4-20mA output circuit

[ankur13d]

Hi,
I want to design circuit that gives 4-20mA output;
I can use any DAC IC that gives 4-20 mA output, but how can i make a circuit using opamps by giving my output from DAC of any microcontroller that works on Vref of 3.3 V.

 

[KlausST]

Hi,

did you do a search in this forum? Or in the internet?
There are a lot if threads, I posted in many if them. Even schematics...

I recommend to read through them, decide which solution fits best, then come back with this schematic to discuss about it.

There are many possible solutions, there is no "best" for every application.

Klaus