« Return to Thread: Volume pricing for small hardware

Re: [PIC] current sensing with Hall sensor

by Bob Axtell-3 :: Rate this Message:

We use one in our instrument, to determine when the motor is pulling
current and determine which way it is being turned. It works OK; I'd
like more sensitivity (FS = 10A would be ideal)
but it works fine.

Note: you MIGHT need to clean up the current if the motor is driven by
a PWM motor
speed control. An LC filter and an MOV work perfectly for this.

--Bob

On Thu, Nov 13, 2008 at 10:19 PM, Dr Skip <drskip@...> wrote:

> I don't remember who asked, but there was a discussion about using wire loops
> and Hall effect sensors for current monitoring a while back. I came across this
> and will be trying it, so maybe this will help the OP as well:
>
> http://www.allegromicro.com/en/Products/Part_Numbers/0756/index.asp
>
> 20 or 40 mV/A bidirectional and isolated. Only a decoupling cap suggested.
> Should be a nice easy pairing for a pic. Even cheaper than a shunt alone...
>
> -Skip
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>

--
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist

« Return to Thread: Volume pricing for small hardware