[sdiy] 4069 CMOS LFO

[Magnus Danielson]

From: Scott Gravenhorst <music.maker at gte.net>
Subject: [sdiy] 4069 CMOS LFO
Date: Sun, 04 Nov 2001 14:09:29

Hi Scott,

> http://home1.GTE.NET/res0658s/electronics/4069_LFO.gif
> 
> More CMOS fun.  3 gates, Triangle LFO, 6 volt peak 
> to peak output from an 8 volt supply.  As is, it 
> goes down only to 0.25 Hz.  Much more than a 1 meg 
> charging resistor, and it stops, so I think the only 
> way to get lower frequency is to increase the cap.  
> The one in the drawing is 1.33 uF.  The waveform 
> looks quite undistorted to me, though it's hard to 
> tell for certain.

Hehehe... I put him onto it! ;O)
(He was on the track allready but...)

Many thanks!

I think many of the circuits needed to do a 4069 only synth is almost
all there.

Cheers,
Magnus