[sdiy] My friend the CD4069...

[studio271]

This little IC has been very good to me lately, cause I have found 
many uses for it in sound. I can make a square, triangle, 
sawtooth, or ramp LFO with only 3 inverters each and recently, 
while messing around with it, I made a strange little circuit I'm 
not too sure what to do with yet. I was wondering if someone could 
help me find a use for it?

It goes a little like a monostable vibrator (one which takes and 
indefinite length pulse and outputs a pulse of definite length, 
but in my circuit's case, it accepts a pulse for as long as is 
needed and after the pulse stops, it continues to send the pulse 
out for a variable amount of time (set with a resistor or pot). 
The crude ascii schem is as follows...

                    /--------||-----\
                    |        C      |
        |\          |  |\      |\   |
     0--| >o--/\/\-----| >o----| >o---0
    +V  |/     R    |  |/      |/  Pulse Out
                    0
                Pulse In

Pulse Out sould be sent thru op-amp at +, with - connected to the 
Out to get a larger current...

 I just wanted to know if anyone knew a use for it, as all I can 
see is some kind of gate signal extender, or maybe if you 
attenuated the Out there would be some kind of thing where when 
the gate stops after you let go of the key it send a variable 
voltage out back into the VCO to produce a different freq. Or 
maybe the fact that I've never actually used an analog modular is 
preventing me from seeing a good use for it?  Maybe even those two 
I just mentioned are useful? Just hope you can see that ascii 
schem cause I have nowhere to post a pic for it, but i guess i 
described it enough as it is...

-Drew 

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