I wonder if there is a thing such as a "12 volt shield" which converts all outputs/inputs of Arduino Mega to 12 volts? I need to connect several 12 volt sensors to an Arduino Mega. 12 volt output (low current) is also needed. I would preffer to buy a readymade shield.
This shield does not adress the input problem. A resistor on the input pins would probably do (optocouplers would be better), but as I mentioned, I would like to purchase a readymade board which plugs into the Arduino Mega.
It would be perfect if there was a board which converted all Arduino Mega pins to 10, 12 or 24 volts (depending on the voltage of the external source).
Cars use 12Volt for all kind of things, and they sometimes use the CAN-bus (Car Area Network). So an Arduino shield with CANbus and some CAR-electronics?
Decided to build my own board using voltage dividers at the input and transistors for the output. 12/24 volt output/input is quite common, so eventually somebody will manufacture a board...