Here are some photos of my latest box. I made it using a pcb that I painted with black spray paint. The box is a wooden cigar box painted with hammered metal spray paint. There are 6 piezo discs mounted to the bottom of the box under the pcb so you can listen to them or you can use the fixed resister mixer and listen over an amp using the output jack.
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I already liked the look of your pervious two but this one looks even cleaner. And I agree on the video, sound and blinkin lights! _________________ There he goes. One of God's own prototypes. A high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die.
Hunter S. Thompson movies noise
Here is a quick video demonstration of the XOR 4070 noise chain. The audio is a bit low so you might want to use headphones (first time I shot a video with this camera... the volume kicks in around the 1 minute mark).
Anyhow, here is my brief description:
Noise circuit made using a CMOS 4070 XOR gate IC. There are 2 inputs to the circuit and 10 outputs with red LEDs. The inputs are driven by 2 squarewave oscillators (made using a 40106 IC). 6 of the outputs are sent to a passive resistor mixer and then to a small amp.
There is no amp in this video, just 2 piezo discs, so use headphones.
2 LFOs made with a 4069 CMOS IC. One is driving a photocell which is connected to a 40106 oscillator. This is then gated using a 4066 CMOS analogue switching IC (the other LFO is controlling the gate). The output is then sent to 2 piezo discs which is why the volume is so low.
Joined: Mar 19, 2011 Posts: 13 Location: Rochester
Posted: Sat Mar 19, 2011 8:41 am Post subject:
Former lurker coming out of the shadows. I wish I had found this forum a couple years ago when I started doing this stuff. I've made a bunch of CMOS oscillators (*yawn*) and noise boxes. I've yet to build anything really complicated, but I'm starting to get ideas for a big patchable CD4000 synth. Anyways, here's my most recent build:
It's my take on the Bug Brand Board Weevil. Three 40106 square waves with switchable hi/lo range and psuedo sync run into two XOR ring mods with a pot to blend between the two XOR outputs. The red things at the bottom are body contacts. The big knob is voltage starve.
4 4093 oscillators split into stereo pairs and a stereo panner built with a 40106 and homemade vactrols. When you patch one channel of the panner into the other channel, it works like a primitive envelope generator/vca (no idea why this works, but it does). Here's a clip: http://soundcloud.com/martin-freem/growler-v2
Joined: May 18, 2010 Posts: 308 Location: Oak Park, IL
Audio files: 5
Posted: Sun Mar 20, 2011 9:42 am Post subject:
Great looking Dirty Bomb there sndbyte ! I have to spend little more time and see what you put in that case. Very slick design.
And Repeater - Welcome aboard Thanks for sharing your sounds and pics. Looking forward to seeing what you come up with in the near future. _________________ Zontar Prevails!
Great looking Dirty Bomb there sndbyte ! I have to spend little more time and see what you put in that case. Very slick design.
And Repeater - Welcome aboard Thanks for sharing your sounds and pics. Looking forward to seeing what you come up with in the near future.
Thanks, I don't think I'd ever take one of my little noise making machines on an airplane. I imagine security would have a lot of questions!
i actually brought one of my diy-synths on a plane from the USA to europe and before i went through security i said "look i have this synth thing in my backpack, should i take it out?" the security guard said "no its fine". then when i went through the baggage xray the operator got all flustered and said "we have a problem here!" i was waiting for her to say something like "looks like a weapon"... but she then said "looks like a... uhh.. uhh... video game system or something?" lol. they opened the bag "what is this thing?!" "it's a synth i build" "oh... uh alright, you're clear."
moral? you might get funny looks coming from the USA. When i came in to germany they didnt ask about it, when i left they said "is this yours? ok." and when i got back into the states they didnt say anythign again...
Joined: Mar 19, 2011 Posts: 13 Location: Rochester
Posted: Sun Mar 27, 2011 9:07 am Post subject:
another not-quite Lunetta from me:
It's a clock/divider (40106/4040). Each toggle switch turns on a division (0-5 octaves down). Then there's a range rotary switch (220uf/47uf/10uf/.1uf) for the timing capacitor on the 40106.
Why even bother with a step sequencer? My big Lunetta project will definitely include a pair of these things.
Anyone know how to add a CV input to the 40106 clock itself? I've read that negative voltages fry CMOS and I'd like to be able to get it to receive signals from my modular synth without the risk of burnout. Maybe just adding a squared up audio input is a better option?
Nice sounds there repeater, welcome to the wonderfull world of lunetta synth making.
As for the 40106 CV input, you are right about it not accepting negative voltages. If you have a positive voltage you can use the YAVCO:
http://electro-music.com/forum/post-241976.html _________________ There he goes. One of God's own prototypes. A high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die.
Hunter S. Thompson movies noise
Wow, great idea. I suspect that if you split the voltage to other 40106s and mess with the resistor in between pins 1 and 2 on each 40106 and the timing capacitors, you can get harmonized oscillators.
Posted: Sat Apr 02, 2011 2:35 am Post subject:
Some CMOS things
hey everyone, here's a likn to a pile of CMOS stuff I built with somehelp from this site. thanks to all of you for the helpful articles and forums and things
http://www.youtube.com/user/TeamToothpaste
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Thanks mosc! as we all know a picture speaks a thousand words, and a video is made of thousands of pictures! meant to say there's a few video's on you tube, here's my favorite
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Thanks for sharing your sounds and pics. Looking forward to seeing what you come up with in the near future.
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