Classic Circuits You Should Know - Light Activated Switch

In this video we look at two things: 1. The LM393 comparator 2. Voltage Dividers We set up 2 voltage dividers. One with a potentiometer, to set our reference voltage. And one with a resistor/LDR combo that will change resistance based on the light level. The comparator looks at the reference voltage compared to the LDR voltage. If the LDR voltage exceeds the reference, then the LM393 switches on. ************************************************************************* *Please help support this channel at NO COST TO YOU. If you shop on* *Amazon, please use this link: * *I will get a small commission and it costs you nothing. * ************************************************************************* HEY YOU ABOUT TO POST SOMETHING STUPID: Yes, I know my hands are large/fat. It’s because of a heart condition I suffer from called Congestive Heart Failure. Here’s a link to some information about CHF: One of the symptoms is that it causes fluid retention, mostly in the hands, feet/ankles, and face.. ------------------------------------------------------------------------------------------------------------------- Support learnelectronics: Amazon Store: If you are shopping for electronic components, test gear or consumables please consider visiting my Amazon shop @ Paypal: you’d like to send a one-time donation you can use this link: --------------------------------------------------------------------------------------------------------------------- Gear I use: Multimeter: OWON B33 Oscilloscope: KIPRIM DS1202 Signal generator: Junctek JDS8080 Component Tester: T7 Multifunction Soldering Station: Sealody ???????