detection of voltage in faraday induction by arduino

Other Hardware Sensors
1

Dear all,

I want to detect induced voltage on a conductive ring when a magnetic field was changed. The amount of voltage is not matter for me. I want to do this by Arduino UNO R3. But I don't know how to do it as well as say you that i am new to Arduino.

Thanks a lot
Farrokh

2

I want to detect induced voltage on a conductive ring when a magnetic field was changed.

You can't.

3

I think he's trying to say that an unbroken ring develops no voltage, even if there is current flowing in the ring.

Perhaps a better word might be "coil"? It should not be hard to detect a voltage with a coil.

4

MorganS:
I think he's trying to say that an unbroken ring develops no voltage, even if there is current flowing in the ring.

Perhaps a better word might be "coil"? It should not be hard to detect a voltage with a coil.

Can the ring be made one 'winding' of a transformer to measure the current flowing in it?

5

Yes but the question was about measuring the voltage of the cause of eddy currents. To which the answer is you can't.

6

MorganS:
I think he's trying to say that an unbroken ring develops no voltage, even if there is current flowing in the ring.

Perhaps a better word might be "coil"? It should not be hard to detect a voltage with a coil.

Thank you, sorry, I mean was "coil". how to measure voltage in coil?

7

Use an analog pin to measure coil voltage. The coil will require thousands of turns in most cases.
Bias the coil so that the voltage on the pin is not negative.

8

Dear all,

When the amount of magnetic flux is changed on a coil, then a current will induced on the coil. therefore, a there will be a potential difference between two ends of coil (Faraday Low). I want to measure potential difference of two ends of the coil. In order to measuring, I put one end of the coil into analog pin A0, and other one into GND. Now let magnetic flux to be change. My question: at all, is this manner correct? Do these selection of pins is correct? any suggestion please?

Thanks in advance
Farrokh

9

You can only connect a positive voltage to an analogue input pin. And that voltage must be equal to or less than the analogue reference voltage. Have you taken steps to ensure that these requirements are met?

10

OldSteve:
You can only connect a positive voltage to an analogue input pin. And that voltage must be equal to or less than the analogue reference voltage. Have you taken steps to ensure that these requirements are met?

thanks a lot,
up to now, i have not taken any steps for this goal. at first, i wanted to know and ensure how can i do that.
please give me additional information.
Best regards.

11

farrokh:
thanks a lot,
up to now, i have not taken any steps for this goal. at first, i wanted to know and ensure how can i do that.
please give me additional information.
Best regards.

I have no idea what voltage you will generate, or the polarity & waveform. You could potentially use a Zener diode to protect the input, or additional circuitry to process the signal to bring it within limits.
A lot more information is necessary than simply this:- "When the amount of magnetic flux is changed on a coil, then a current will induced on the coil. therefore, a there will be a potential difference between two ends of coil (Faraday Low). I want to measure potential difference of two ends of the coil."

12

thanks a lot,
up to now, i have not taken any steps for this goal. at first, i wanted to know and ensure how can i do that.
please give me additional information.
Best regards.

Hi,

It's you that have to give additional info:

What is the voltage the coil is working at?

What is the current drawn?.

What is it for? (not estrictly neccessary, but desirable)

Best regards.

13

Cross-post

14

AWOL:
Cross-post

Thanks for pointing that out. I won't waste any more time.