
I have an L5 infrared remote http://www.l5remote.com/ for my iPhone, and set up a new remote on it for my shooter bot. It was able to learn the Lego's TX signals no problem (at least on the 2 channels I was using), and I quickly made a screen to control the bots aim, and a dedicated fire button. I think the L5 unit normally sells for around $40, but I found it on sale a few weeks ago for $20. If you have one, or see one on sale, it's a quick and cool way to set up an infrared remote for your Lego's.