In this video I show how you can build a shutter speed tester using a raspberry pi pico microcontroller and a photoresistor. It's a helping hand for gauging the accuracy of your shutter speeds. It is not suitable for use where highly accurate measurements are required, but as a guide it works well.

Full disclaimer, I'm not a great coder or electronics wiz. I built the code in ChatGPT, and went through several revisions and testing cycles to get to the code I'm sharing below.

https://docs.google.com/document/d/e/...