You are reading a single comment by @wardy and its replies.
Click here to read the full conversation.
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.
@wardy
Yes that's great help thanks! My only question now is about how the square wave on A5 can be between 0 and -3.3V when A6 is 0. Is this a good answer http://electronics.stackexchange.com/questions/10322/what-is-negative-voltage ?