DSLR Remote Control

Here is a link GVI Digital Remote Control to my Canon EOS 450D.
You can find there schematics and driver+sketch to build this remote.
If you have any hardware/software/ features suggestions please share them. Thank you

It works just like when you press the shutter release button. If you press it half way, it pre-focuses.

p.s. Canon makes an infrared one--but I find that the radio signal one (3rd party) works better (nothing to obstruct it).