New answers tagged 4-20ma
1
vote
0-10V or 4-20mA conversion to 0-3.3V for Microcontroller ADC
This simple solution might work:
simulate this circuit – Schematic created using CircuitLab
Your error likely comes from your diode. Zeners are a poor choice in your circuit. D1 clamps the ...
- 5,092
0
votes
0-10V or 4-20mA conversion to 0-3.3V for Microcontroller ADC
In this design I've mapped the current-loop inputs to the analog input range 0.0 ... 3.0 V.
I chose 3.0 V as maximum to add some leeway in case I had to calibrate the inputs. The voltage followers ...
- 4,550
2
votes
Accepted
0-10V or 4-20mA conversion to 0-3.3V for Microcontroller ADC
We don't know anything about the ADC, so it's impossible to know what to do to protect it. All we can do is make sure it never sees a voltage outside the range 0V to +3.3V. That's easy to do with an ...
- 42.1k
1
vote
0-10V or 4-20mA conversion to 0-3.3V for Microcontroller ADC
The 3.3V zener diodes are going to cause large errors near the high end of the inputs. Here is a simulation showing the nominal errors with one particular 3.3V Zener (not counting Zener tolerance, ...
Top 50 recent answers are included