Here is a great little project by Kevin Kadooka if you are starting out on photography and have good Arduino understanding, or if you are starting out on Arduino and have a solid understanding of photography :)
This solenoid based single leaf shutter is controlled by Arduino and can expose a sensor or film for anywhere between 1/125 to infinity at the press of a button. The exposure duration is controlled via a small potentiometer.
While this prototype which is housed in an Arduino Uno board is quite large, it can be shrunken down quite a bit using a Trinket or an Arduino Micro, which would make it perfect for pinhole cameras.
P.S. Kevin is the brains behind the wonderful DUO TLR which we featured way back.
[Single-leaf Shutter (SLS) Prototype | Kevin Kadooka via Hackaday]
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