I want to measure a small current of 0 to 4000 microamperes using Arduino. The existing sensors cannot measure this current. I want to use the LM358 module. Can you help me with ideas or information?
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I moved your topic to an appropriate forum category @naroui .
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Thanks in advance for your cooperation.
If you mean one of these, you cannot.
It can only measure AC voltages, not DC.
What is the voltage VDC that you have?
The current ranger is great for the very low currents. Study it's heritage and published technical articles for inspiration.
You need to supply more details so the best method can be determined...
What accuracy?
What resolution?
Low side (ground referenced) measurement acceptable or is high side required?
What load voltage and how much can be sacrificed for measurement?
Noisy environment?
Probably lots more but that's a start.
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If you use ground reference , and if your circuit allows , a 250 ohm resistor and set the internal reference to 1.1 volts that should give you full scale in the A/D at 4mA.
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