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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.
@OwenBrotherwood
Can someone help with confirm this diagram for interfacing to 3v devices like puck.js?
http://www.espruino.com/HC-SR04 may then get a PR if an authoritative input is given
The diagram is stolen from something which I cannot remember.