coming soon
In-browser flashing works in Chrome or Edge. ⚠️ Disconnect Eurorack power before connecting USB.
Hold BOOTSEL on the module while connecting USB, then click Flash and pick the RP2 device.
Maddie MOD2
Clap
Drums · Percussion
A TR-808-style digital hand-clap: gated noise bursts into a band-passed exponential tail.
- Width
- 4 HP
- Depth
- 28 mm
- Power
- +12V / −12V / +5V
- MCU
- Seeed XIAO RP2350
- Controls
- 3 pots · button · LED
- I/O
- 2 gate in · 1 CV in · PWM audio out
Overview
A TR-808-style hand-clap: two short gated noise bursts followed by an exponential noise tail, all shaped by a band-pass filter. The LED follows the envelope, an accent input drops the level by 6 dB, and the three pots dial in the filter’s Q, the decay time, and the band-pass centre frequency.
Panel & I/O
| Control | Pin | Function |
|---|---|---|
| POT1 | A0 | BPF Q (0.5–4.0; left = wide, right = narrow) |
| POT2 | A1 | Decay time (20–200 ms) |
| POT3 / CV | A2 | BPF Fc (50 Hz – 8 kHz) |
| IN1 | GPIO7 | In — Trigger (rising edge) |
| IN2 | GPIO0 | In — Accent (HIGH = −6 dB) |
| BUTTON | GPIO6 | Manual trigger |
| OUT | GPIO1 | Out — 10-bit PWM audio |
| LED | GPIO5 | Envelope follower |
Features
- Authentic three-burst 808 clap structure
- Band-pass filter with adjustable Q and centre frequency
- Accent input for dynamics
- LED envelope display
© 2026 Maddie Synths · firmware based on work by Hagiwo · original firmware CC0 1.0 · hardware design by Hagiwo