Hi,
Background:
I need to measure high DC 12V when charging/discharging current in my boat. Battery charger is rated 50 Amps and installation batteries are 2x200 Amps. I guess normal use onboard for TV, fridge, lights, navigation is some where between 1-10 amps.
Project:
My idea is to use a Hall-effect sensor connected to a INA219 connected to ESP8266 that measures the results from Hall-sensor.
The Hall-effect sensor I looking at is this:
https://flexscada.com/product/hall-effe ... -dc-100a/
The sensor measures up to 100 Amps DC and sends between 0V to 2,5V and 2,5V to 5V, where 2,5V is zero current.
Question:
What do you all think about using a INA219 to meaure the voltage from the sensor and feed it to Easy ESP and use a formula to calculate the current (positive when battery charger runs and negative when not and peripherals run).
br
Björn
High Current 100 Amps DC 12 V Sensor
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Re: High Current 100 Amps DC 12 V Sensor
Good to have things isolated when working with high currents.
A Hall-effect sensor is reacting to magnetic fields, so I don't know what may happen if an electric motor, some solenoid (e.g. in a relay) or alternator is active.
The magnetic field of current through a single wire is probably small relative to the fields generated by an electric motor, or a solenoid.
One thing you may want to look into is whether or not the output voltage of this sensor is high or low impedance.
If it has a high impedance, you can easily get extra noise on the line between the sensor and your AD converter.
A Hall-effect sensor is reacting to magnetic fields, so I don't know what may happen if an electric motor, some solenoid (e.g. in a relay) or alternator is active.
The magnetic field of current through a single wire is probably small relative to the fields generated by an electric motor, or a solenoid.
One thing you may want to look into is whether or not the output voltage of this sensor is high or low impedance.
If it has a high impedance, you can easily get extra noise on the line between the sensor and your AD converter.
Re: High Current 100 Amps DC 12 V Sensor
Instead of an INA219 current sensor, wouldn't a voltage sensor (AD converter) like ADS1015 or ADS1115 be much more convenient?
You might need a voltage divider to limit the range from 0-3.3V, but the result would IMHO be easier to obtain.
You might need a voltage divider to limit the range from 0-3.3V, but the result would IMHO be easier to obtain.
/Ton (PayPal.me)
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Re: High Current 100 Amps DC 12 V Sensor
Great point, I'll test with that!
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