jumper1127 · Semo-Regulars
Comments
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I built the transmitter and receiver based on the circuit diagrams on ECELab.com. When the two were close to each other, they work properly. When I separated them two meters apart, the receiver could hardly pick up any signal. I checked the receiver's circuit, the connections were fine. But for some reason the second…
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That might be an easy way to produce ultrasound. Which speaker did you use? Was it able to broadcast ultrasound in a wide range?
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Thank you very much for your reply! The difficulty in my project is that there are multiple moving objects I need to detect on a field. I believe the ultrasonic tape and range finder can only measure distance between itself an object in front of it. I will only build one sonar to broadcast ultrasound to the receivers, but…
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We were thinking to separate the receiver from the emitter. The emitter sends a sound wave from one end and the receiver receives the signal at the other end. The starting time of the signal will be incorporated in the sound wave or sent by some other method to the receiver, which is able to compute the travel time of the…
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Thanks a lot for the great information! Actually I'm not trying to piss off my neighbor's dogs. I'm working in a team to build a position system for a bunch of robots. Our idea was to use four ultrasonic beacons which emits sound waves from four corners of a basketball court. The coverage is the entire court. The beacons…
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What is the range of the ultrasonic emitter? I hope to achieve a range of 80ft with detectable amplitude within the range. How should I modify the circuit in #4 to adjust the range? Change the battery or piezo? Thanks a lot!
