[sdiy] top octave gneration

[Scott Gravenhorst]

I had an organ PC board that was built this way.  12 trimmers
to tune the 12 discrete sawtooth oscillators.  The dividers 
were on-board as well.  I wish I still had it, but it was the
victim of something heavy falling on it while powered on one
day.  I would consider the ICM7555, typical current is 
spec'd at 180 uA for a 16 volt supply, whereas the bipolar
part draws 10 mA for a 15 volt supply.  These specs are for
the single timer parts, but I know you can get the CMOS part
in at least a dual maybe even quad.


adam at hoodmusic.net wrote:
>hi
>    i have been thinking about building an organ or string synth for
>awhile now and i was thinking of useing a few quad 555 timers to create
>the top octave and then divide it down for the rest of the notes. would
>there be any problems in going about it in this method? or would there
>be a better way to go about?
>
>adam
>

=========================================================  
- 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