[sdiy] 4069 CMOS LFO -- Improved

[Scott Gravenhorst]

I've improved it.  The Schmitt trigger I had was
crap.  It will now go down to about 0.125 Hz and
has an ouput signal of 7 volts (plus change) P-P.

music.maker at gte.net wrote:
>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.
>
>=========================================================  
>- Government: The other religion.
>- The media's credibility should always be questioned.
>- Lambs who lie down with lions are lunch.
>
>-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
>-- Linux Rex         | RedWebMail by RedStarWare
>-- FatMan: home1.GTE.NET/res0658s/TekLab_FatMan_WebSite/index.html
>
>

=========================================================  
- Government: The other religion.
- The media's credibility should always be questioned.
- Lambs who lie down with lions are lunch.

-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
-- Linux Rex         | RedWebMail by RedStarWare
-- FatMan: home1.GTE.NET/res0658s/TekLab_FatMan_WebSite/index.html