Since most DSLR cameras now have an IR communication port, [Julius] thought it would be a good idea to build an IR shutter release remote. He has released the plans for two versions; a single sided hand etched one, and a double sided one to have made professionally. He notes that it should have a range of at least 10 meters thanks to the 100mAh Li-Po battery and a reasonably high power IR LED. You can download the source code as well as the etching mask and eagle files from the wiki page. He does note that you may have to change the pattern sent to match your camera.
If you’ve been keeping up with our featured stories this year you’ll remember the post about using your own eyelids as 3D shutter glasses. Throngs of commenters called this one as fake and they were right. But we still enjoyed the experience… it’s more fun to be trolled when the trolls are skilled and idea is original. The perpetrators have released a follow-up video that shows how it was done. It’s not just an electronic trinket and some acting. There’s well executed post-production which maps out the area around this gentleman’s eyes and edits in the rhythmic blinking that made the farce somewhat believable. Check it out after the break.
Apparently Pentax DSLR cameras have a remote shutter option that used infrared signals. [Pies for you] gathered up several different hacks and built a method of triggering the camera using custom audio. He put together the dongle above, just a headphone extension cord and two IR LEDs, which plugs into the headphone jack of any audio device like an iPod or an Android phone. When you play back a file the audio signals drive the IR LEDs. This is completely worthless unless you craft your own audio file using the correct frequency, duty cycle, and bit encoding. [Pies for you] did just that and got things up and running. Looks like the system doesn’t do so well with MP3 compression, but take a look at the waveform analysis that he posted and then make sure you’re using a lossless format.
It is easy to rely on the ratings marked on different tools, whether it is a power supply, scale, or speedometer. However calibration is essential for any part that is relied upon either professionally or for a hobby. [Jeremy] wanted to see if his Lomography camera shutter really was only open for 1/100ths of a second when set to that. In order to test his rig, he set up an LED on one side of the shutter, and a high speed phototransistor to gauge the time spent open, using an oscilloscope to measure the time the reference point was pulled low. In his case, when the camera was set to 1/100, the shutter was actually open for closer to 1/150th of a second (the mean was 1/148ths of a second, with a standard deviation of 417 uSecs). This difference can make a large difference in picture brightness.
Be sure to check his blog for more pictures of the setup, as well as some useful part references and circuit diagrams.
[Toby] wanted to have a remote shutter trigger for his RICOH GR III camera. This brand doesn’t have a dedicated port for remote operation but a bit of research allowed him to build his own trigger. The camera’s USB port is used for triggering but not using the USB protocol. Instead, a pulse pattern on the 5V line identifies the half-press, full-press, and release states of the shutter button. From there it was just a matter of wiring up a circuit centering around an Arduino that leaves room for a lot of expansion into realms like photo automation.
If you’re on the fence about 3D TV and related technologies [Anton B.] might be able to help you decide. No, he’s not going to shove pamphlets in your face and explain why its the wave of the future. Rather, by showing the hack-ability (its a word) of 3D shutter glasses. A simple bridge of wire across specific contacts can ‘trick’ the glasses into only displaying only the left or right picture.
Wouldn’t that make it just a regular 2D TV again? Yes, that’s the beauty of it. Person A could be watching a completely separate movie pr0n than person B, but all on the same TV. Or two people could be playing a video game, without dividing the screen in half. The only problem is the current lack of software that can interlace movies/games, who’s up for writing some C++ this weekend?
[Pablo] likes to buy and repair broken cameras. When he was in need of a way to test the shutter speed, his brother came up with a great idea. Harvest the photo transistor from an old ball mouse. It turned out to be just as easy as it sounds. He plugs the circuit into some sound editing software to get the signal. We think this is pretty slick.