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[go to Toth
Electronics catalog page]
The Scale Speedometer is designed to measure the
scale speed of a model train either HO or N Gauge in MPH or KPH.
Great accuracy is achieved through the use of quartz crystal timing
and a microprocessor for performing the calculations.
unit has built-in sensors so no installation is required, the speedometer
is simply placed over the tracks so the train will pass between
the box and the reflector. When the train breaks the first beam
the unit begins counting. After the second sensor detects the train's
passage the microprocessor calculates and then displays the scale
speed. The speed is displayed for 7 seconds then if the train and
cars are clear of the speedometer the unit will automatically reset
and wait for the next train. If the train has not passed through
in 7 seconds the speedometer monitors the trains passage and will
not reset until the last car has passed by.
The speedometer has a very wide range reading as
low as .3 MPH up to over 900 MPH. The accuracy is better than .25
% at 50 MPH.
The speedometer is powered by a 9 V battery
making it portable.
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