In this video, I go over how to trigger a Canon s95 camera through an rc transmitter, without taping a servo on top to push the shutter button. Canon cameras use a firmware hack called CHDK that allows shutter control through the usb port. With a simple switch from Turnigy, we can trigger the camera from the transmitter.
Turnigy switch: http://hobbyking.com/hobbyking/store/__8833__Turnigy_Receiver_Controlled_Switch_.html
Canon CHDK download and info: http://chdk.wikia.com/wiki/CHDK
Comments
Matt-
Can you draw up a wiring diagram of how you made your trigger? This looks like the most promising method, but I'm not entirely sure how you did it. I don't want to fry any of my equipment so a schematic would be awesome!
I don't think you can do that, as it has to be in a state of readiness to recognize the 5v trigger and do the requested command. I could be wrong though. Best thing to do is take a look over at the CHDK website and see if that can be a usb command.
Matt,
Is there a way to turn on a canon camera via chdk? I mean with all the dust circulating around at take off, camera should be off, when in the air, I want to turn it on, then after that use your instruction to take images, when about to land, use chdk to turn off camera. Thanks.
Correct. The CHDK is an an alternative to a manual servo for Canon cameras with no infrared sensor or remote trigger input.
Another great company that sells trigger is http://blip.com.au/
I use a blipswitch on my Canon 50D DSLR.
Great tutorial, but if you dont have a CDHK compatible camera you can use an IR cam shutter controller.
Yes.
5v can come from wherever you can get it. I chose a spare receiver port as I was building the harness, but you can eliminate the need to plug it into a spare channel by using a y-harness and plugging both leads into it, effectively using only one rx channel.
Or, just solder the positive and negative leads to the switch's servo lead.
There a number of ways to do it; the way I did it is by no means the only way.
Matt
Morli.
to reply to #3. YES.
I could have easily done this with 1 channel and powered the switch and given the camera 5v from the same pins on one channel. However, since I have spare channels just sitting there, I opted to do it this way.
It would be great if it did work on other brands, but Nomen est omen. Canon Hack Development Kit.
I myself use this but with Stereo Data Maker, which is nicer in use.
CHDK does not work for other brands. I would love to see a link to prove otherwise.