Shutter controller for photographing bats using the HAMA CA-1 remote control
This is software for an Arduino contraption I made for a friend who is photographing bats.
It works as follows:
- a bat flies into the infrared-beam of a 3rd party photographic flash trigger system
- the flash fires, exposing the image of the bat onto a camera
- my contraption detects the flash using a kind of slave trigger photocell
- my contraption sends a wireless signal to the camera to end the exposure (and save the picture)
- my contraption sends a wireless signal to the camera to start a new exposure ("bulb mode")
- the cycle repeats, waiting for another bat to trigger a flash Additionally, every X seconds without any activity, a new exposure is started anyway.
The wireless signal is a 433 MHz AM modulated radio signal compatible with Hama CA-1 remote controls. The Arduino emulates the Hama CA-1 radio transmitter using a generic 433 MHz on-off module. The Hama CA-1 radio receiver is connected to the camera.