PSoC™ 4 Forum Discussions

[Kinrin]

Dear friends,

I'm trying to build up a program to drive an e-toothbrush. I use 3.7V Li-Ion battery to be the power source.

but I found that the ADC value for battery voltage always be read out with different value even the voltage is same.

I heard that the ADC function must be calibrated when programming MCU in factory.

can any body tell me how to do the ADC calibration? and how we should modify program with this calibration?

many thanks!

[LinglingG_46]

1: Could you give me  a screenshot about  your test result about the ADC? 

2: How about the results of the external constant voltage source test？

3: Calibration means that you use the known voltage to get the Gain, and test the GND value as the offset. So you can get a new calibration value.