MatB

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• acs712

  @MatB started

  • 4 comments
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  @tage replied
• acs712

  in Interfacing • 8 years, 11 months

  

  Ah ok!

  So if I power the ACS712 from the VBAT pin from the board (I'm running from microUSB) that will keep it powered stably.

  I can then play around with the maths from there... Thanks for the help, I'll give it a go again later in the week.

• acs712

  in Interfacing • 8 years, 11 months

  

  Hi,

  I'm trying to interface my espruino with a ACS712 current detection board.

  I have the board sat between a source and a load, and have connected the out pin to C5 on my espruino. When using

  console.log(analogRead(c5));
  

  I get lots of values like this:

  0.49707789730
  pin
  C5
  0.49732204165
  pin
  C5
  0.49707789730
  pin
  C5
  0.49634546425
  pin
  C5
  0.49561303120
  

  But the values remain largely the same irrespective of whether the load is attached or not. I have read a couple of tutorials about using this board for arduino (here and here) but they seem to indicate that I just need to find some coefficient to multiply the values I'm reading by.

  Am I doing the right thing? Do I just have to find the "magic coefficient"?