We've developed a PIC based sensor, that
is it uses a small number of hardware components e.g. LED's, resistors etc. but
the clever stuff like detecting an incoming Laser Tag infra red signal,
processing it, generating sounds, counting and display how many lives are left
etc. is all done in the software on the PIC.
Starsensor (without Y-Rig)
on the left, Fiat Lux! Sensor (with Y-Rig) on the right:

Here's some key features about our PIC
sensor:
* PIC based - easy to update for any
future features
* Low current consumption - battery
should last about 10 x longer than in Starsensor
* Fully WoW compatible
* LED in front head unit for night games
if required (switchable)
* Earpiece socket
* Manual life countdown - don't have to
shoot yourself to set hits
* Hit illuminate button - don't give your
position away by showing lights
* Uses PP3 battery - alkaline, or NiCad
or NiMH
* Sprung battery contacts - doesn't use
delicate battery clip
* Main unit smaller than Starsensor -
fits in pocket (100mm x 60mm x 25mm)
* Belt/pocket clip
* Insensitive to RF coming off gun
circuit - less false hits/accidently shooting yourself
* Inexpensive
Full details:
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