Canon DSLR IR Remote (Modified)
This is a modification of kitlaan's IR Remote design (http://www.thingiverse.com/thing:9914). It provides room for a CR1220 battery holder, an Atmel ATttiny13a microcontroller, a 3mm IR LED, a small switch and a button.
Right now the button has some issues as it collides with the microcontroller. I'll fix this soon.
Details about the project: https://www.hackster.io/dbrgn/diy-canon-ir-remote-2793e1