DIY Stompboxes > Building your own stompbox

typical phaser lfo waveforms?

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daverdave:
Cheers for the replies, sounds interesting. I was using an opamp astable for the squarewave and then an intergrator to obtain a triangle wave from it, would it be possible to get a hyper triangle from this setup? I have both opamps biased at around 4.5v and the output of the squarewave through a voltage divider to get 2v pk-pk.

Mark Hammer:
Check out this old article.  http://hammer.ampage.org/files/hypertriangleclock.gif

daverdave:
that's great, I'll have a try with that when I get back to uni.

daverdave:
Just out of interest, what should the output waveforms be biased at? Since they're roughly 2V pk-pk are they best being near 1V so that they swing bewteen 0 and 2V? I was going to use optocoupler to drive the stages.

MoltenVoltage:
Whatever you do, consider using rail to rail op amps to get the full sweep range.  You will be surprised how much better it sounds.

We have a schematic posted for doing that with our MV-53 tap LFO chip on the Phase 90, but you can modify any LFO in a similar manner.

http://www.moltenvoltage.com/mv-53.html

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