is it safe for esp32 to send 5v to vcc? I'm worried that digitalRead could damage microcontroler by sending 5v data to 3.3v pin. In other case can i send 5v and only use digitalWrite to pcf, so that no data is recieved to microcontroler, protecting it?
hi, i already see the code, and i think that was active low for the relay. but in my case, I want use active high relay, did u know something to use active high with pcf8575 ?
Hii can you please upload a video . How to connect ( 2 - I/O port expander ) directly to arduino uno board I want to connect 25 relay chanel that's why . I don't know how to connect 😕 2 expander to arduino uno and write programming of 2 different expander address on it please help
Hey, that sounds like a cool idea. I will have it listed in my future videos. In the meantime, please subscribe to my channel if you have not done so. This would get you notified of any new content.
hey sorry for the delayed reply. Not sure why there is no notification for your comment. I have not encountered this issue in using this library. Maybe this was handled by the library itself.
