# Low Current Sensor Breakout - ACS712 (SEN-08883)

**URL:** <https://forum.core-electronics.com.au/t/low-current-sensor-breakout-acs712-sen-08883/301>\
**Category:** Sparkfun\
**Created:** [19 August 2016 01:24 UTC](https://forum.core-electronics.com.au/t/low-current-sensor-breakout-acs712-sen-08883/301 "2016-08-19T01:24:02Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Core](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/core/32/57_2.png) [@Core](https://forum.core-electronics.com.au/u/Core)\
**Post date:** [19 August 2016 01:24 UTC](https://forum.core-electronics.com.au/t/low-current-sensor-breakout-acs712-sen-08883/301/1 "2016-08-19T01:24:02Z")

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This is a placeholder topic for [**“Low Current Sensor Breakout - ACS712”**](http://core-electronics.com.au/catalog/product/view/sku/SEN-08883) comments.

 ![](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/1X/94876e22b073769d29a7ffbdf9d462c69aef0fee.jpg)  
  
This current sensor gives precise current measurement for both AC and DC signals. These are good sensors for metering and measuring overall power consumption of systems. The ACS712 current sensor measures up to 5A of DC or AC current. We added an opamp gain stage for more sensitive current measurements. By adjusting the gain (from 4.27 to 47) you can measure very small currents.  
  
[**Read more**](http://core-electronics.com.au/catalog/product/view/sku/SEN-08883)

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**Author:** ![Downee](https://avatars.discourse-cdn.com/v4/letter/d/919ad9/32.png) [@Downee](https://forum.core-electronics.com.au/u/Downee)\
**Post date:** [19 August 2016 01:24 UTC](https://forum.core-electronics.com.au/t/low-current-sensor-breakout-acs712-sen-08883/301/2 "2016-08-19T01:24:03Z")

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I need to measure between 20mA and 5A. Does this unit have the resolution to do this? What is the output signal 0-5V?

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**Author:** ![Graham](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/graham/32/54_2.png) [@Graham](https://forum.core-electronics.com.au/u/Graham)\
**Post date:** [19 August 2016 01:45 UTC](https://forum.core-electronics.com.au/t/low-current-sensor-breakout-acs712-sen-08883/301/3 "2016-08-19T01:45:00Z")

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Hi,

This unit will output a voltage per mA but has an adjustable gain from 4.27 to 47. With that in mind, you could measure 20mA to 5A, however, it would be best to use a 10+ bit ADC