Vibrato build, more Hollow Earth stuff..

Here's a vibrato I built semi-recently. It's based on a PT2399 delay chip and I use an AVR micro with a few wavetables to generate LFO shapes.





An update on the Hollow Earth. As explained in a mass email, I'm moving to a waitlist scheme. So I've asked everyone on the notification list to email me again, and I will use that order. I've already been in contact with the four for the next batch (very soon). In the meantime, here's a video demo by user crxshdxmmy showing some examples of traditional trem and some pattern variations:

Hollow Earth (v2)

First prototype of v2 is done. Things to do include minor software tweaks, getting expression-out working, cosmetic changes. I figure I'll have a small batch of these available for around $200-225 US in july/august.

Hollow Earth v2 - populated PCB

Hollow Earth v2?

Alright.....

I posted the video sample and details of that Hollow Earth pedal I built a couple weeks ago on about 5 forums. It went slightly viral on a few others thanks to a few users. Anyways, interest in it has been a little overwhelming! So much so that I've convinced myself that I should build a batch of revisions of this to spread around.

Things I'd like to add/change:
-Eight to ten presets, all overwritable with your own shapes
(with LED digit display)
-Expression-in for the shaping
-Expression-out to "shape" other effects
-Rugged footswitch for record instead of the flimsy button
-Random mode
-Triggered envelope mode
-Sample input as waveshape
(the last one is a biiiig maybe)

After a 10-day break from this stuff to play jams/gigs, I started tinkering again. I got random mode mostly working, and I've started the preset saving bit. 8 pin DIP 24LC eeproms are a wonder!