Designed to be used in an Infrared distance sensor, whereby the time it takes for an IR pulse to be transmitted and returned causes a small amount of delay between the pulse signal and the received signal. Using a 100KHz pulse signal and a maximum sense distance of 30cm, the maximum pulse delay is 20m%, which is then detected and amplified to produce an analog voltage that is dependent on distance.
time(s) = distance(m) / speed(m/s)
t = 0.6m / 3x10^8 m/s
(30cm both forward and back so total 60cm)
t = 2x10^-9 s
T(s) = 1 / f(Hz)
T = 1 / 1x10^5 Hz
T = 1x10^-5 s
% delay = (t / T) x 100
% delay = (2x10^-9 / 1x10^-5) x 100
% delay = 0.02% or 20m%
