Raspberry Pi Forums

Posted: **Sat Jun 20, 2020 3:39 pm**

hi guys,
I'm using ACS 712 and mcp 3004 and i don't know how to read the current measurement from the sensor.
can u help me plz

Posted: **Mon Jun 22, 2020 11:07 am**

Because it is the same question I copied my post to here:

Brandon92 wrote: ↑
Mon Jun 22, 2020 9:46 am

mms112 wrote: ↑
Sat Jun 20, 2020 4:55 pm
can u show us the circuit plz
Did you check/read the link in this post, there are some schematics and a detailed explanation:
danjperron wrote: Maybe you should read that post
https://www.raspberrypi.org/forums/vie ... lit=acs712

I did explain all the equation there.

It will give you what we found about the ACS712, its resolution and the problem with the VCC power.
The ACS712 Vout has a VCC/2 offset so you need to read the 5V to have good readout.
Edit:
I copied this post to:
viewtopic.php?f=91&t=277847&p=1682632#p1682632

And to answer your question. What do you correctly have and was doesn't work.

Posted: **Tue Jun 30, 2020 2:28 pm**

it always give me zeros

Posted: **Tue Jun 30, 2020 4:54 pm**

mms112 wrote: ↑
Tue Jun 30, 2020 2:28 pm
it always give me zeros

You need to provide more information than that, because we can not see what you already tried or not. We would like to know:

what is your code
how did you connect everything
a clear picture of your setup, so we can check it

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