Raspberry pi PICO ADC reading

RP2040 based microcontroller boards running MicroPython.
Target audience: MicroPython users with an RP2040 boards.
This does not include conventional Linux-based Raspberry Pi boards.
Post Reply
fransdiv
Posts: 2
Joined: Sat Apr 23, 2022 7:29 pm

Raspberry pi PICO ADC reading

Post by fransdiv » Sat Apr 23, 2022 7:35 pm

Why not get zero when taking ADC readings on Raspberry Pi Pico? Even though I ground the ADC pin, the analog reading always fluctuates between 10 to 20. How can analog reading be reduced to zero?
Top
davef
Posts: 811
Joined: Thu Apr 30, 2020 1:03 am
Location: Christchurch, NZ

Re: Raspberry pi PICO ADC reading

Post by davef » Sat Apr 23, 2022 8:14 pm

https://www.google.com/search?channel=f ... adc+errors
Choose "Understanding Data Converters" - Texas Instruments and go to Figure 3 and offset error.
Top
fransdiv
Posts: 2
Joined: Sat Apr 23, 2022 7:29 pm

Re: Raspberry pi PICO ADC reading

Post by fransdiv » Sun Apr 24, 2022 5:01 am

davef wrote: ↑
Sat Apr 23, 2022 8:14 pm
 https://www.google.com/search?channel=f ... adc+errors
Choose "Understanding Data Converters" - Texas Instruments and go to Figure 3 and offset error google play apk
well, thanks
Top
Post Reply

Return to “Raspberry Pi microcontroller boards”