Guru
Joined: 11/02/2018
Location: AustraliaPosts: 3321
| Posted: 10:31pm 27 Sep 2022 |
Ok now we know what is needed.
For accurate readings the resistors need to be pulled to ground with a low resistance. The Pico pins are about 50 ohms, so even if OC worked accuracy would be reduced.
Use 2N7000 or similar MOSFETS to pull them to ground. Invert your DOUTs as a high will pull the resistor low.