Hi guys,
I am looking for some some help with 4-20mA circuit.
The basic setup is a micro controller with 8 to 24 digital inputs. Each input is one on / off sensor. Together the inputs form a stepped level for a column of water. 8 sensors = 8 steps, 14 sensors = 14 steps etc.
I am trying to create a 4-20mA output using the micro controller and any other components needed. I was hoping that the micro controller would be able to take the digital inputs and generate a 4-20mA signal.
I really do not know where to start, I am not an electronics expert or had any experience with 4-20mA circuits.
Could someone point me in the best direction for this. I am happy to use an AD421 if this is the correct way to go. An help would be great but please don't talk technicals because it will go over my head. I understand basics of 4-20mA and very basic functions of micro controller. The micro controller has not been selected yet, but looking at a 64 pin ARM Cortex (NXP 9MKE04Z64VLH4)
I am looking for some some help with 4-20mA circuit.
The basic setup is a micro controller with 8 to 24 digital inputs. Each input is one on / off sensor. Together the inputs form a stepped level for a column of water. 8 sensors = 8 steps, 14 sensors = 14 steps etc.
I am trying to create a 4-20mA output using the micro controller and any other components needed. I was hoping that the micro controller would be able to take the digital inputs and generate a 4-20mA signal.
I really do not know where to start, I am not an electronics expert or had any experience with 4-20mA circuits.
Could someone point me in the best direction for this. I am happy to use an AD421 if this is the correct way to go. An help would be great but please don't talk technicals because it will go over my head. I understand basics of 4-20mA and very basic functions of micro controller. The micro controller has not been selected yet, but looking at a 64 pin ARM Cortex (NXP 9MKE04Z64VLH4)