[sdiy] "voltage control" on the 556

[Bob Weigel]

I'm trying to recall one of my early lab exploits with an Apple IIe.  We 
decided to use it for some crude data intake when they were the hot 
thing in the early early 80's.  It had a 556 too it seems.  Been so long 
though.  It was generating a 'window' though that would 'AND' with a 
pulse string and a counter would count the number of pulses.  And it was 
calibrated so that the max pulses would be 255 as I recall. -Bob

Scott Gravenhorst wrote:

>Horton <horton.andrew at gmail.com> wrote:
>  
>
>>I'm building an atari punk console -
>>http://compiler.kaustic.net/machines/apc.html - and while I'm at it, I
>>was wondering what other sorts of modifications I can add to it. Since
>>I'm planning on making a bunch of little CMOS noisemakers and effects,
>>I was wondering if there's any way to take advantage of the "control
>>voltage" pins on the 556. My only knowledge of CV is typical 0-5V
>>stuff on modular synths but I was wondering if those two pins are in
>>any way similar to voltage control as I know it. My only real goal is
>>extra freakout/chaos on this circuit, so I'm certainly not looking for
>>something like 1v/octave control or anything like that, but I was
>>imagining being able to patch in the output of something else that I
>>build later.
>>
>>Am I totally barking up the wrong tree with this one, or what?
>>
>>    
>>
>
>hmm...  try it?
>
>
>
>-- ScottG
>________________________________________________________________________
>-- Scott Gravenhorst
>-- FPGA MIDI Synthesizer Information: home1.gte.net/res0658s/FPGA_synth/
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>-- When the going gets tough, the tough use the command line.
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