[sdiy] Uses for ILC8038

[Bob Weigel]

sure, it's a vco :-).  LFO's but also hey make a program that will 
monitor the output frequency, sampling only when all mod sources are 
null.  Establish a 'drift register' for each vco.  Ie. feed a dac output 
through a 4051 for each and update them with voltages designed to 
gradually bring the tuning back toward center.  By say just implementing 
a simple RC circuit at that point to put a time contstant in there that 
will make responses to the changes happen over a period of 10 seconds or 
so.  If I ever get time...be a fun project. One pic chip could manage 
that affair I'd think nicely coupled with zero cross detect for each 
vco's output so that these can just be fed to inputs on the pic and 
frequencies can be assessed via the code comparing to the note buffer 
for that note and a global null line when any of the vco's have an 
offset from a pitch wheel or envelope or whatever.

Sound good?  Has anyone done anything quite like this already?  Probably :)

Bryce Lanham wrote:

>Hey SynthDIYers,
>
>I have an ICL 8038 function generator IC that someone gave me, and
>could also get a few more from the same source. Are there any good
>uses for this chip?
>
>Bryce
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