How can I build a circuit for an ultrasonic transducer?

For an amatour robot project, I needed to measure the difference of distances between 2 ultrasonic transducer and one receiver.

We(my and my teammates at that project) bought Ardunio Uno cards and HC-SR04 modules and made some "operation" on modules. We disabled one module's receiver and the other ones' transmitter; then connected both to the same ardunio, measured time difference between transmitted and received sound(no calibration problem on the test due we used the same ardunio for both) and calculated distance by..

However, the case is; the transmitters' transmitting "angle" was too narrow for our usage.

We tried some other paths, but they did not seem to work either(RSSI and we considered Cricket indoor localization), so I though about using whatever we have by different paths.

We were unable to use ultrasonic transcevirs due to angle case. So, I thought using a 40KHZ ultrasonic transmitter which has larger signal "angle" with our half-disabled HC-SR04s.

I am considering buying these http://www.farnell.com/datasheets/1847127.pdf?_ga=1.214659863.1035364629.1469821844 However, they are expensive for myself to buy( and I am unable to get financial help for this test), so I though buying some cheap ones to try first and further testing by these wide-angled ones when we buy them. Cheap ones I am considering to buy https://www.amazon.com/Pairs-Tct40-16r-Ultrasonic-Transducer-Sensor/dp/B00UKONMTM

I was about to buy them and try, but then I noticed that most similar ultrasonic transducers seems to have some minimum working voltages which are numbers with three digits(The one I am thinking to buy works with minimum 15 volts); so I just googled how to use ultrasonic transducers. They seems to need some special circuits with capacitors. For example: http://electronics.stackexchange.com/questions/93458/how-to-wire-up-ultrasonic-transducer http://electronics.stackexchange.com/questions/56/how-do-i-drive-an-ultrasonic-transducer-with-an-arduino

Everything is fine until now. The case is, I am pretty much no means of electronics, so I don't know how can I make these circuits. I cannot just copy these circuits either, I cannot be sure they will work with parts I wanna buy.

I am a mechanical engineering student, first grade. I did not get proper education to work with that electronic parts yet. I made HC-SR04, HC05 worked with Arduino Uno before.

I just need proper basics to build this circuit, any tips would be helpful. Thanks.. :)

In order for this post to make sense you have to start by posting the distance between the two modules and whether or not they were in the same plane (perpendicular to the same imaginary line) as well as post the code you ran.

I have one of those modules and used a sketch I found online to display the distance in cm on an LCD.

You have not posted your test procedure, your code or your data.

This:

However, the case is; the transmitters' transmitting "angle" was too narrow for our usage.

We tried some other paths, but they did not seem to work either(RSSI and we considered Cricket indoor localization), so I though about using whatever we have by different paths.

We were unable to use ultrasonic transcevirs due to angle case. So, I thought using a 40KHZ ultrasonic transmitter which has larger signal "angle" with our half-disabled HC-SR04s.

is ambiguous and virtually useless for troubleshooting purposes.

Draw you test setup with location and orientation of the modules. Post your code Post your data. Explain where you got whatever information you used to setup and run your test. Explain why you had a problem when anyone in the world can pick an UNO and an HC-SR04 module and have it running perfectly in 15 minutes/

I don't know what to make of this:

I am considering buying these http://www.farnell.com/datasheets/1847127.pdf?_ga=1.214659863.1035364629.1469821844 However, they are expensive for myself to buy( and I am unable to get financial help for this test), so I though buying some cheap ones to try first and further testing by these wide-angled ones when we buy them. Cheap ones I am considering to buy https://www.amazon.com/Pairs-Tct40-16r-Ultrasonic-Transducer-Sensor/dp/B00UKONMTM

I was about to buy them and try, but then I noticed that most similar ultrasonic transducers seems to have some minimum working voltages which are numbers with three digits(The one I am thinking to buy works with minimum 15 volts); so I just googled how to use ultrasonic transducers. They seems to need some special circuits with capacitors. For example: http://electronics.stackexchange.com/questions/93458/how-to-wire-up-ultrasonic-transducer http://electronics.stackexchange.com/questions/56/how-do-i-drive-an-ultrasonic-transducer-with-an-arduino

Everything is fine until now. The case is, I am pretty much no means of electronics, so I don't know how can I make these circuits. I cannot just copy these circuits either, I cannot be sure they will work with parts I wanna buy.

I am a mechanical engineering student, first grade. I did not get proper education to work with that electronic parts yet. I made HC-SR04, HC05 worked with Arduino Uno before.

What is the problem ?

See this thread a bit further down

‘Ultrasonic Waves’ started by bordeaux270993

I think we cover a lot of your queries.

regards

Allan.

all ultrasonic "speakers" are more or less directional. You can test a conical mirror for uniform spreading of sound waves in horizontal plane |500x373

You have not posted your test procedure, your code or your data.

or a map of your theater of operation (with dimensions in cm.

Post the following:

1- Map of robot operations theater
2- Test procedure
3- Test data
4- Code
5- Drawing of test setup with dimensions in cm

We lost the data so I am repeating the test to get an useful data now :/ I will post results and the problem with the data you want :)

Data is only one of the five items listed.