subdecay Proteus and thought that was cool, but I wasn't going to drop that much on a pedal I may not use too much. Fast forward to a little over a year ago when I mangled my hand in a weightlifting accident and I couldn't play or be in the woodshop, I decided to dive into microcontrollers. I realized quickly that using a microcontroller in the control-voltage portion of the FSH-1 would do basically everything the Proteus does. I decided to change a couple things, such as no envelope-controlled filter (I wouldn't use it) and the addition of a pattern setting where I could set the pattern in the code to be whatever I wanted for interesting rhythmic effects. After a few board spins to fix dumb stuff, I proudly present the DiSH (Digital Sample/Hold).

I have more details, build documentation, schematics, code, etc. located here: https://scientificguitarist.wixsite.com/home/the-dish, free for anyone to use or play around with. This is not for commercial use, though. Have fun!

Video Demo:

[youtube]https://youtu.be/4KU7IE888go[/youtube]

EDIT: Anyone know why the video won't embed?
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soulsonic
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Post by soulsonic »

Cool.
I'm interested in trying your random signals thing in other circuits.
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran

Ripthorn
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Post by Ripthorn »

soulsonic wrote:Cool.
I'm interested in trying your random signals thing in other circuits.
By all means. The ATTiny and the arduino code would work to produce a control voltage for anything you want and allow tap tempo and manual speed control. I have only scratched the surface on what can be done with control voltage signals in other circuits. If you do, keep us posted, as I would love to see what you come up with!
Exact Science is Not an Exact Science - Nikola Tesla in The Prestige
https://scientificguitarist.wixsite.com/home

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