correct voltage read?
The ADC Pi is an Analogue to Digital converter for the Raspberry Pi
12/08/2019
Posted by:
kristian
Hi,
I got my ADC Pi to work last week. It worked fine; Connected it to a 1.5V battery and it read the voltage correctly.
Today it suddenly reads 5.060569390625V when connecting to the same battery.
In the mean time, I have connected it to another source of some 15V.
Does the ADC Pi need a calibration?
regards,
Kristian
I got my ADC Pi to work last week. It worked fine; Connected it to a 1.5V battery and it read the voltage correctly.
Today it suddenly reads 5.060569390625V when connecting to the same battery.
In the mean time, I have connected it to another source of some 15V.
Does the ADC Pi need a calibration?
regards,
Kristian
12/08/2019
Posted by:
andrew
Hello Kristian
The ADC Pi has a maximum input voltage of 5.06V so connecting it to a 15V source may have damaged the ADC chip making it read any voltage as its maximum value.
Does it read the same voltage on all 8 channels? If you only applied 15V to one of the channels then the damage may be contained to one ADC in which case the four channels connected to the other ADC should still work.
The ADC Pi has a maximum input voltage of 5.06V so connecting it to a 15V source may have damaged the ADC chip making it read any voltage as its maximum value.
Does it read the same voltage on all 8 channels? If you only applied 15V to one of the channels then the damage may be contained to one ADC in which case the four channels connected to the other ADC should still work.
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