Home > Circuit Blox > Ultrasonic Detector
UPDATED:.21:14 23 August 2014
FUNCTION BLOCK
FUNCTION

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

CIRCUIT DETAILS
+Rx

-Rx
PCB LAYOUT

PCB size: 51mm x 25mm

Assembly Instructions

+V
Vout
0V

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.

APPLICATIONS:

  • Buggy collision detection
  • Doorway alarms
  • Object detection.
www.edutek.ltd.uk - Working Electronics For Students & Teachers