[sdiy] Grant's Tracking Generator Calibration

[Gergo.Palatinszky at nokia.com]

Hi,

My version of Grant's Traching Generator / Voltage Twister is ready.
http://pala.web.elte.hu/TrackGen.jpg
http://pala.web.elte.hu/TrackGen2.jpg

Now I have some open issue about calibration and I would like to ask
your help...

The source is here:
http://www.musicsynthesizer.com/DIY/Grant/CVtwister.html

That's clear that 50k trimmer for setting the right saw frequency of
555.
1 MOhm trimmer before the "interpolate" pot. Can effect to the amount of
the "interpolate"-effect
The 5k trimmer to LM3914 can shift the voltage range where LEDs are
operating.
And there are an other 1M trimmer before the final output buffer.

I play with it a lot and set up many settings where the result was nice
but is there "a way" how to calibrate / set-up this module?
(pot/switch(+-5V/0-10V) setting, input signal, etc...)

Thanx a lot.

Br,
	Pala