List of my videos https://www.youtube.com/c/electronzap/videos https://www.youtube.com/@Electronzap/community for most of the diagrams I've used in my videos. https://www.amazon.com/shop/electronzapdotcom As an Amazon Associate I earn from qualifying purchases. Americans should check out one or more of those links before making any purchases. There's no extra cost to you. https://www.patreon.com/electronzap https://electronzap.com/ https://www.reddit.com/r/ElectronicsStudy/ Operational amplifiers (op amp) compare the non inverting (+) input to the inverting (-) input when determining the output voltage. The output tries to me more like the + input. Therefore, the output will be high when the + input has a higher voltage than the - input. Whereas the output will be low when the + input has a lower voltage than the - input. Without feedback, the output is either as low of a voltage as it can give, or as high of a voltage as it can give. When the signal is applied to the inverting input when a reference voltage is applied to the non inverting input, then the output will be inverted compared to the signal. Higher voltage at - than + equals low output. Lower voltage at - than + equals a high output. #Electronics #Howto #diy ... https://www.youtube.com/watch?v=WXgRjMquxCo