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Italye
Joined: Jul 26, 2006 Posts: 2 Location: nowhere
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Posted: Wed Jul 26, 2006 2:52 pm Post subject:
not ANOTHER 555 synth...Help? |
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hwey guys, i'm trying to build a cool little hardware synth out of the 556 dual timer. have you seen anybody do something like this with a 555 equivalent? and so i drew out these schematics, modified from some site and i'm wondering if any of you know if this might work...or if i did something wrong, or could make it easier for myself. basically, you have a switch to choose the octave, with diff. resistors, and then when you hit a key, it adds resistance to the octave "base" resistance, so i'm pretty sure i actually dont need R1, since the octave and key area actually R1. but will that screw with something? i think the difference between R1 and R2 determines the pulse width or w/e, and it'd be nice to have a switch to control that. and i havent done all the math, so yeah...thyanks
it'll be like monomate, but hardware
edit: eep! wrong forum! i just saw that there is actually a DIY synth section...ummm feel free to move this there. |
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seraph
Editor
Joined: Jun 21, 2003 Posts: 12398 Location: Firenze, Italy
Audio files: 33
G2 patch files: 2
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Posted: Wed Jul 26, 2006 3:51 pm Post subject:
Re: not ANOTHER 555 synth...Help? |
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Italye wrote: |
edit: eep! wrong forum! i just saw that there is actually a DIY synth section...ummm feel free to move this there. |
done welcome to electro-music.com _________________ homepage - blog - forum - youtube
Quote: | Don't die with your music still in you - Wayne Dyer |
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dnny
Joined: Mar 12, 2005 Posts: 519 Location: Helsinki, Finland
Audio files: 8
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Posted: Fri Jul 28, 2006 12:46 am Post subject:
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i think the best way to develop things is by breadboarding them. so you can try if the R1 is necessary and you can tweak other component values . when you are pleased whit what you have, just solder everything up on a stripboard or veroboard
PS. have you tried Ray Wilson's Schematic Publisher _________________ Association of experimental electronics
www.koelse.org
flickr: cable porn group |
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Italye
Joined: Jul 26, 2006 Posts: 2 Location: nowhere
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Posted: Fri Jul 28, 2006 1:17 pm Post subject:
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yeah, i havent really ordered all the components yet so i was just fleshing out some ideas, so i'll probably buy a breadboard now, seeing as how they work, instead of alligator clipping everything together..and yeah, sorry about the ridiculously sloppy diagram.
thanks! |
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terminal.h0micide
Joined: Aug 01, 2006 Posts: 1 Location: LaPorte, IN
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Posted: Tue Aug 01, 2006 1:52 pm Post subject:
555 synth |
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the only prob i know with 555s is that each timer needs a seperate power source or isolate them somehow, otherwise they all run the same freq
im looking to build a drum synth out of 555s if i get a diagram ill share it with you |
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toppobrillo
Joined: Dec 10, 2005 Posts: 766 Location: oakland, ca
G2 patch files: 1
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Posted: Tue Aug 01, 2006 8:51 pm Post subject:
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oh hey you shgould use the 7555 dude it uses alotless current and is more tame than t'other |
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jksuperstar
Joined: Aug 20, 2004 Posts: 2503 Location: Denver
Audio files: 1
G2 patch files: 18
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Posted: Tue Aug 01, 2006 10:12 pm Post subject:
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Yes, the 7555 uses a CMOS process, not the old, which I believe was bipolar. As such, the newer CMOS style won't jacknife (nearly short) the power supply the way the 555 can when it switches.
That said, the normal old 555 might have a little unpredictable character to it ...partly due to it's bipolar nature? |
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