While many of us are content to take (pretty good) pictures with our cell phones, others prefer dedicated digital cameras, and a few use actual physical film. While film photography certainly still has its proponents, one obvious downside is that the format doesn’t automatically store your ISO, aperture, and shutter speed for later review.
At least that’s normally the case. As stated in this GitHub repository, Alessandro Genova created a tracking unit based on the Adafruit ItsyBitsy ATmega32u4 development board, which logs this rudimentary metadata. The device mounts to the hot shoe of a camera – such as the film-based Pentax camera pictured – and allows the user to enter the film brand and ISO for a roll, then to set the individual aperture setting and shutter speed for each shot via a pair of push-button encoders.
The device also includes a light measurement circuit made using a phototransistor. While not very accurate without calibration, it can be used in place of a (potentially dead) mechanical camera’s on-board counter in a pinch.
Once set up, taking a picture with the camera automatically saves the image data, producing digital notes for later review on its 128×64 OLED display. It looks like a pretty useful device, preserving the essence of film photography, while automating the (often overlooked) note-taking tasks. Information and building code are available through the project write-up if you want to build your own!