DIY Camera Shutter Timer Based on Arduino Nano

This is an overview of my new Arduino based Camera Shutter timer. Originally inspired by the cameradactyl project on YouTube this is my translation of that concept demonstrator into a workshop tool. The timer uses a laser to sense the opening and closing of the Analog camera shutter and provide details of the time including statistics such as the average and standard deviation on the LCD panel, the test results are logged to the SD card. The software automatically guesses the shutter speed being tested and shows the error from the expected time. This design is a stand alone device that can be run on a power bank or small PSU as well as attached to a PC. Safety was an important part of this design and the laser can be switched on an off with an over-ride switch. Laser light is dangerous to eyesight and lasers must be used with care. I also painted the inside of the housing black to reduce reflections. All of the code is available on github (https://github.com/ianonahillroad/Cam...) . The wiring diagram is shown at the end of the video. Latest code version Oct 2022 is on Git now has no test limit and better laser switch handling. Basic Hardware test also provided on Git.