[sdiy] new project working!!!

[Michael Ruberto]

Ian,
>
>Interesting work, thanks for taking the time to post your results.

MY work interesting? nah! I get my ideas from what I learn from your work 
;-)

>
>Your project is somewhat related to a waveshaper idea I have been working 
>on.  My waveshaper will use an LM3914 also.  It will be driven by a 0-1 V 
>sawtooth (audio).  The voltage across the divider chain will be varied from 
>5 V to 1 V by a control voltage.   The odd-numbered outputs will be summed 
>to drive a comparitor.  This will yield a train of pulses, with a single 
>square wave when the CV is at 5 V, and with 5 pulses when the CV is at 1 V. 
>  I guess you could call it a pulse-number generator.  The lowest harmonic 
>in the spectrum will be 1, 2, 3, 4, or 5, depending on the CV.
>

Your idea is intriguing. It's a voltage controlled frequency multiplier. so 
if you used a triangle instead of saw would the result be 10 harmonics? of 
course the CV would turn them on/off in pairs then if that is the case.

>It seems you might be able to use a similar technique for your shaper,  
>controlling the voltage on the resistor chain rather than using the 
>divider/multiplier arrangement.

in fact this has occured to me. it might be the perfect solution as long as 
I prevent the CV range from putting the whole chain too far below the 
amplitude of the wave being processed.

>
>Let me know what you think!
>

I had an idea that was somewhat similar to your's recently. The idea was to 
have monostables connected to each output of the 3914 and to run the outputs 
of the monostables into a mixer where they can have an adjustable positive 
or negative offset. by adjusting the the time of each monostable separately 
and the offsets it would allow some complicated patterns to be produced.
enough of my strange ideas. I look forward to learning from another one of 
your designs, please keep me informed.

sincerely,

Mike
>
>
>
>At 06:16 PM 5/30/2003, Michael Ruberto wrote:
>>Ok I have completed a preliminary schematic of what's on the breadboard so 
>>far. This much of the circuit works good enough if you don't want to use 
>>it to process control voltages. It needs the multiplier though for an 
>>output that follows the input voltage level.
>>http://www.sunrisecomputersolutions.com/samples/decimator.html
>

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