Hi DFRobot,In Malaysia, we use 240VAC from residence power supply and as per specification stated that, the AC Signal Input Range is in between 0 - 1V (AC). Does this means that i ...

Hey there,

Is it possible for you to share raspberry pi code as well?

Can I use this conversion module with the 100 amp range sensor? Can you make a conversion module for the 100 amp sensor? I will buy 200. thxs

Getting Zeros only on rduiono uno

Hi,
I bought your kit, it's great.
Can I connect a 30A or 100A sensor? Need to change something in the code?
Best Regards

Hello, in the sample code in the wiki you evaluate the Current value with the following formula:


/*The circuit is amplified by 2 times, so it is divided by 2.*/
voltageVirtualValue = (voltageVirtualValue / 1024 * VREF ) / 2;
ACCurrtntValue = voltageVirtualValue * ACTectionRange;


where the voltageVirtualValue is the voltage reading from the board and ACTectionRange is the maximum current value.
If so, should the ACCurrtntValue be measured as follows?


ACCurrtntValue = (voltageVirtualValue / VREF) * ACTectionRange;


In your formula you're multiplying Voltage and Ampere, so that the result cannot be a current.

Hello, I have the 10A version, and I've used this code for Arduino Mega, and works perfectly. When I used the same code, for an ESP-WROOM32 (modifing the vref value, the pin and the 1024 division) I get no values at all.
Same circuit, same sketch, (with thoose few tweaks): I get different results. ¿do you know why? Thanks in advance. (please write to me at diegosancho -a- gmail )

Hi, the sensor is to test the current through one wire.

why reading keeping 0.0A when using example code?

Hi,
You know it can clamp only one AC wire. How do you measure the power plug?

This can only measure the current value, can not measure the direction

Any guides or instructions on how to use this with a raspberry pi 2 or 3? Thank you

When will it be back in stock?

Hi, I would like to know what chip was used on the PCB. Is it some TrueRMS to DC chip + AD converter?

Thank you for your reply.

It seems that dividing by 4 simply makes the meter less accurate. I am unable to detect smaller currents, only large ones (over 500mA). Is that expected?

My HW voltages are as follows:
Vref = 3.3V
V+ = 3.3V

Yes I started with that code, but the problem is beyond that. The sensor is not even causing a blip on the analog pin, which I verified to be working. I've also verified the AC current exists with a multimeter.

Hi, can I use the same module with the yhdc transformer to 100A? (which has, 5v peak - peak), and about the programation, you use a delay of 50ms for high and low, if my AC current frequency is 60hz, should I change something?

Hi,
I know that the sensor board can't be sell itself, but can i buy the sensor board and 30A current sensor as a pack? Can DFRobot sell it?

Hi, sorry for the confusing, this is output signal for the probe, not detecting range. It is totally OK for 240V. Actually it makes no sense to consider the voltage of cable, there is no datum point.