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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@ClearMemory041063
Once you get a prototype working the next step might be to layout a PC board using CAD software such as Eagle.
The following link lets you create a schematic and layout the board.
Some PC houses are tied to the Eagle software and will supply a full blown version tied to their service. For now just download the free version so you can create a schematic.
Lots of tutorials on the Web
https://cadsoft.io/pricing/