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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.
user66517
@allObjects
user66517, electronics is now so readily available and easy to use - and 'Tante/aunty google' is so helpful and patient - for example just enter circuit pin images in browser with google search enabled - and you get plenty of visuals and explanations.
For learning more about individual components - again - enter in the browser all about circuits diode for more about, for example, diodes, and you get (most of the times) as first link a point into allaboutcircuits.com' textbook(s) with lots of information.
Only one little thing you have to be cautious about: put the power on AFTER you complete AND VERIFIED your wirings with the right polarity... and if you use USB to power, you are even safe for the polarity. Disconnect power / USB BEFORE you make changes to your wiring... and you are safe as well.
You will enjoy tinkering in a new realm to which JavaScript and Espruino give you easy and fun access.