Piezoelectric Transducer Driver Circuit With Adjustable Output Level - Electronic Circuits Projects Diagrams Free

romosco · 14th June 2007, 08:02 PM

Can any one help with a circuit for a PIEZOELECTRIC TRANSDUCER DRIVER CIRCUIT WITH ADJUSTABLE OUTPUT LEVEL

Thank you
Roger

audioguru · 14th June 2007, 11:36 PM

You forgot to say what the piezo transducer is for. A tweeter in a sound sytem? A high pitched alarm like a smoke detector?

The circuit for the driver depends on the transducer's spec's and on the supply voltage. It should be an audio amplifier if the transducer is a tweeter. Adjust its output level with a volume control at the input of its driver circuit.
The driver circuit should be a square-wave transistor bridge if the transducer is an alarm. Adjust the output level by changing the supply voltage of the driver circuit.

fasterstill · 16th June 2007, 02:45 PM

looking for something similar,
up to 30v from 12v power sourse to drive piezo. No need for quality as it for an alarm/security system. Frequency range 15-38khz, only one frequency need at a time but the ability to tune to anywhere in between.

Any takers

audioguru · 16th June 2007, 03:12 PM

Can anybody hear an alarm at an ultrasonic frequency except dogs?
Look at the frequency response of an ultrasonic piezo transducer. It is all over the place. Some frequencies where it resonates are extremely loud and many nearby frequencies are quiet.

Use a bridged amplifier to effectively double the operating voltage. Tune it for more than double the supply voltage.

Hero999 · 17th June 2007, 08:28 PM

I think he probably means 1.5kHz to 3.8kHz.

What's wrong with a burglar alarm siren from a DIY store?

wjgregg · 30th June 2007, 02:34 PM

Romosco, what frequency range? I'm working with disks from 500KHz to 1.6 MHz.

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14th June 2007, 08:02 PM	(permalink)
romosco	Piezoelectric Transducer Driver Circuit With Adjustable Output Level Can any one help with a circuit for a PIEZOELECTRIC TRANSDUCER DRIVER CIRCUIT WITH ADJUSTABLE OUTPUT LEVEL Thank you Roger

14th June 2007, 11:36 PM	(permalink)
audioguru	You forgot to say what the piezo transducer is for. A tweeter in a sound sytem? A high pitched alarm like a smoke detector? The circuit for the driver depends on the transducer's spec's and on the supply voltage. It should be an audio amplifier if the transducer is a tweeter. Adjust its output level with a volume control at the input of its driver circuit. The driver circuit should be a square-wave transistor bridge if the transducer is an alarm. Adjust the output level by changing the supply voltage of the driver circuit. __________________ Uncle $crooge

16th June 2007, 02:45 PM	(permalink)
fasterstill	looking for something similar, up to 30v from 12v power sourse to drive piezo. No need for quality as it for an alarm/security system. Frequency range 15-38khz, only one frequency need at a time but the ability to tune to anywhere in between. Any takers

16th June 2007, 03:12 PM	(permalink)
audioguru	Can anybody hear an alarm at an ultrasonic frequency except dogs? Look at the frequency response of an ultrasonic piezo transducer. It is all over the place. Some frequencies where it resonates are extremely loud and many nearby frequencies are quiet. Use a bridged amplifier to effectively double the operating voltage. Tune it for more than double the supply voltage. __________________ Uncle $crooge

17th June 2007, 08:28 PM	(permalink)
Hero999	I think he probably means 1.5kHz to 3.8kHz. What's wrong with a burglar alarm siren from a DIY store? __________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez And http://www.silicontronics.com, same screen name as here.

30th June 2007, 02:34 PM	(permalink)
wjgregg	Romosco, what frequency range? I'm working with disks from 500KHz to 1.6 MHz.