4 step sequencer with vactrol VCO from concretedog on Vimeo.
So any free time this weekend has been spent creating this..Here we have a 4 step sequencer built from a 30p cd4017 chip and based on this schematic the clock input (tempo control) is provided by an oscillator built on a cd40106. At the moment its controlling a ghetto style VCO (the lower smaller circuit board) which is another oscillator built on a 40106 but being controlled by a hand hack vactrol, basically a light dependant resistor stuck to an led covered in copious amounts of gaffa tape!( I was going to use heatshrink as it is more lightproof but I didn't have any wide enough.) I've kept the different boards separate and have used an old IDE connector with its pins soldered into groups to act as a patch area....this is useful as I plan to build a few different modules and a few more VCO designs and this can serve as a test environment...before ultimately building a bigger sequencer (there's 10 steps available on each 4017!)
I'll post more as I add to it.
(BTW the audio in the vid above is just captured on the mic on my cam)
Excellent stuff. I'm really glad you're finding time to keep up the work as I know you're a busy guy these days.
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