I am at quite a loss. I am a real novice when it comes to electronics. I learned everything I know by starting with a microcontroller and releasing the smoke from several auxillary components until I stumble upon a circuit which works for what I would like to do. With that background perspective, I humbly ask for assistance on my latest project. I need to control an I/P transducer which operates on a 4-20mA loop. Now, first, I tried to use the PWM in the microcontroller to control the 4-20mA, and I was successful, however, it doesn't work the positioner. This, I am assuming is due to the fact that the positioner data sheet states that the electrical requirement is a 4-20mA loop @ 7.2Vdc. Rats, foiled again!! Will an analog output IC be the easiest way to produce this signal? I was told once that I might be able to use an AD420, but I, as stated before, really don't know much more about electronics other than Ohm's law, and that things don't work once you let the smoke out. Any help would be appreciated.
Thanks
Thanks