The MIDI Music Kits use a combination of MIDI (Musical Instrument Digital Interface) using the MIDI IN/OUT assembled board, and the Arduino microcontroller assembled boards, which use the ATmega microcontroller. Each product comes with a pre-programmed Atmega microcontroller pre-loaded with the required project. Some of the MIDI Kits have a direct MIDI OUT connector, via suitable series resistors, where no MIDI IN is required.
The MIDI IN/OUT board can be used with any microcontroller which contains a UART, including the Arduino ATmega, PIC etc. microntrollers, to send and receive MIDI messages.
Generally pedalboards range in size from 13 notes on small organs to 32 notes on church or concert organs, some electronic organs and many older pipe organs have 25-note pedalboards.
MIDI keyboards come in a range of sizes, from 25 keys (two octaves) to full 88-key length.
The MIDI Channel Changer/Combiner can be used to combine MIDI channels (1-16) onto a single MIDI output channel.
The MIDI Channel Filter can be used to reduce MIDI throughput by removing MIDI System mesages. Also it allows one channel to operate a particular sound module/synthesiser, while filtering out the other MIDI channel data.
These units utilizes MIDI Note ON/OFF data to control LEDS, Relays, Transistors, Triacs, etc. to switch Lights, Motors, etc. when combined with suitable output circuitry