Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I read online I should not connect an i/o line from one Arduino to the i/o line of another Arduino unless the both share the same ground. Is that correct?
Maybe it can share the ground maybe not, it depends of the circuit you want or you did. If they share ground, yes you can conect them but if they not share ground you have to apply a diferential of potential in other, like an usb or ethernet where for the data there are two wires (one have a voltage for the other wire) because if you put just a wire without share ground there is not reference for the voltage and remember that a voltage is a potential difference.
I have two Arduinos each one is powered by a 9 volt wall plugin adapter.( I paid around 8 dollars for each plugin adapter ).
Can I connect the ground from one Arduino to the ground in the other Arduino?.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.