High frequency signal for ultrasonic transducer from Arduino
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- Опубликовано: 15 сен 2020
- Your Arduino not only makes cute sounds with a buzzer, but it is fully capable of producing driving signals for ultrasonic transducers. In this video from LearnPiezo, I show how an Arduino can output a 1MHz square wave with no extra circuitry. I also show the practical usage of a 40kHz signal.
Here are the supplies:
Arduino nano
Picoscope 2405A
Oscilloscope probe (1x), breadboard, and jumper wires
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You're doing a real public service with these videos. I've not seen any others that get into the details the way you do. Bravo.
Me too , Bravo Thank you
@@H2ON_MEA Thanks!
Thanks so much!
Super good instructive video! I've been searching for this information on the internet for a long time. Thanks much for making this video.
You are welcome!
Thank you!
Thanks for the comment!
The 8 bit processor used in Arduino allow you to toggle the PORTx bits by writing a 1 to their corresponding PINx bits. This is The fastest way, apart from using the hardware timers, to get a square wave. You can increase the period, which will be 50% by adding nops in the loop as you did. Of course you processor won’t be doing anything else while this is going on unless interrupts get in there so you may as well use the hardware timers for frequency generation. This is when you realize that the Arduino libraries are getting in your way.
Yup, at some point you will need to more fundamental embedded development than just arduino
6:20 60khz limit if you go higher will emit a lower value because tone function expects INT 16-bit (2-byte) -32,768 to 32,767 so you overflow the maximum integer value
Thanks for sharing your knowledge in this area! Very important note!
Bravo Thank you
It is the best video for (arduino frequency generator)
Thanks so much!
That's really super.
Thanks!
@ Ultrasonic Advisors Interesting but I am interested in converting the ultrasonic signal into a recordable sound. You know when some of your neighbors talk (in turn about their neighbors for years?) with an ulsonic suppressor acting as a voice suppressor. I sense their "vibrations" and understand what they would like to tell me in person but they have to behave in this incomprehensible way without any plausible reason. I remain waiting for more info. Thank you very much.
Good instruction! However, is it possible to control multiple transducers at once? We currently have an 8x8 array and where wondering what method would suit best. Kind regards
For a project of mine, i need to create high frequency soundwaves through a transducer. My main problem is that I dont have any idea how to accurate supply my transducer with these high frequency signals and still know what frequency I am providing to it. Basically I want to supply frequency range from 1.6MHz to 2.5MHz in steps of 0.1MHz. Is there any way to know beforehand what kind of frequency I am supplying?
I can get to 4.05MHz(Max) and I want to accurately delay this to the range of 1.6MHz to 2.5MHz, how to do that?
Is the microcontroller a pic? I saw assembly instructions that look familiar.
It is an arduino nano
if i put this ultrasonic sensor on my forearm with same arduino/code setup as in video and i close my finger it will detect the muscle contraction of closing my finger?
I follow your channel from a week , very educational content,pezio is really hard to tune for me, please make a video on working circuit of 1 mhz pezio disc & how to match impedance for max output ???
@@ultrasonicadvisors waiting for your new video ..... keep it up 👍
@@Sandeep-li2mn This is a good question. I'll work on this!
I realize I'm kinda randomly asking but do anybody know of a good place to stream new series online?
@Dangelo Neil Flixportal
which transducer should we use for producing 40 khz ultrasound waves
can i directly run my "Ultrasonic Piezoelectric Humidifier Moisture Film Humidification 25mm" with this method ?
No, not directly because the Arduino cannot provide enough current. It can provide the carrier frequency, though.
hello sir i have seen your video and follow u since many days. i have one question can i use piezoelectric twitter which we use in sound box for ultrasonic frequency testing
Yes, they have a response in the ultrasonic range because there are many resonance modes.
you need an amplifier for 1MHz frequency transducer, otherwise the signal will be very weak.
Yes, as you increase frequency, the current also increases, in which case the arduino has a limited current output. Logic level mosfet can be used to switch a high current capacity supply
How can i drive a piezo tranducer with arduino. I would need upto 50 watts to get a good amplitude ? at about 20KHz to 25 KHZ. Basically i want a powerful ultrasonic sound to be emmitted.
I would implement a half or full bridge driver. The Arduino would control the gate of the MOSFET's.
How to receive or read 40khz from transceiver to receiver?
Use an amplifier+filter and a comparator to receive.
Hi thanks for your explanation. I have uno r3 board (16mhz) and Lgt8f328p board that running 32mhz. Is It possible to produce 60khz sound using tone command and piezo passive buzzer?
Yes, that's true.
@@ultrasonicadvisors I ithink the transducer produce more power sound than piezo .. , .I just tried it. thanks
@@TechnoWit3D Yes, buzzer will produce more sound than a bare crystal because a buzzer has bending action which transfers energy to the air better
@@ultrasonicadvisors thank you. Do you know how to produce more power to reach more cover area? How about put more than one transducer would do that?
@@TechnoWit3D yes, using more than 1 transducer is one method. Another is increasing the voltage or more accurately tracking the resonance frequency.
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