[ELI5] Why do digital clocks go absolutely nuts when you put your phone camera on them?

603 views

Feeling super stupid sorry for dumb question…

In: Technology

2 Answers

Anonymous 0 Comments

I think what you are seeing is what’s called multiplexing: the screens aren’t all lit up at once, the are lit up in sections one after the other in very fast succession, this makes it so you can make the control circuit smaller by reducing the number of segments it needs to drive

Your phone camera has a frame rate that likely won’t match the multiplexing frequency, this means that in every frame a different segment will be lit, so it looks all flashy

You are viewing 1 out of 2 answers, click here to view all answers.