Making music on the move is a fun way of experimenting in a different setting, inspired by the scenery on trains, planes and in automobiles! The Cyber CIty Mini-Tone Keyboard is a nifty little design, with 2.5 octaves of notes, an on-board speaker, and a 3.5mm line out jack for plugging in your headphones!
Powered by a ATmega328 microcontroller, this pocket sized synth can be taken anywhere you can find USB power. It comes fully built with 4 WS2812 RGB LEDs, which are also known as NeoPixels, so you can be sure of bright vibrant colours! It uses a CH-340G USB interface making it fully Arduino IDE compatible and programmable from standard Arduino devkits.
Each time a key is pressed a little synth tone is emitted and the LEDs cycle through the various colours. Everything is housed on the PCB with surface mounted chips and components, giving it a very low profile and definite pocket appeal!
Both the source code the documentation are available. Check out the video below for a brief overview of its features.