MIDI Input (Troyka Module)

Vendor code AMP-B082
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1 pc.
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Connect a computer to your home recording studio or create a DIY synthesizer with fresh beats using a compact MIDI input.

This Troyka module will take digital sound from any compatable equipment via MIDI interface.

What is MIDI

MIDI (Musical Instrument Digital Interface) is a popular standard for exchanging digital data between musical instruments, stage equipment, switches, and computers.

MIDI defines a single encoding format for keystroke data, audio parameters, and advanced hardware settings. The interface allows the artist to press a key on one instrument and get sound from another. Any change in the position of keys, buttons, or knobs is encoded into commands that can be transmitted via MIDI cables to other instruments. The device that receives the command reacts as if someone had pressed its keys.

At the physical level, MIDI is a unidirectional interface that combines devices on a single bus. The signal source transmits data over two wires up to a distance of 50 feet. The signal is transmitted at a current of 5 mA, where the current is switched on by a 0, and off by a 1.

The receiving module is equipped with an opto-coupler allowing you to break the direct electrical connection between devices. Even if one of the devices breaks out in fire (from your new mixtape), the remaining devices will remain unscathed and unharmed.


The module communicates with a controller board via a protocol similar to UART.

The upper group of contacts are for data exchange:

  • S - connect to the RX pin of the microcontroller
  • V - connect to the power supply (3.3 - 5 V)
  • G - connect to ground

When receiving data, the green LED on the module will light up.

There are several different ways to wire this module:

Troyka Shield. The most straightforward method. Connect the module to a pin group on Troyka Shield with the 3-pin jumper cable and you’re ready to interface with it from your Arduino.

Troyka Slot Shield. The best choice for quick prototyping. Using slots on the shield, you can get rid of cables. The module will be held securely in place using both pin headers.

Breadboard. For advanced use. Troyka pin headers have 0.1” spacing which is compatible with any breadboard. Simply wire the module like you would do with any IC.

Package Contents


  • Supply Voltage: 3.3 - 5 V
  • Operational Temperature: -40 to +85 °C
  • Dimensions: 25.4 × 25.4 × 30.5 mm (1 × 1 × 1.2 in)