3
Operation
The power “switch” is actually a jumper on a header
connector. Remove the jumper from the left two posts
and place it on the right two posts to turn power ON.
A short momentary press of the button will change the
scale. A long button press will reset the lap counter.
If readings don’t look realistic, try moving sensor off cen-
ter of the rails, while keeping it perpendicular to the rails.
You may also have to reposition for different equipment
tripping the sensor.
Specifications
Mechanical
Size of Box: 3.0” X 3.2” X 1.7”H.
3D printed PETG enclosure with snap on cover.
Size of Display: 1.0” X 0.6”
Wiring: Ribbon cable between speed sensor and
control box. Approximately 7” long.
Size of Sensor: 2.8” X 1.3” X 0.6”. For use with large scale (45mm)
track.
Electrical
Power from internal 9V battery (not included)
Battery life: 4 hours rechargeable NiMH (200mah)
10 hours Alkaline (500mah)
Sensor optical IR reflective
Environmental
If using outdoors,
the control box
and sensor are
intended for tem-
porary use during
operating ses-
sions only.
The Speed Trap
is not weather
proof and should
be stored in-
doors.
