Hack a Canon external Flash for high-speed video marking
June 5, 2012 1:43 PM Subscribe
How can I hack a Canon external Flash for my high-speed video application?
posted by nickerbocker to Technology (5 answers total) 1 user marked this as a favorite
Hi! I have a few old external flashes for a Canon SLR camera. The one I have before me is a SunPak auto 433AF "Thyristor".
What I was hoping for was a simple shorting of some of the pins to cause the unit to flash... but that didn't get me anywhere.
My application isn't photography per-say. I'm going to be running a test that uses a high-speed video camera (at >1000fps) and need positive indication of certain events happening.
More specifically: I'm going to setup 2 flashes that are controlled by my computer software. The software will send a command to a solenoid valve to open. This signal should trigger the first flash. The solenoid valve will drive a pneumatic remote operated valve to begin to open and the encoder on the shaft will send feedback to the computer. Once the encoder registers >90deg rotation the second flash will occur. These two flashes will help in deciphering the rest of the information in the high speed video.
What kind of signal to what pins of this flash do I need to send to make it work? There is a "test" button that causes the flash. I need to use the pins from the hot shoe. Like...do I send a 5V square "ttl-style" trigger signal to a pin or something like that?
Thanks DIYers for your help :).