The chopper - duty cycle tremolo

[devastator]

Hi guys,

Just wanna share a nice project I've just finished . it's a tremolo with duty cycle variation . The lfo isn't really mine it's a modified Ray Wilson's LFO . I changed few values to make it better for a tremolo project.

few words about it . I replaced the tradditional square wave by a kind of "soft square" made of an op-amp. It avoids ticking noise . I added a x2 gain stage at the end to allow a volume pot . (that way no complains about the volume drop) . this stage is not really necessary , the ota gives a good volume boost but I had a TL072 left and like to use all the parts.

I used standard values hence the 2 100K resistors in the oscillator but obviously you can replace it with a 200K. The same method was used for 5k (4K7+1K) in the waveshaper op-amp , before the depth pot.

the speed is low at min but you can increase the tail resistor to make it faster.

for those who don't know Ray Wilson I highly recomend you to go to his website, it isn't guitar related , it's synth DIY , but it's really interesting !

http://www.musicfromouterspace.com/inde ... 70&VPH=750

enjoy!