AVR Anolog to Digital Conversion Errors

HEllo thanks for your question !

In order to use internal ADC you must give the reference voltage to the microcontroller . Connect your AVCC to reference voltage(5 volt generally ) and AREF pin to Ground . So that internal ADC of microcontroller take suitable reference . I have made a nice tutorial for you related to how to use ADC of microcontroller in Atmega32 microcontroller please visit this reference link https:www.electronify.org

Thank you :clap: :dance: :clap: :dance: