pic to pic ir link versus wired link : help please anyone

[mister_e]

If you don't modulate it, you may have range & noise problem. Common use those IR-Demodulator so far. Just keep it and that's it. Open most Audio equipment... what's inside OOOOH surprise, a IR-Demod module

[xnihilo]

If you don't modulate it, you may have range & noise problem. Common use those IR-Demodulator so far. Just keep it and that's it. Open most Audio equipment... what's inside OOOOH surprise, a IR-Demod module

My projet is a lasergame equipment with a "gun module", a "body module" and a "supplier" module that gives magazines/ammo and medics.

Yes, I understand the fact that it has to be modulated when using an IR link. My problem is that I have to use a wired link instead. Sender pic is used in a "supplier module" that provides a medic to a player 'body module' with its own pic. If the Medic supplier user wants to cheat, he can ask multiple players to stand in front of the IR led so they all get the medic kit (because of the spread and range of the ir beam). It has to be a pic to pic link.