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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
I believe in newer Picos I've been using a PMEG3005AEA - but then there is a protection fuse as well.
I'd say in an ideal world try and get a more powerful diode AND a 500mA polyfuse in there if you really want to be safe, but I guess maybe a smaller diode that will sacrifice itself is best if there is no fuse :)