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instruite said:Hi,
In our applications (designs for automotive) we use small shunt resistors for measuring the current through solenoids/motors which are controlled by our control units.
We put a very low value (.1ohm) resistor in series at the return line from the solenoid and then use some signal conditionaing circuit and feed the voltage to the microcontroller and thus we know exactly how much current is flowing through the load.
All such solenoids/motors are normally current controlled loads so current sensing is important in our case.
You have it right. But you would probably connect pin 1 to another resistor if you're also using that channel.Just trying to understand. Suppose my motor is connect using an H-bridge driver (L298N). This chip has current sensing pins, 1 and 15 for two channels. So, is it enough to connect a resistor - I'm using a .5 ohm , 12W resistor - to pin 15 and ground, and measure the voltage across this resistance?
Thanks
Good Morning Mr. David
I have question about the connections of differntial amplifiers across small resistor to detect the current that flows through the wire. I really thank you what you do to help me aout.