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Measure current using a microcontroller

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jaime

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Hi

I would like to measure the current that wents in a dc motor (to pull up the car window), so if the motor stops, the current will goes up and i can turn of the motor. How can i do it using a pic?

thanks
 

You will have to use a high side or low side shunt and amplify the small signal with
a low offset amplifier and fallow it with a comparator. the output of the comparator can be monitored by the PIC to protect your motor.
 

easiest way is to use something modular. there is companies producing current sensors. one of them is allegro micro.
their web site:
www.allegromicro.com
here is current sensors:
**broken link removed**
and this may be appropriate for you:
**broken link removed**

also you can request sample....
(and lem is another popular current sensor produser: www.lem.com)
 

Same discussion going on in another topic.
Take a look at:


S.
 

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