Raspberry Pi Pico potentiometer on ADC0 and PWM LED on GP15 A potentiometer uses 3.3 volts and ground with its wiper connected to GP26 ADC0. GP15 drives an ordinary red LED through a 220-ohm resistor. BOOTSEL VBUS VSYS GND 3V3_EN 3V3 ADC_VREF 28 AGND 27 26 RUN 22 GND 21 20 19 18 GND 17 16 0 1 GND 2 3 4 5 GND 6 7 8 9 GND 10 11 12 13 GND 14 15 A long K short 3V3 WIPER GND Potentiometer and PWM LED · ADC0 to brightness Exact physical circuit for code/day-2/02_potentiometer_led.py 3.3 V GP26 / ADC0 GP15 PWM GND + − 3.3 V unused a b c d e CENTRE CHANNEL f g h i j − + GND 3.3 V 220 Ω GP26 / ADC0 · physical pin 31 GP15 PWM · physical pin 20 Before connecting USB ✓ Potentiometer outer pins use only 3.3 V and GND; centre wiper goes to GP26. ✓ GP15 reaches the LED through 220 Ω; LED polarity is A toward resistor, K toward GND. ✓ Both 3.3 V rails are visibly linked and sourced from pin 36. ✓ One contact per visible hole; partner checks while USB is disconnected.
Original course artwork informed by the official Freenove Potentiometer & LED lesson. It matches code/day-2/02_potentiometer_led.py: ADC0 reads the wiper and GP15 supplies PWM through the required LED resistor.

Exact connection list

FromThroughTo
Pico 3V3(OUT), physical pin 36top 3.3 V rail and right-side bridge to bottom 3.3 V railpotentiometer 3V3 outer pin
potentiometer centre wiperblue analogue-input jumperPico GP26 / ADC0, physical pin 31
potentiometer GND outer pinbottom GND railPico GND, physical pin 13
Pico GP15, physical pin 20green PWM jumper and 220 Ω resistorLED long anode; short cathode returns to bottom GND rail