HackPot – 17 Knob MIDI Controller

HackPot is a handmade, fully customizable MIDI controller built on Arduino Pro Micro, featuring 17 rotary potentiometers — all independently assignable directly from the device. No pads, no faders, just pure knob control.

HackPot uses a 0.96″ OLED display and a Navigation Rotary Encoder with push button to navigate its settings. Configurations are stored in an external EEPROM AT24C256 (up to 201 banks) and retained without power. It connects via Micro USB (MIDI IN & OUT) and includes 1× TRS 3.5mm MIDI OUT + 1× TRS 3.5mm MIDI IN for analog connectivity.

Key Features

17 rotary potentiometers — maximum knob density, every one freely assignable
Navigation Rotary Encoder with push button for menu navigation
0.96″ OLED display — real-time parameter monitoring and settings
Plug & play — USB bus-powered via Micro USB (MIDI IN & OUT)
1× TRS 3.5mm MIDI OUT + 1× TRS 3.5mm MIDI IN — analog MIDI for hardware synths and drum machines
External EEPROM AT24C256 — up to 201 banks stored directly on device
Copy & Swap — duplicate or exchange knob configurations
Magnetic connectors — chain multiple Hack Midi Mask devices side by side
Open source hardware — Arduino Pro Micro based, GPL v3 license

Full customization

From the OLED screen, select any of the 17 knobs and configure it completely: MIDI channel, CC number, minimum and maximum values. Use Copy to duplicate a knob’s settings to another, or Swap to exchange two configurations. Save everything into a bank in the EEPROM and recall it instantly — no software, no computer.

Magnetic connectors

HackPot’s magnetic side connectors let you place it next to any other Hack Midi Mask device — HackPad, HackFad, HackRot — and they share power and MIDI communication automatically, building a modular, expandable controller system without extra cables.