Hysteresis Oscillator w/ Vox 847

[oldrocker]

I recently built the Hysteresis O and it sounds wierd and crazy just like I wanted.  It's a very Nyquist sounding circuit.  There is some high pitch whine at certain settings.  I built a Vox 847 a while back and added that after the H.O.  Not using any foot control just a pot to adjust the frequency.  I'm able to dial out much of the noise and it gets a deep cool tone at some settings.  This gives the Hysteresis some different tone from high end crispness to muffled low end mush.   Very cool.  Just thought I'd share that with ya.

[oldrocker]

I took some pictures of my sloppy circuit boards for this project.  I still need to box it up and I'm using one of my wife tins.  Hopefully it looks alright when I'm done. 
http://www.logmonster.com/images/full/?pic=tyuu2_1176698639-422-14986.jpg
http://www.logmonster.com/images/full/?pic=tyui_1176718200-422-14985.jpg
http://www.logmonster.com/images/full/?pic=tyrr_1176716020-422-14984.jpg
http://www.logmonster.com/images/full/?pic=tyii_1176649660-422-14983.jpg

[choklitlove]

i'm really glad people are enjoying this circuit.  being the closest thing i've come to designing, it gives more faith in myself to design a circuit 100% by myself sometime.

sounds cool, oldrocker.  got any clips?

[oldrocker]

Hey choklitlove,
Nice job on the Hysteresis.  I really like that trem effect it has.  One thing cool about the Vox 847 on the end of it is when using the bridge pick up you can almost dial out the ticking while it's tremolo is active.  The same is true of the high pitch whine.  Of course this changes the overall tone (more muffled and bassy) but it becomes more usable this way.  Apparently the the wah effect works on the frequency noise range of the Hysteresis so you're able to tone it down some. 
I'll have to make some sound clips and show how you can dial out the noise with the pot on the wah.  Plus it expanse the sound capabilities of the Hysteresis.  Again great job on this.  For such a simple circuit you get tremolo, bit cruching sounds and lo fi effects with one easy build.

[oldrocker]

I boxed it up in a tin my wife gave to make a pedal out of.  The knob in the lower middle is the Vox 847 pot.  I know it's a funny looking pedal but so is how it sounds.
http://www.logmonster.com/images/full/?pic=Hysteresis1_1176745880-422-14990.jpg
http://www.logmonster.com/images/full/?pic=Hysteresis2_1176801145-422-14991.jpg
http://www.logmonster.com/images/full/?pic=Hysteresis3_1176734120-422-14992.jpg
http://www.logmonster.com/images/full/?pic=Hysteresis4_1176777895-422-14993.jpg

[bumblebee]

Thats pretty cool for an enclosure dude,sounds fun!

[danceatron]

I built 3 of these in 1 box and added switches to add capacitors parallel to the o.1 uf caps to take it into slow tremolo territory.
I'd like to put 5 or 6 of these in a box all running parallel.

[doug deeper]

i breadboarded this a while ago and found a .01uf to ground at the end of the circuit killed a lot of the bleed through, and not much in the way of "tone".

[choklitlove]

i tried that too, but found it was no different than turning down the tone of the guitar, so i disregarded it.