Aciduino

The DIY Arduino-based Roland TB303 and TR808 Step Sequencer clone and MIDI Controller. Designed using readily available, inexpensive parts. It can be easily assembled on a protoboard or ordered as PCB.

There are two flavors of aciduino, the first version(v1) is a TB303 sequencer only, the second version(v2) is a TB303 and TR808 sequencer with oled display and step/pattern/mute grid system.

Find out more about at official home page

Aciduino V1

2 Tracks TB303 sequencer and MIDI Controller.

V1 on PCB

V1 on Protoboard

Aciduino V2

Up to 16 Tracks TB303/TR808 sequencer with step, pattern and mute automation grid system, MIDI Controller, OLED display and extensible modular design to plug more potentiometers, buttons, MIDI or CV/Gate interfaces.

V2 on Protoboard

V2 on PCB(prototype)

Features

303/808 Step Sequencer clone

Programming bass and drum steps using same analogy of original machines • Save your pattern work on microcontroller EPPROM memory for later live gigs • Use step length and shift to make some unusual sequences • Automation grid system for step edit, pattern navigation and mute tracks • Realtime and Step record modes for MIDI keyboard input(v2 only)

Professional grade Clock

Tight and solid clock system using hardware timers to achieve realtime professional grade tick system • Send or receive clock to keep all your external equipment synced

Generative Engine

Generate new and fresh acid music patterns by pressing a single button and twist some parameters • Harmonizer to force musical harmonic modes for bass lines • Euclidian generator for drum parts

Midi Controller

Controls up to 16 parameters per track of your external synthesizers(bass/drums) • Midi learn(v2 only) • 16 potentiometers modular support to extend aciduino as midi controller(v2 only)

Pattern memory

Store your patterns conveniently on the microcontroller's EEPROM, allowing you to access them effortlessly during live performances.

Easy and fast Assembly

1 or 2 hours assembly time on protoboard.

V1 Assembly

V2 Assembly