Digital Timer

The digital timer is surveys the time-gap one kind of precise digital measuring appliance,
is feeds specially the school physics teaching the demonstration performance
and the survey time and so on the experimental one kind of general instrument,
also available in the counting, measures the cycle, general and air cushion
guide rail necessary use.
The this aircraft besides the power source and the photoelectricity transformation,
uses the CMOS double row in-line type digital integrated circuit
to use the quartz crystal oscillator to take the time base signal, the time precision
is high; Uses the LED nixietube demonstration data, the reading is clear;
Uses two printed wiring board compact, the structure, the contact is good; Uses
the ABS engineering plastics engine case, the elegant appearance and has is advantageous
for merits and so on overhaul, debugging.