|easy to use|
|very accurate hardware-clock for precise timing (0.005 sec accuracy
/ 0.001 sec resolution)|
|easy to mount and connects to power from the car|
|flexible ID solution (store new ID into the transponders, no need to
exchange transponders if there is an ID conflict)|
|connects to standard PC via serial cable|
|standard track width 600mm, optional width
|"unlimited" (255) number of cars at the same time|
|small, lightweight transponders (only 3 g / 0.11 oz)|
|draws very little power from the car batteries (<10mA)|
|transponders inactive when not racing|
The transponder is extremely small and light weight. In addition, it only draws
about 10mA current, connected to a voltage source at anything from 4.5 to
6 V. Hence, it can be connected directly to the main batteries at the
The transponder is mounted inside the car. With components on only one side, it is very
easy to fasten to the car, using double-sided tape. It must be
mounted directly beneath the front window of the car, as it uses light to
communicate with the bridge.
At this picture, you might be able to spot the transponder through the
canopy window, due to the powerful light source directed to the window,
and some image processing.
However; normally, you cannot see the transponder from outside the car.
This makes the LapZ system esthetically beautiful, as no parts are
visible. It also means that the transponder is well protected, allowing it to
have a long lifetime.
The transponders send a unique ID to the bridge, identifying itself. This ID
(1-255) can easily be changed using the program that is shipped together
with LapZ system. No physical contact, soldering etc. is necessary, as the
programming is done while parking the car under the bridge. Hence, the system is very flexible and versatile, because
drivers don't have to switch transponders in order to obtain unique IDs. In
stead, one simply reprograms the transponders. Once you have programmed an ID
into the transponder, however, it remains there until you reprogram it again, - even
if you turn off the power. Hence, one transponder can have one unique ID all
its life. It's up to you.
The bridge contains several sensors connected through a flat cable.
Each sensor looks like this:
The standard system comprises six sensors, covering
a "normal" track. Optionally, you can use a system with 11 sensors,
covering a wider track.
The cable then connects to the LapZ controller card:
This card is connected to a computer via serial cable, making the
computer the user interface to the LapZ system.