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DIY Stompboxes => Building your own stompbox => Topic started by: nikStomp on April 04, 2008, 03:46:56 PM

Title: Tremolous Lune with oscillator auto start
Post by: nikStomp on April 04, 2008, 03:46:56 PM
Hello
I have build the tremolous lune
and is a very good pedal
but I want a feature... I want that the oscillator reset on very strong notes...
I have made some try and I have noted that shorting the 10uf cap in the oscillator section
actually reset the oscillator and I have thinked that with a simple fet I can do this.

The problem: I must sense the input from guitar, amplify, square, and send an impulse to this fet
when the input is strong enough....
Anyone have tried this??
Schematic?
I've read the ggg article on auto wah but I don't know how large is guitar signal, what frequencies have,
if I can filter a frequency that is tipical of guitar, and definitely how to project this

Help!!!

i think that it can be incorporated in any sort of effects, f. ex. phaser (in my phase 90!!)

thanks

Nicola
alias nickStomp
   
Title: Re: Tremolous Lune with oscillator auto start
Post by: dschwartz on April 04, 2008, 04:33:11 PM
what happens when you reset the oscilator? what is the effect?
Title: Re: Tremolous Lune with oscillator auto start
Post by: frank_p on April 04, 2008, 04:49:30 PM
Perhaps you could apply the same thing as in auto wahs.
Look at Mark Hammer papers:
http://www.geofex.com/Article_Folders/ECFtech/ecftech.htm
Title: Re: Tremolous Lune with oscillator auto start
Post by: R.G. on April 04, 2008, 05:40:36 PM
Or you could look at the article on GEO with the automatic start up of the LFO for the EA Tremolo.
Title: Re: Tremolous Lune with oscillator auto start
Post by: johngreene on April 04, 2008, 06:57:37 PM
Quote from: R.G. on April 04, 2008, 05:40:36 PM
Or you could look at the article on GEO with the automatic start up of the LFO for the EA Tremolo.
What? No link? you are going to make us search for it ourselves??!!!
(http://darkrazor.com/images/cart/teacher_preview.jpg)

:icon_lol:
Title: Re: Tremolous Lune with oscillator auto start
Post by: johngreene on April 04, 2008, 07:12:53 PM
Quote from: R.G. on April 04, 2008, 05:40:36 PM
Or you could look at the article on GEO with the automatic start up of the LFO for the EA Tremolo.
kidding aside, I tried to find the article you mention and came up empty! A search for EA Tremolo comes up with 0 results?

--john
Title: Re: Tremolous Lune with oscillator auto start
Post by: frank_p on April 04, 2008, 07:15:17 PM
Vibra-matic - Spiff up your EAN Tremolo
Title: Re: Tremolous Lune with oscillator auto start
Post by: GREEN FUZ on April 04, 2008, 07:22:03 PM
Here you go.

http://www.geofex.com/FX_images/vibmatic.pdf (http://www.geofex.com/FX_images/vibmatic.pdf)

Now take that look off your face.
Title: Re: Tremolous Lune with oscillator auto start
Post by: frank_p on April 04, 2008, 07:22:41 PM
Or should I say, thank you Mr. R.G. for not letting our mind set in lazyness.  :D
Title: Re: Tremolous Lune with oscillator auto start
Post by: frank_p on April 04, 2008, 07:27:18 PM
Now let your imagination flow freely.

(http://silviahartmann.com/images/fun-with-art/bob-ross-tv.jpg)
Title: Re: Tremolous Lune with oscillator auto start
Post by: nikStomp on April 06, 2008, 07:20:34 PM
The vibra-matic schematic is good!!

I try it tomorrow night (when I can!!)

And post the result

and what you think about this ????

http://www.tomwiltshire.co.uk/sdiy/lfo.html (http://www.tomwiltshire.co.uk/sdiy/lfo.html)
It have a sync input....
maybe I can program a tap-tempo function.... and have the definitive tremolo ever.....
like the guyatone optical tremolo http://guyatone.com/GstC04.php (http://guyatone.com/GstC04.php)
Title: Re: Tremolous Lune with oscillator auto start
Post by: RonaldB on April 07, 2008, 05:51:20 AM
Hi,
I looked at that PIC based LFO to. I want to make this also with tap tempo but i don't no where to start.
Can you do that  ???

regards Ronald