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About $3 in parts (no ICs), and a tl072 arpeggiator needs a TLC7524/AD7524 (a simple DAC that's still sorta analog) and a switch to disable reset (run once). Momentary-normal-off pushbutton to manually reset. LEDs: One per step, to set output voltages. (10) - One per step, to enable/disable gate per the.

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