On September 27, 2010 at 17:44, Daniel Tonks said...
Ensure you don't make it TOO strong. Some IR devices can be overloaded (ie. Scientific Atlanta cable boxes).
Most universal remotes have between 1 and 4 IR emitters. Sometimes there are a mix of narrow and wide focus ones. A couple remotes have actually put emitters on the front sides. Also, if you have a plastic shield over your emitters, ensure they are as close to the front and have a large enough field of vision so you don't suffer from "tunnel vision" which will reduce range.
Thanks for detailed information. I had planned 4 IR emitters originally and even made a prototype based on that. However I saw many low cost commercial remote controls in the market that were working with single IR emitter and so in the new design we decided to use only one. With few trials, it seems to work well once we pulse in much higher current of about 1.2 A or so. We tested it side by side with a commercial remote control and they perform nearly same.
