Electronics LED used as bright light sensor to control LM747 747 dual op amp integrated circuit LEDs

A bright light on an LED causes it to act like a mini solar cell, creating a voltage and a tiny amount of current. It's just barely enough energy to give a high signal to the non inverting input of a 747 comparator circuit as demonstrated in this video. https://www.amazon.com/shop/electronz... for links to where I bought most of the things I use in my videos. Electronzap earns money from this storefront.   / electronzap   If you'd like to support my efforts directly. #LEDs #LM747 #opamp