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i gt a question with ultrasonic radar

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dummy55555

New Member
UltraSonic Radar

hi,,since this used as a detector but why is the both tranducer pointing at one side. but not pointing each other. it has a transmitter and receiver, right,,
anyone can please answer me..???

ermm.. i still have another question, the TR3 in the circuit did not show me which side is the emmiter. can anyone tell me..
thanks a lot...
 

Nigel Goodwin

Super Moderator
Most Helpful Member
UltraSonic Radar

hi,,since this used as a detector but why is the both tranducer pointing at one side. but not pointing each other. it has a transmitter and receiver, right,,
anyone can please answer me..???
Because that's how 'radar' works, it bounces a signal off the object.

ermm.. i still have another question, the TR3 in the circuit did not show me which side is the emmiter. can anyone tell me..
thanks a lot...
It's at the bottom, but (as usual for that site) the circuit is not only of very poor quality, it's not even drawn correctly (obvious mistake, C1).
 

audioguru

Well-Known Member
Most Helpful Member
The kit and project are not sonar (radar). It is a horrible translation.
It is a motion detector project.

The circuit detects the amplitude of nothing or of the reflection of the ultrasonic transmission that is received then it amplifies the AC caused by motion.
 
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