I am completely new to microcontroller in general and I am following along the kitronik discovery booklet. I have the circuit below built on my breadboard. When I run this circuit on wokwi.com it lights the LED as expected though on my actual breadboard it does not - see codes and screenshots below.

Any help would be very appreciated

import machine

LED = machine.Pin("LED",machine.Pin.OUT)
BUTTON = machine.Pin(0,machine.Pin.IN,machine.Pin.PULL_DOWN)

while True:

actual breadboard enter image description here

wokwi.com diagram enter image description here

2 Answers 2


It looks as thought your header pins are not soldered onto the Pico.

You will not get good contact unless you solder the header pins to the pico.

  • It is a contact issue, indeed. Wiggling it around, I can have it work (turn on and off). Thank you for the help
    – Teddy
    Dec 9, 2023 at 13:59
  • Incredible... really.
    – Seamus
    Dec 9, 2023 at 19:05

If the header is not really soldered with the pico board, please solder the header and place it on a breadboard like this:


If the problem is not gone, please test the continuities of your jumper wires too. You can also cross-check your code with this one:


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