Only $ 29.95 USD + Shipping (PreOrder)

For the Main PCB, NOT the 3 x TM1638 PCBs seen in the video.
The Main PCB Has the ATmega328 (Arduino compatible) IC and the Flash Memory.

Detailed information

  • 16 Drum Tracks (note on/off, 3 velocity values).
  • 1 Accent Track. But each step can be set: Accent Track, Min or Max.
  • 8 Note Tracks (note number, 3 velocity values). Steps have the option of Slide and Note Off.
  • 30 Songs.
  • 64 Patterns per Song.
  • 16 Steps on screen, plus ABCD variations for a total of 64 steps.
  • Double Steps (in between steps option when editing the steps).
  • MIDI Processor Per Track. EG: Fade In, Fade Out, Fade InOut, Fade OutInt, Random Velocity and more.
  • Simple Hardware design, based on the easy to find TM1638 IC based boards. Just search on eBay and you should be able to find several options. We used 3 boards that has 8 x buttons, 8 x LEDs and 8 x LED_Segments. Such as THIS one. The board uses a single ATmega328 running at 3.3V, one FLASH chip for storage and connections for the TM1638 boards.

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Beat707 Mikro

Open Source Arduino Compatible MIDI Sequencer / Groove Box

  • 16 x 2 Steps (Double Steps) and 4 Pattern Variations (ABCD) for a total of 128 Steps per pattern on both Drum and Note Tracks, 99 patterns total.
  • 14 Drum Tracks, 2 Accent Tracks.
  • 09 Note/CC Tracks - Note# and Velocity per Step or MIDI CC (Controller) Type and Value.
  • Each step on both modes have: Off, Regular Note On, Double Note, Double Note In. On Note Tracks you also have Slide and Note Off.
  • MIDI Processor Per Track. EG: Fade In, Fade Out, Chords. Including a special Custom Chord creator, which allows you to create 12 different 5 key chords. Those will not follow the played key, but only the played octave. So you can add multiple C, D or whatever you want to different keys in an octave and have those play according to the played octave.
  • 99 Slots Song, with Pattern# and Repeat# per Slot.
  • 99 Songs Space with Song Name support.
  • Pattern and Song Modes.
  • Mirror mode for editing all the 4 Pattern Variations at once.
  • SD Card Support (required, as it stores program related data).
  • The hardware uses two Arduino ATmega328 compatible chips for parallel processing. One takes care of the SD Card and Interface while the other only Sequencing.
  • All SD Data is stored in .txt readable format.
  • LCD 16x2 Interface.

Only $ 29.95 USD + Shipping


About the Beat707 Mikro PCB: the only thing missing are the interface buttons which you will need to provide and attach to the PCB Main Headers.See the video on our front-page for details. The Headers has all the 11 buttons pins and ground pin ready for connection directly to any push button you may want to use. No keyboard matrix used, no extra components required as we use internal pull-up resistors for each button.


For more details about the software and hardware, visit the official product files on


We got 6 x Beat707 V1 Boards, the original Beat707 project, all ready to go!

Click the following button to purchase. Worldwide Shipping Included.

Only $ 39.95 USD + Shipping

I will post a link to the BOM and Schematics soon.

Cheers, WilliamK

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