Measure current with Arduino Split Core Current Transformer, CT Clamp Current Sensor Arduino
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Project Description:
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In today’s episode, you will learn how to measure AC current with Arduino using a Split Core Current Transformer or CT Clamp Current Sensor which I recently got from the DFRobot. Previously, I used the Max471 and ACS712 current sensor modules for measuring the current. I used The Max471 Current sensor for measuring the current of a 12V DC MCPCB LED module and I used the ACS712 current sensor for measuring the AC current as I had to monitor the Load status. With ACS712 Current sensor I was able to monitor whether the load was normal or it was overloaded.
No doubt, the ACS712 Current sensor module is the cheapest while the Gravity Analog AC Current Sensor is a bit expensive which costs 19.9 USD dollars. But still, I recommend this Split Core current transformer over the ACS712 and other low-cost AC current sensor modules. Because, if you go with the ACS712 current sensor module then you will have to cut the wires so that you can connect the ACS712 current sensor in series with the load which is quite a time-consuming job, and also there are high chances of getting an electric shock.
While on the other hand the Split Core Current Transformer eliminates the need to cut wires. Simply clamp the AC transformer probe on the AC line, and then plug the 3.5mm headphone jack into the signal conversion module to read the AC current value. The analog output is designed to be compatible with 3.3V and 5V compatible microcontroller boards. It can be conveniently used for AC current measurement to monitor AC motors, lighting equipment, air compressors, etc. So, using this Split core current transformer with Arduino you can build yourself a smart home energy meter.
For demonstration purposes, I am going to measure the current of these 4 lights, I will be connecting one bulb at time, and then we will see how the load current varies. So, before I am going to explain the technical specifications, circuit diagram, and programming, first let’s watch the Split core current transformer sensor in action.
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