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NAND-Gate Oscillator Synth

Posted on April 28th, 2012

While casually searching for simple oscillator designs, I came across this design. It’s just a simple NAND-gate! It couldn’t get any simpler than that :)

There are other simple designs: 555 Timer Oscillator, Twin-T network, Wien bridge oscillator and the perhaps simplest, just 1/6th of a 40106 Hex inverting Schmitt trigger.

Since I didn’t have any 40106 chips laying around, but did have some logic gates, I decided to make a small noise maker based around a 4011 Quad Nand Gate…

Behold, the NANDSynth:

At first it was surprisingly glitchy, but after a few adjustments, it stabilized and produced a steady oscillation. But how fun is that? I spent the next few hours just poking around with capacitors, LED’s, resistors and wires… Not knowing what you’re doing is half the fun :)

Anyways, I wrapped it all up in a little cardboard box and called it NANDSynth..

And this is how it sounds with a huge reverb and some delay
(because honestly, it sounds annoying as hell on its own)


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Building a modular syntheslicer

Posted on April 26th, 2012

Check out the amazing progress from bags of resistors and sheets of plexiglass to a working modular synthesizer.

Click >HERE< for some juicy pictures, sounds and incoherent ramblings.

So I’ve been keeping myself busy during the last few weeks, building my very own modular synthesnajser!
So far I’ve built all the PCB’s from MFOS that I bought. and every single one works perfect!

In the rack at the moment I have: MFOS VC LFO, MFOS Dual AR-Generator, MFOS Dual Log/Lin VCA, MFOS Noise Cornucopia, MFOS 24dB LowPass VCF, MFOS State Variable VCF, MFOS 16-Step Sequencer and a semi-functioning MFOS SoundLab MiniSynth.

(If I find the inspiration to write, I’ll assemble a longer article about the project here on devsound…)


DIY Layout Creator

Posted on April 19th, 2012

If you’re designing and building stuff on breadboards or stripboards, check out this free, neat program.

It’s the easiest one to use that I’ve found so far. Just select what breadboard you’re using, start placing out the components and connect them up with jumpers and cables. The selection of components is quite limited, but all the essentials are there, like DIP-format IC’s, resistors, diodes, capacitors and such.

When you’re done, you can export the design to PDF or a PNG-image.

It’s written in Java, so it requires that to run. I’ve only tested it on Windows, but it should run on other platforms as well.

Download here


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Parallelogram – An FPGA demo

Posted on April 17th, 2012

Sir Linus Åkesson (Chipophone, Bitbuf, and more) has made something again. As usual, it’s over-the-top cool :D

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“Crystal cMoy Freeform Headphone Amp”

Posted on April 17th, 2012

Check out this awesome headphone amplifier! It’s built point-to-point and cast in polyester resin.

Visit Run Away Brainz for more stuf and such.

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