I am currently working on a Laser "Tag" project. Everything is going well, except for the trasmitter. The gun currently outputs a binary signal identifying the sender, sent in about a quarter of a second. I would like to use a laser pointer for the actual laser, as it has a tight beam with a great distance. Unfortunatly, I can't design the sensor to accept ONLY the laser pointer's light; it gets flooded by ambient light. A red filter woudn't do, as sunlight would make the unit hand dur to the way i've programmed it. As the unit would be used primarily at night, this is a viable option, but i'd rather have a better fix. I also had the idea of using IR leds - as some of the commercial sets do - but these have a limited range and a wide beam, even after the use of lenses.
Does anyone have any ideas on how to solve this problem?