Arduino nano 33 IOT unstable potenziometer

[alfredolo72]

Hi, i am making a little stream deck. I use 3 potenziometer 10K linear. Arduino nano 33 IOT - connected beetween 3.3v and gnd. The exist value of potenziometer are very unstable. I tried both USBMIDI_Interface and HairlessMIDI_Interface to see any difference. I have not problems if i connect my little stream deck to arduino uno. It works perfect. Arduino uno - connected beetween 5v and gnd. Any idea ?

[Veroledez]

Si tienes un multimetro prueba midiendo el voltaje entre 3.3v y gnd, y conecta los potenciometros, si hay variacion de voltaje usa otro regulador de 3.3v para los potenciometros gnd comun entre el arduino el nuevo regulador

[tttapa]

Do you see the same issues using the AnalogReadSerial Arduino example? (You can use the Serial Plotter in the IDE to test this.)

This is most likely a hardware problem.

[alfredolo72]

Thanks for reply. There is a hardware issue on nano. https://forum.arduino.cc/t/extreme-noisy-board-voltage-3-3v-on-nano-33-iot/623016 There is a lot of noise. Here is some result reading with Serial.println(potentiometer1.getRawValue()); 776 804 772 676 804 748 756 756 736 816 792 772 768 760

And here is the same code with Arduino uno and the same potenziometer. 704 704 704 720 704 704 720 704 704 720 720 720 704 704 704 720 720 704

I will send it back and i will get a different board. Thank you all and dont buy it...

[Veroledez]

Prueba a poner un capacitor de 1uf o menos, un pin a gnd y el otro pin del capacitor al pin analogico

[alfredolo72]

I tried it. Dont work, there is no difference with or without capacitor

[Veroledez]

Es problema del regulador, usa uno lineal de 3.3v y prueba nuevamente

[alfredolo72]

Thanks for reply. I dont like idea to buy a defective product and add extra hardware to fix it. I sended it back and buyed teensy 4.1 . I have just to wait few days. Thank you