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Questions tagged [current-sensor]

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1answer
47 views

Battery level sensor

I'm designing a smart bin for my paper and would like a sensor that continuously monitors the battery level in real time and in percentage value and then sends the data to the administration office. ...
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1answer
35 views

How to measure load detection for ballast output 18W

I have a high performance ballast of only 18W and 36W. I would like to do a detection circuit whenever the UV light tube does not have any light out, an alarm/signal can be triggered to replace the ...
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1answer
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Is there a way to put a relay in series with another load?

To layout my situation, I have a 12V DC pump with a built in float switch that I don't want to try to crack open and possibly compromise the waterproof of. The pump draws around 6-7 amps. I would ...
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1answer
63 views

hardware interfacing and data logging

I am working on a idea. The idea is to measure current from a current source, which transmits 3 levels (ex: 10 20 30mA). Which if possible should be logged, representing 3 states with 3 different ...
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2answers
115 views

Real Time AC Current Sensing [closed]

I'm trying to analyse the harmonics present in different household devices's current waveforms. For this, I need a CT based current sensor which can sample data quite accurately and quickly (around 5% ...
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1answer
607 views

wcs1800 current sensor (with sensitivity of 66mV/A) output voltage varies unexpectedly with a range of 10 - 20mA

I am using wcs1800 sensor to read current in the range of 100mA to 30A, even though the sensor has a sensitivity of ~66mV/A (5V input) and ~50mV/A (3.3v input) the output voltage is varied in the ...
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1answer
226 views

4Amps current sensor circuit with lm358

I have a 12v motor. I want to operate 12v 7amps relay with lm358 opamp. when my motor is operate it gives 0.8 Amps, but when it get jammed then it consumes 4Amps, at that time I want to cut down my ...
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1answer
195 views

Calculate the input impedance of a passive AC voltage sensor

I got a AC voltage sensor to measure AC voltage. And I want to know its input impedance. But the sensor's data sheet only tells how to use it, doesn't tell the internal details. It's used as below: ...