As shown in the figure, when my PC817 pin 1 is high level, IN5 should be low level normally, but after I tested it, IN5 is still high level completely.
How to solve it？
Have a question? Please contact us with details, and we will respond.
Look through existing questions to find popular answers.
Want to know more about Exchange and its possibilities?
Discuss challenges in energy and automation with 30,000+ experts and peers.
Find answers in 10,000+ support articles to help solve your product and business challenges.
Find peer based solutions to your questions. Provide answers for fellow community members!
Register today for FREE
Already have an account?Log in