4-20mA output using PWM

[gavo]

Hi There,

Has anyone tried to generate a 4-20mA output using PWM?, I am looking for a really easy way to generate a 4-20mA output without have to use the transmitter chips from Texas, any help would be greatly appreciated ;-)

[mister_e]

You want to search on the 4-20 mA theory first. Simple Google search here return over 1,000 hits.. sure it has something else than Cialis and Viagra in those.

No need for ANY 100% dedicated IC unless you're really clueless or you want to waste cash before january for your 2007 Tax report.

Think about it.. what's current? What's Voltage? how voltage is different of current? How current is different of voltage? What's common in both?

Now you have the solution.