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Maddie MOD1
Random CV
Random · Sequencer
A looping random CV and trigger sequencer with selectable length and trigger probability.
- Width
- 4 HP
- Depth
- 28 mm
- Power
- +12V
- MCU
- Arduino Nano
- Controls
- 3 pots · button · LED
- I/O
- 4× 0–5V jacks
Overview
A periodic random sequencer: it generates a repeating loop of random CV and trigger values whose length you choose (3, 4, 5, 8, 16, or 32 steps). Press the button or send a gate to F2 to re-randomize the pattern. A probability knob thins out the triggers.
Panel & I/O
| Control | Pin | Function |
|---|---|---|
| POT1 | A0 | Steps — length (3, 4, 5, 8, 16, 32) |
| POT2 | A1 | Level — output level |
| POT3 | A2 | Prob — trigger probability |
| BTN | D4 | Random value update |
| LED | D3 | CV output |
| F1 | D17 | In — Clock |
| F2 | D9 | In — Random value update |
| F3 | D10 | Out — CV |
| F4 | D11 | Out — Trigger |
Features
- Looping (not free-running) randomness for repeatable variation
- Selectable pattern lengths from 3 to 32 steps
- Re-randomize on demand via button or gate
- Trigger probability for sparser rhythms
© 2026 Maddie Synths · firmware based on work by Hagiwo · original firmware CC0 1.0 · hardware design by Hagiwo