Aug 9, 2016 #1 S satiz Member level 5 Joined Jun 9, 2013 Messages 87 Helped 3 Reputation 6 Reaction score 3 Trophy points 1,288 Activity points 1,999 Hi All, I am planning to measure AC load current using ACS718. The output of ACS718 is sine with 2.5 volt positive offset. My microcontroller ADC positive reference is 3.3V. I am facing difficulty in reading the ACS718 output using microcontroller. Please help me to solve this issue. My circuit is attached below OUTPUT
Hi All, I am planning to measure AC load current using ACS718. The output of ACS718 is sine with 2.5 volt positive offset. My microcontroller ADC positive reference is 3.3V. I am facing difficulty in reading the ACS718 output using microcontroller. Please help me to solve this issue. My circuit is attached below OUTPUT
Aug 9, 2016 #2 KlausST Advanced Member level 7 Joined Apr 17, 2014 Messages 25,278 Helped 4,873 Reputation 9,767 Reaction score 5,566 Trophy points 1,393 Activity points 169,228 Hi, Center voltage of the sensor is 2.5V Center voltage of ADC range is 3.3V/2 = 1.65V --> use a voltage divider: input 2.5V, output 1.65V. For sure the "current signal" is attenuated with the same factor. Klaus
Hi, Center voltage of the sensor is 2.5V Center voltage of ADC range is 3.3V/2 = 1.65V --> use a voltage divider: input 2.5V, output 1.65V. For sure the "current signal" is attenuated with the same factor. Klaus