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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.
@Gordon
Hi Matt, As far as I know the 7805s do need some capacitors - even if they're only small. I'd check the datasheet for sure though. As far as heatsinks, you could just make sure there's an area of copper on the PCB, and could fold the 7805 over and bolt it onto the shield. Not that they'd get that hot unless you're drawing a lot of current or powering from a very high voltage,
I guess you could put a USB socket on it? that would ensure people only used 5v regulated supplies.
By the way - the 5v->VBat jumper will have the effect that everything will be powered up via Espruino (only at ~4.3v though) when you plug it into USB. It might be quite handy...