Output goes low when it detects a 40KHz ultrasonic wave

• Ideal for collision detection on buggies and vehicles
• Range up to 0.5 metres
• Detects movement and changes in signal.

Supply voltage: 4.5 to 15 volts

NOTES

• The output is active low and illuminates the LED.
• LED illuminates when a change in the ultrasonic signal is detected

CALIBRATION:
The ultrasonic microphone has a certain frequency around 40KHz it works best at. To find this place the transmitter and reciever parallel to each other pointing to an open space. Wave a hand or flat obect in front to reflect the sound waves, while tuning the transmitter frequency until the LED flashes at the furthest distance.