Hi, I am trying to make an adjustable pulse buzzer using the buzzer bellow.

https://www.jaycar.com.au/dual-sound-piezo-buzzer-1-13v/p/AB3456

What would I need to add to this buzzer (which is capable of 2 - 7 pulses per second) to be able to manually adjust the pulse rate?

Thanks

 

Welcome to AAC!
Without knowing the internal circuitry used to generate the pulses it's unlikely you will be able to add anything to adjust the pulse rate upwards; but an external circuit could be used to switch the buzzer on and off periodically, thus reducing the long-term average pulse rate (albeit inelegantly).

 

It is not clear in the ad whether the pulse rate is adjustable or not. It would be odd to have one with a fixed pulse rate that might be 2 or 7 pulses per second.

In any case, a simple 555 circuit could be used to turn the continuous tone into an adjustable pulsed tone.

Bob

 

The buzzer didn't mention that how to control the pulse rate, so only can assuming that it is control the voltage 1 - 13Vdc, so you can use 555 cmos type to build a pwm circuit with 12V and the output add a diode and capacitor to do the rectifier and filter job.

If the 555 output current is not enough for the buzzer the you can add one stage of BJT or MOSFET.