(17-05-2012 03:29 PM) Wrote:  We need a decoder box which recieves and sends signals at a determened frequency

The recieving bit is to pick up the transponders attatched to our buggies

The send bit is to program the transponders set up codes in each tag (transponder correct term but im lazy)

An areial /antenna is fed into the decoder box
What we want is a wire loop suspended above the track at start/finish line which picks up the tag signal as the buggy passes under the antenna
The wire antenna runs into a termination box and a coax cable is then run out the antenna box (cigarette packet size)to the decoder box

A laptop is then plugged into the decoder box software loaded and were all set
Software allows us to programe each tag with a buggy race number a name colour engine size anything we want really

Laps recorded by lap times number of laps and from ther can bring up fastest lap slowest lap etc of all buggies pushbikes mopeds whatever we put our tags on

The transponders
We need active transponders (Tags) that is they are battery powered
as these send out a continious signal

Now accuracy
they can time laps to 0.001 of a sec can detect 200 tags in 1 sec
That would be something to see 200 buggys crossing the line within 1 sec

Just looking at a basic 1 antenna system for us
A trap if ya like set up at the start /finish line

More elaborate setups have up to 8 or more antennas placed around the raceway to give split times = more set up time and cost we dont need that shit