how to read the current from the sensor using nrf52840 DK board

[sharmelaraju]

Hi,

I need to read the data from the sensor MAXCESS  Digital load cell amplifier  in which the output we are getting in the form of current ( 4 to 8 mamp) not voltage. can you tell me how to read the  current from the sensor .can you tell me which example program do  i need to use .If i use ADC example program,  can i measure the current.Plz give me the solution

[Jared]

Hi,

The nRF doesn't have a built in feature that measures the current consumption of a pin. However, a method of measuring the current is by using a current shunt resistor and the ADC. You could use the ADC to measure the voltage drop over the resistor and then calculate the current by using Ohms law. You should preferably use a 1 ohm resistor, or even less if you need an accurate measurement.

regards

Jared 

[sharmelaraju]

Thanks for the reply. 

I will try.