okay, nevermind the previous question. what if i place the ultrasonic range meter flat on the ground(floor)? will the ultrasonic module detect the floor?
i tried to make one but there are some components of the circuit that are not available in our place. availability of the materials is really one of the biggest problems that i'm facing right now.
yeah, i only know one though (penoy_balut). i don't have the list of the parts yet, maybe later. actually, there is an rs components shop in the philippines but its only in manila and i'm not from there.
anyway, i got another question. considering the two ultrasonic range meter prototypes facing each other, when a wave is transmitted from one of the prototype and the receiver from the other prototype sensed it, will it still produce a reflection?
Depends what you mean by a 'reflection', the second receiver will consider the incoming wave as a reflection from it's own transmission, and give a false reading.
Depends what you mean by a 'reflection', the second receiver will consider the incoming wave as a reflection from it's own transmission, and give a false reading.
i mean the echo. but can you still compute the time of arrival if a transmitter and a receiver faces each other with different microcontrollers? you can't right?
Ranging is done using pulses, one transmitter sends out a short pulse, and the receiver times the echo coming back. As long as another transmitter doesn't transmit while the receiver is waiting for it's own echo, then there would be no problem.
i got another question. in timing the reflecting echo, is there a limit in the distance between the ultrasonic transmitter and receiver? and should it be parallel to each other?
Obviously if they are close together, and parallel, a pulse bouncing directly back will have the best chance of hitting the receiver. Uusally they are set about an inch apart or so, you don't want them too close as the transmitted pulse may overload the receiver.
Obviously if they are close together, and parallel, a pulse bouncing directly back will have the best chance of hitting the receiver. Uusally they are set about an inch apart or so, you don't want them too close as the transmitted pulse may overload the receiver.