enthalpystudios

wow, thanks for the responses! Going to have look up that LM13700, as searching the other day for ota transistors didnt lead me to anything. After I posted, I also found some info on vactrol's, but sometimes the low range of its resistance may be too high for my application.... Motorized pots are cool and all, but probably a bit pricey for me... I'm thinking of using a vactrol or other led/ldr type of unit (or transistor based) and using endless rotary encoders with led rings.... does this sound plausible? And relays to replace switches of course. and one more... if all of these things were voltage controlled by the pic, I can save my settings couldnt I? And if so, how many states could I save (would I need extra memory somehow?) also, what voltage is available from an AOUT? Is standard CV 0/+5 or -5/+5 or what? I have a feeling that I'll have to use vactrols or led/ldr combo's that match up with the available cv from the AOUT. Thanks for the help guys! billy

I've been lurking around here and at ucapps and I'm really blown away. some really cool stuff going on here! I have been wanting to build an all analogue multi-fx guitar pedal for a while, and I have most of what I need together for it... I've been thinking about controlling it with MIDIbox, and feel that If my good friend (hopefully he has some time) programmed the pic for me, I could put together my pedal board with midi control. I know that I can keep a digital rail going that can perform switching with relays, and I know that led's and lcd's should be an issue... also, using pots into analogue in's for the controls should be fine as well, but what I can't figure out is how I could get a CV signal from an AOUT board into a resistance value to take the place of the pot normally in the circuit. Can this be done? I'd like to try and do things with rotary encoders and led rings to display travel, and illuminated momentary switches for switching. And has any one else used midibox apps to control analogue equipment besides synths with CV input? Thanks for having this great forum, and thanks TK for these great projects! billy