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Logan writes in with his custom plans for a box synth, the aptly named Squarecave –

This is a project that I have been working on for quite some time: it is a DIY music synthesizer that uses 4000 series CMOS ICs as oscillators and an 8 step sequencer, then uses analog filters to shape the sound.

22 unlabeled knobs enhance synthy mystique. He gets a lot of interesting sound out of a relatively low number of parts – reminiscent of the WSG.

Schematic, pics, video & samples Squarecave @ 47Ω.com

Weird sound generator kits

In the Maker store:


Loud Objects Noise Toy Kit

Collin Cunningham

Collin Cunningham

Born, drew a lot, made video, made music on 4-track, then computer, more songwriting, met future wife, went to art school for video major, made websites, toured in a band, worked as web media tech, discovered electronics, taught myself electronics, blogged about DIY electronics, made web videos about electronics and made music for them … and I still do!

  • John

    Link did not work for me, but GIS for “squarecave” gives

  • Collin Cunningham

    thanks – updated