What are some examples of photoelectric effect?
When light shines on a cathode plate, the emitted electrons from the plate hit the anode and create a current. A solar panel is created from linking these together.
Source, with a few more examples.
Also, there was a case where raspberry pis, which are very small computers often used by hobbyists, would shut down when someone took a picture of it. It turns out that the camera flashes were causing a photoelectric effect on one of the chips, causing the computer to malfunction.