@iamnothere96 I do appreciate your good suggestion here, I am trying to understands its root cause of failure. Perhaps my CT model is incorrect or other AMPs are not working. Did you check the load heater connection ?
Kindly read the post carefully, everything is given. Make a difference when you want to use ACS712 and in this schematics. Do you have any similar simulation for ACS712?
@GolamMostafa great help.
How much is your expected maximum primary/line AC current?
Are you sure that you know the purpose of AREF-pin/signal of the MCU of the UNOR3 board of your #1? How much voltage is there based on your present ardware topology? (It sould be a stable DC volatge: 1.1V to 5.0V.)
What do you mean by load heater in this case? I did not have any external components with this board for current readings. Voltage was a bit different.
Np/Ns=Vp/Vs=Is/Ip, Ip= 20A
I am using Np/Ns input in Proteus model.
LC1 component in my proteus schematic.
Those sensors are meant for low voltage applications.
The sensors and the boards they are mounted on don't have the required isolation and creep distances to be safely used on mains voltage.
Only clip-on or feed-through current transformers should be used for mains power.
Leo..
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Can you post a similar circuit with this IC? @GolamMostafa
@Wawa I also believe that sensor doesn't fit with this application. I will modify my CT again, I think there must be some way to make it workable. Just need to apply proteus library before going to real experiment.
You place the ACS712's primary side in series with the 220V AC line so that only the load current passes through the sensor as depicted in #29.
It seems you value your life and the life of others less than I do.
Those sensors have less than 1mm trace spacing between live power and the Arduino.
Condensation or dirt could become leathal.
If you must use them, then at least use then in the neutral line.
Leo..
OpenEnergyMonitor has the goto circuit. No opamp needed.
Whatever you add between a CT an an Uno R3, you never will get a higher than 10-bit resolution (1/1024th of the CT's current rating).
A 12-bit or 16-bit external A/D is needed for a higher resolution.
Leo..
Yes! The sensor was inserted at the neutral side after the load as prescribed in the diagram of #29.
can you design this CT in SPICE or else