Motion Sensor Pinout
The Motion sensor measures the time between a pulse train of ultrasonic pulses and their echoes in order to determine the distance to objects. The pinouts of the motion sensor are as follows:
The yellow ring is normally at +5 VDC. To initiate a measurement, the yellow ring voltage drops to 0 V for 0.13 ms. At the falling edge of the input signal, the black ring (output signal) from the sensor drops from +5 VDC to 0 VDC. At the rising edge of the input signal, the transducer emits a square wave pulse train of 16 ultrasonic pulses at a sound frequency of about 49 kHz.
There is a dead time of about 0.85 ms, where the sensor will not detect an ultrasonic echo. When an echo is detected, the output signal rises from 0 VDC to +5 VDC.
Creation Date: 04/9/2008