"Variableblender" - AD633 Trem and Ring Mod?

Started by Arn C., August 23, 2006, 11:06:53 AM

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Arn C.

Variableblender,
   Any more news on your AD633 Trem and Ring Mod project?  Any more modifications to the existing circuit you designed?

Peace!
Arn C.

goodrevdoc

I was actually wondering about that too, as i just ordered some sample ad633's. was gonna start messing with this, but i'm moving in a week.  :'(

varialbender

Heh, i feel special.
I havn't done too much, but now school is done, and I can focus more on this.
I've been doing a bit of research on what to use for the oscillator.
It looks like I need an opamp with low current consumption.
Gez has recommended the 7621 in a few threads, and I want to try it.
I heard CMOS isn't the best for an oscillator concerned with waveshape, so I'll check it out and see if that's the case.
Otherwise, any advice on good opamps for oscillators?
I'm also going to try to add an OTA waveshaper.
It might be odd to have two ways to get a square on one pedal, but I'm hoping it'll be cool-weird.
Oh yes, and I added the tilt pot and diodes, and it worked okay, but not perfect.
But then again, I found out that I can get perfect ramp/saw without the tilt pot.
I think I'll keep the tilt for asymetry though.
I'll keep you updated.
Thanks for the concern :)

varialbender

Oh yeah, added a resistor to the square out, cause it was much bigger than the tri.
And to get ramp, you blend half tri half square, which, in this case, makes it look like the ramp-up is pushed up and the ramp down is pushed down, which sounds exactly like ramp, though every second ramp is inverted.
/| /|
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Hope that picture made sense, it's a bipolar wave.
I'll have to add a switchable inverter on the square wave, so you can switch between ramp up and ramp down.
Make sense?