The CMOS Orchestra > 2017

Yearly Archive: 2017

Delays lays lays

My my first effect build I wanted to do a delay so I went and shopped around for designs. I found some cool ones there, based on the cheap PT2399: http://www.diystompboxes.com/smfforum/index.php?topic=60662.0 http://www.tonepad.com/getFile.asp?id=98 And here’s the PT2399 specs sheet: http://www.princeton.com.tw/Portals/0/Product/PT2399_1.pdf I build two different designs from very simple to a bit more sophisticated. The first has only a time control and…
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The OP-HPF High Pass Filter

I wanted to have an Isolator-style high pass filter device to play with. I found this design at https://www.eeweb.com/blog/circuit_projects/20hz-to-200hz-variable-high-pass-filter that uses a very common op-amp, the TL072. And there I found the design for a 555-driven negative voltage generator, needed for the TL072: https://www.allaboutcircuits.com/projects/build-your-own-negative-voltage-generator/ The only case I got is that Walkers biscuits box. Well English. I punched two holes to mount a rotary…
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The NZO-Control footswitch midi controller

My good friend and great guitarist Nzo needed a simple and heavy-duty footswitch midi controller… This Hammond case I found on Ebay was a perfect fit for this project. I took to the Arduino to manage the Midi part. I found these great Single-pole Single-throw switches on Ebay as well. Just a led and a resistor, VCC/Gnd and signal wires on…
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Nano-B the 2.50 Euros synth!

This is loosely based on the excellent series by Elliot Williams from hackaday.com (http://hackaday.com/tag/logic-noise/) . This is an awesome source to get into audio hacking. Here’s the BOM and price list: Breadboard             1.00E 40106 IC                 0.30E Switch                  …
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The Notes & Volts Audiuno Granular Synth

I’ve been interested in electronic music for a while, so I thought I’d just try to build my own synths. I found this great website http://notesandvolts.com and its Arduino-based synth “Auduino”… Let’s get to it..Soldering stuff, resistors, wires, breadboard, pots, Arduino and more. First I built an Arduino on a breadboard using an ATMega 328 (tut on the Notes and Volts…
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