Which clock is this on? (This helps me know the resistor number - but all the clocks have the same circuitry around the LDR).
Please check that you have the 10k resistor installed, which forms the other part of the potential divider. There is also a setting in software to ignore the LDR, please also make sure that this is off.
If you tell me the clock type, I can be more specific.
Which model of clock do you have? Do you literally mean you have the Arduino model (shield for an UNO) or is it one of the others (Classic, All In One, etc.)?
First thing, are you sure you have LDR Dimming enabled? This is Parameter 9 if you are using the button, or "Use LDR" radio buttons if you are using the WiFi interface.
You could check the signal from the photoresistor by reading the voltage ADC-1 is seeing. ADC-1 is Pin 24 of the Atmega chip, or A1 on the Analog header of an UNO. Does the voltage vary when you vary the light on the photoresistor? It should. Lower voltage for brighter light, higher voltage for dimmer light.
Look into it later when the dust is clearing off the crater.
It is the Arduino All-in-One. And yes, for some dumb reason I forgot to mount the 10k on R17!. Followed your video tutorial, and it's not there, but it is in the instructions. Thank you so much for the quick response, works like a charm now
It was enabled. I have a All-in-One arduino model. My dumb ass just forgot to mount the 10k resistor, as I followed ian's youtube videos, and didn't also check the instruction manual carefully (in the video, he skips mounting the 10k)