first layout attempt: Guitar Synth

[choklitlove]

Hey choklit, 

200dpi dosen't give U a "size" of the picture.

Just print the layout reduced/enlarged until the ICs line up on their tenthinch  (.1) centers.

afn
stayDIYing
T

i realize that.  i just put that because that gets you close.  i also put the actual dimensions of the board so people can scale it themselves.  i will eventually put the board in a pdf that's scaled.

[marmora]

Has anyone verified this layout yet?
I'm curious about building this for my brother for Christmas, so I thought I'd get a head start now.

[$uperpuma]

yeah , while we are on a roll of verifying your layouts

[choklitlove]

Has anyone verified this layout yet?
I'm curious about building this for my brother for Christmas, so I thought I'd get a head start now.

i will be working on this in the next couple of days, and i'll post here with results.  thanks for the interest!

keep an eye on this page: http://geocities.com/worthekik/guitarsynth.html

[choklitlove]

alrighty...

i have built it.  there are some things that maybe someone can explain so we can make this layout work nicely for everyone.

using this layout:
http://geocities.com/worthekik/guitarsynth.html

initially, there was no output.  however, i found out, and i don't remember how, that if i put a 100K resistor between lug 3 of of both the VCO pot and the level pot this happens: there is a nice output, but neither pot does much of anything when turned (i realize that it is taking the signal straight to the output).  however, the Frequency pot sounds awesome and does a great deal when turned.  this excited me and made me think that this layout isn't dead yet.  i will continue to experiment, but maybe someone can help me out quicker with some answers or suggestions.  thanks to everyone!

[choklitlove]

nothin?

[nag hammadi]

i'm watchin too.  i want to make this one for some noisy buddies of mine.

i wish you luck.  maybe this bump will help...

has anyone built this??

[choklitlove]

has anyone built this??

i have.  it's just got a few problems (a couple posts up).  when i use the resistor thing, it has a really cool sound.  i just want to know why it does what it does when i do what i do.

i wrote a rap

[nag hammadi]

awwww snap!

hippity hop and whatnot.

[Meanderthal]

 I've had my eye on this circuit for a while now... I was skeptical that it would work at all... seems too easy... I'm glad you got it up and running, even if it's not as expected! Does it track ok, is it musical, or is it more like a ring modulator- all dissonant and wierd?

[nag hammadi]

i am dissonant and weird

[Meanderthal]

 Yeah, wierd = good(usually), but a pitch-to-voltage synth is priceless, especially if it actually works! Then you can get wierd in a very musically useful kind of way... especially if you can use an adaptation of this circuit to possibly output CV to an analog synth or 2...hehe

[choklitlove]

i don't have the project handy, and if i try to remember what it was like, i'll get it confused with the other project i made last night.  sorry.  i'll post after i play with it again.

if you're interested in the guitar synth, you might like the pulse wave here: http://geocities.com/worthekik/pulsewave.html
it's really easy and it sounds cool.

[Meanderthal]

 Hey, nice layout of the PWM! That's another one I've had my eye on... Actually I'm after bass synth, but I learned long ago that usually the difference is usually a cap or 2, maybe not even that... provided it can even track low frequencies of course...

[choklitlove]

alrighty...

i have built it.  there are some things that maybe someone can explain so we can make this layout work nicely for everyone.

using this layout:
http://geocities.com/worthekik/guitarsynth.html

initially, there was no output.  however, i found out, and i don't remember how, that if i put a 100K resistor between lug 3 of of both the VCO pot and the level pot this happens: there is a nice output, but neither pot does much of anything when turned (i realize that it is taking the signal straight to the output).  however, the Frequency pot sounds awesome and does a great deal when turned.  this excited me and made me think that this layout isn't dead yet.  i will continue to experiment, but maybe someone can help me out quicker with some answers or suggestions.  thanks to everyone!

still no ideas?

[gez]

What exactly are you after?  It sounds as though you've got it working.

If you redraw the schematic (showing this resistor between the lugs etc) it would be easy to make suggestions for improvement (I find layouts hard to follow) if that's what you're after.

[1878]

Thought I'd bump this to see if any ground has been made. Just looked through my box of stuff and i've got all of the required parts... wondering if I should start ??

Thanks everyone

[Quackzed]

When you mentioned how it behaves better above the fifth fret, it made me think of octave up circuits. I wonder if a smallish(.05) cap to ground at the input (to approximate neck pickup/tone rolled down) would aid in the tracking. I recall tracking pedals that got confused by too much high frequency content, or perhaps some diodes to ground clipping to square up the signal your feeding the chip.?
these are just ideas to try,  sometimes you just have to try some random things and something will 'work' and then go back and try to figure out how or why.