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  • Build your Own Bat Detector with Analog Parts -- Episode 578

    This video will show you how to build a bat detector. The bat detector works as a heterodyne receiver that can shift frequencies in the ultrasonic range to range the humans can hear. Using an ultrasonic microphone, you can tune the device to the frequency…
  • An Ultrasonic Range Finder Using an SRF05 and an ATTiny85

    An ultrasonic range finder is a useful tool in a variety of real-life and robotic applications, such as in obstacle avoidance and distance measurement systems. The ultrasonic range finder measures the distance by emitting a 40KHz pulse of ultrasonic sound…
  • Underwater Ultrasonic Sensor

    Hi, there are a lot of ultrasonic sensors that I found to be waterproofed. But how to know if they work underwater? Can anyone suggest me some sensors that can measure distance in water (for depth around few metres)? Thanks.
  • HC-SR04 ultrasonic sensor interface Arduino

    Does HC-SR04 ultrasonic sensor cause harmful effects, when exposed towards human beings ??