Schem for sine input to square or triangle output?

[D Wagner]

Hey Pedalheads,

I saw a schematic a while ago that converted a sine wave input to either a square or triangle output.  It used a lot of opamps, but looked do-able.  I thought that I had saved or printed it, but I can't find it now that I need it.

Does anyone here remember where I may have seen this, or know of a link to it (or something similar)?  Maybe a synth site?

Thanks!

Derek

[Paul Perry (Frostwave)]

It is easy to make a sine to a square, all you need is a comparator, or maybe a schmitt trigger (to avoid glitches if there is some noise on the sine).
But the triangle is harder, if you are looking for a circuit that gives a constant amplitude, no matter what the frequency. A square thru an integrator gives a triangle, but the amplitude varies with frequency.
Whihc is why, in synths, peole start with a triangle & go from there (easy to make a tri to a sine by overdriving a CA3080 or by a diode network).

[Marcos - Munky]

In Tim Escobedo's site you will find the Digital Octaver Fuzz, that I think gives a square output. And there is the Square Wave Made Shaper (or something similat ) that can change the shaper of the wave.

[D Wagner]

Hey guys, thanks for the replies.   I found the schematic I was thinking of.....but it was for converting a triangle to a square wave.  

I think that I'll do some surfing on the synth sites and see what I can come up with.  I was looking for something to alter the guitar's signal BEFORE going into a synth.  To kind of enhance the effect.

Derek

[smoguzbenjamin]

If you amplify & clip a sine wave you could get an approximation of a sqaure wave...

[Paul Perry (Frostwave)]

I was looking for something to alter the guitar's signal BEFORE going into a synth.  To kind of enhance the effect.

Derek

Maybe the Ken Stone 'wavemultiplier' is what you want!
here's a bunch of links to good synth-diy sites, including Ken's.
A bonus: he sells PCBs for it (but, check the voltages it wants first..)
http://mypeoplepc.com/members/scottnoanh/slsdiy/id5.html