Hey has anyone dabbled using the arduino in a 4/20 ma loop? Not as a master but a slave, any reading material on making a general device would be helpful too, I figure the hard post its running an arduino at less than 4ma plus sensor, while putting the appropriate draw
Also need a supply too to power the Dino that handles maybe 36vdc and is effecient
I've not done it myself, but I've worked with a client on software for an atmel-based 4-20mA device. That project used an atxmega, probably because the built-in DAC made the 4-20mA output easier to do. I don't think you could do it will a normal Arduino because of the current draw of the USB-to-serial converter, but you could do it with a standalone atmega/atxmega chip that either runs at a low clock frequency or spends most of the time in sleep mode.