Boguslaw

Ok, thank you for informations. I will use 12bit

Your code works similarly to mine, i.e. wrong

I have one more problem with this PIC, it doesn't work #define AD_REF_SOURCE AD_REF_2048 always is enabled AD_REF_AVCC.

OK I will wait, below is my listing #CHIP 18F56Q71,64 #OPTION Explicit #startup InitPPS, 85 #define PPSToolPart 18F56Q71 Sub InitPPS // Module: UART pin directions Dir PORTB.1 Out ' Make TX2 pin an output // Module: UART2 RB1PPS = 0x0018 // TX2 > RB1 11000 End Sub Dir Porta.2 In'asc Dir Portc.7 out'led 'analogue port selection #define AdRefSource = AD_REF_AVCC #DEFINE ADCChannelSelected ANA2 #DEFINE ADSpeed highSpeed #define AD_Delay 4 10us dim pot1 as integer #define USART2_BAUD_RATE 9600 #define...

Word gives the numbers 65535 when the voltage is low

When I use integer variable to read AD10 , then I receive -500 to 1300 ADC, if I use AD 8bit, then is correct 0-255 , at reading AD12 I have 0-4095 ADC. It is certain that something is not working in AD10.

Still is not good, with AD_REF_AVCC and "true" at 3.3V is 1023, but in the vicinity of low voltages when the ADC reaches 0, continue turning the ADC potentiometer indicates above 65000. I use Curiosity nano, maybe is hardware problem...

Still is not good, with AD_REF_AVCC and "true" at 3.3V is 1023, but in the vicinity of low voltages when the ADC reaches 0, continue turning the ADC potentiometer indicates above 65000