Anderton CMOS LFO mod?

[JisforJustin]

So the Anderton Tremolo uses 3 stages of the 4049 for a LFO with both square wave and triangle wave outputs. If you just want the square wave output do you still need all 3 stages or are the last 2 stages changing the signal to a triangle wave? Here are some links to shematics. The 2nd one is a little easier to read imo:

http://experimentalistsanonymous.com/diy/Schematics/Tremolos%20and%20Panners/Anderton%20Tremolo.gif

http://experimentalistsanonymous.com/diy/Schematics/Tremolos%20and%20Panners/Dean%20Hazelwater%20Anderton%20Panner.gif

By the way there are a ton of really good schematics on http://experimentalistsanonymous.com, in case anyone hasn't already seen it.

[earthtonesaudio]

I'd not seen that one before, thanks!

Yes, experimentalists anonymous is a great site.   

[Mark Hammer]

near as I can tell, you need all 3 invertors.  same way that you can "tap" a square or triangle wave from a standard 2-opamp LFO, but you still need both op-amps even if you only want the one waveform.

[JisforJustin]

near as I can tell, you need all 3 invertors.  same way that you can "tap" a square or triangle wave from a standard 2-opamp LFO, but you still need both op-amps even if you only want the one waveform.

Thanks Mark, that makes sense to me.

[earthtonesaudio]

Mark is right.  Can't have a free-running oscillator without a capacitor in there somewhere for charge storage.

If all you need is a square wave, check out this circuit:
http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/square.html#c1
But using a hex inverter is useful too because you can invert and do lots of other fun stuff...

[JisforJustin]

Mark is right.  Can't have a free-running oscillator without a capacitor in there somewhere for charge storage.

If all you need is a square wave, check out this circuit:
http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/square.html#c1
But using a hex inverter is useful too because you can invert and do lots of other fun stuff...

Cool, nice circuit, thanks!