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Thread: 2 Sensor connection Q's

  1. #1
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    2 Sensor connection Q's

    1) Current sensor has a 3 pin connector with the left, when looking at it with the pins at the bottom, marked "P1" is this correspond to "+" on the Brain?
    What value should I get with no current through the sensor?

    2) I've connected the voltage isolator as per, http://www.mp3car.com/vbulletin/fb-s...ml#post1337788, I think, see attached image, but I'm not getting the expected result. Expected 4.6volts(940) but I'm getting 1.7(350)

    EDIT: OK my "guesses" for the current sensor were correct. Have it connected to the brain and outputting around the 511(2.5v), is there any way to dampen it, so that the output doesn't jump around?

    Willem
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  2. #2
    Fusion Brain Creator 2k1Toaster's Avatar
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    1) Yes that is the correct way to connect the current sensor.

    2) You are getting the correct voltage for the production boards. The beta boards were different than the production boards. You can alter it by changing the values of R17 through R20.
    Fusion Brain Version 6 Released!
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    30 Digital Outputs -- Directly drive a relay
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  3. #3
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    Quote Originally Posted by 2k1Toaster View Post
    1) Yes that is the correct way to connect the current sensor.
    Thanks for the response, which only leads to more questions

    As mentioned with the current sensor with no current running through it I get values from approx 507 to 517, which is creating a very jittery needle display in my CF plugin. Is there a way of dampening this variation either via hardware, maybe putting a capacitor across the voltage out, or coding.

    2) You are getting the correct voltage for the production boards. The beta boards were different than the production boards. You can alter it by changing the values of R17 through R20.
    If I understand this correctly, I won't see the full 0-5v(0-1023), which is what I was expecting, without adding a custom resister value to say R17.
    As to the custom voltages I'm still trying to understand the formula given

    Sorry for being so dense.

    Willem

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