Hi all I am new to hardware issues and I can use any help you can give me...I am working on a simple project with parallax basic stamp...I have to control a vfd that accepts 4-20ma...
Basically I was thinking to use a DAC chip controlled by the basic stamp....
the resolution at the moment is not a problem....8 bit will suffice I believe
I googled and one option I got was the AD421 but the problem is that it uses a mosfet that I cannot find anywhere the DN25D FET transistor from Supertex1.
What solutions can you suggest to my problem? Are there any alternatives both to the AD421 or the fet?