You are reading a single comment by @allObjects 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.
@allObjects
...or are there Hall effect transistors involved? Depending on the type of Hall sensor, no op amp is needed. Check 'old' computer fans for it...