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Additives - labels, etc // one more vertical to mount the circuit board to, dead center // one more vertical to mount the circuit board sideways on module x1_7seg_14_22mm_display() { cube([12.25, 19.25, thickness]); } // Dinosaur Comics (alt tags+blog), CAD, attempt at OOTS (but that one uses a CA3080 OTA, an expensive and rare chip these days ($3/ea on amazon, maybe fakes) VCA MK's VCA Probably a straightforward build: one op-amp, four transistors and some.

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