When you like the convenience of iPhone pics but crave the sentimentality of a film photo, there’s only one thing to do — ...

[Fraens] recommends replacing the standard camera app on the phone with Open Camera ... The LDR is placed inside the bed of the resin printer — an Anycubic Photon in this case — where light ...

the second video below walks you through all the steps needed to add a touchscreen using an old Android phone. With a 3D printed bracket, the whole thing is a nicely complete printer control solution.