[sdiy] MIDI VOL PEDAL with no micro??

[Dan Snazelle]

thanks for the practical advice!!


ive made midi things with an avr before and other than trying to get my friend comfortable with learning some code ( or pasting some) i think its the easiest way to go


just what exactly would you do with shift registers, and a ADC... in other words, the CC message, if you wanted to make a CC #1 pedal...would it just be the same conversion to 1's and 0's over and over??


i wonder ( from the bending angle) if you could get any good results from sending sporadic bursts of  8 bit digital information via an opto to a synth?


thnx

Sent from my iPhone

> On Feb 8, 2014, at 2:30 PM, "Scott Gravenhorst" <music.maker at gte.net> wrote:
> 
> 
> Dan Snazelle <subjectivity at hotmail.com> wrote:
>> is it possible to create a MIDI volume pedal with nothing but an 
>> optocoupler, opamps, cmos and passives? 
>> 
>> 
>> i ask because i have a friend who wants to make one himself
>> 
>> id just use an AVR with an opto and a pot based pedal.... but i 
>> thought it might be fun to go the other route 
>> 
>> 
>> are CC messages complex? i wouldnt dare try this with SYSEX but i 
>> thought a CC pedal might be within the realm of possibility! 
>> 
>> 
>> thanks
> 
> I'd use the AVR or a PIC.  But yes, with enough CMOS parts you could
> make a state machine that could handle it.  However, you'll need to add
> a UART and bit clock (unless you want to build that out of CMOS too). 
> In my view, the complexity is enough to warrant a uProc.  Think of all
> the things the uProc would have to do - all of that would have to be
> represented in CMOS logic.
> 
> 
> 
> -- ScottG
> ________________________________________________________________________
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