@Mrbbp no problem :) You want to connect your input voltage to what's shown as BAT_IN here: http://www.espruino.com/Pico#pinout
BAT_IN
Ideally just the 5v signal from the board though if you can, rather than 12v.
@Gordon started
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.
@Mrbbp no problem :) You want to connect your input voltage to what's shown as
BAT_IN
here: http://www.espruino.com/Pico#pinoutIdeally just the 5v signal from the board though if you can, rather than 12v.