YouTube user “balthamos89” wanted to snap pictures at defined intervals, but didn’t have an intervalometer handy. To make matters worse, software specifically coded to trigger the camera via a PC burned through his camera battery within 30 minutes.
“I needed something that would last days,” balthamos89 explained in a YouTube post. “So, my options were to buy an overpriced external power supply, or build something that can take photos that didn’t interface through USB. My camera doesn’t have support for a wired trigger, so IR was my only option.”
Balthamos89 said he thought it would be fun to strap in a microcontroller into pre-existing hardware, so he decided to gave it a try.
“I happened to have some AVR ATtiny25’s lying around, so I popped open the IR remote for the camera and poked around a bit. Though, I poked around a bit too much and ended up with a broken IR remote,” he continued.
“Determined, I ripped out the old chip and soldered a new switch. I had to add in code for handling the IR signaling, but I ended up with a functioning remote. Not only that, but it had intervalometer capabilities as well.”
Pretty cool, eh? If you want to try building your own version of the AVR ATtiny25-powered ShuttAVR be sure to check out the the relevant files on GitHub.