Hi all,
This is Mohan,
Actually i tried to measure input current of smps(3 phase input), to make smps automation circuit,we have used a 1 ohm resistor to the the series of all the three phases of smps ,normally when i measure in multimeter i saw 40mA at the smps input when i measure(voltage) across the 1 ohm resistor i got 0.04v so when i use formula I=V/R,im getting 40mA but i need to interface it with micro controller .
Can anyone please suggest me a AC amplifier circuit ,with isolation .
Please find the image to know my measurement place
This is Mohan,
Actually i tried to measure input current of smps(3 phase input), to make smps automation circuit,we have used a 1 ohm resistor to the the series of all the three phases of smps ,normally when i measure in multimeter i saw 40mA at the smps input when i measure(voltage) across the 1 ohm resistor i got 0.04v so when i use formula I=V/R,im getting 40mA but i need to interface it with micro controller .
Can anyone please suggest me a AC amplifier circuit ,with isolation .
Please find the image to know my measurement place
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