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How do I make an electronic circuit for 300hz frequency

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ctnur

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i was given a task to produce a device that able to produce sound range of (200hz-300hz) with an the amplitude of( 0 - -15dB). i was advised to make my own electronic circuit since the amplitude is too small. i was bump coz i have little knowledge in electronic. Any suggestion would be nice
 

Hi,

Not much information. Please provide all necessary informations at once, not piece by piece.

What waveform?
Fixed frequency? adjustable?

Amplitude: 0....-15db is a relative value. It means the same as 100% ... 17.8%.
Or do you mean "sound power level"?

Something else we should know? Power supply? Portable? Quality?

For me it sounds that a MP3 player and a 200Hz_MP3_file is all you need.

Klaus
 
Hi,

If this is what you are thinking of, then you could make the classic 555 wailing siren circuit, using a speaker or a buzzer, the output capacitor has an effect on volume. There are plenty of web pages that show this circuit, and it's a simple, easy beginner circuit.

You can do it with BJT transistors as well, but the 555 is maybe a more documented version.

Not my speciality: Look into how to convert voltage to dB, this may be of assistance in understanding what you have to do.

This persons thread may also be of general interest:

https://www.edaboard.com/threads/359962/#post1541461

Wailing Siren is here, too:

https://www.555-timer-circuits.com/


This is a better choice that the wailing one on 555-timer-circuits:

https://www.555-timer-circuits.com/police-siren.html

Or this one (never tried it, I assume it works as they have a video):

https://startingelectronics.org/beginners/start-electronics-now/tut13-555-wailing-siren/
 

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