Reuest : Ultrasonic Dog Whistle... Circuit

[macxom]

ultrasonic dog whistle circuit

thank

 

[meax98]

ultrasonic dog whistle

Try this one. If you need more power you could use audio amp and piezo horn.

regards
meax98

 

[meax98]

ultrasonic dog schematic

Something is wrong with attachements:


meax98

 

[flatulent]

ultrasonic whistle circuit 555

Since the previous post did not upload the circuit, try this. You can use a 555 timer to make a square wave of the frequency you want. Put the output through a capacitor to a small loud speaker. Measure the ac voltage across the speaker. If it is less than the output from the 555 with the speaker removed, you can put a logic gate line driver or other type with higher current capacity (putting all six gates of a 4049 in parallel will also work.) output and then out of that go to the capacitor and speaker.

 

[meax98]

dog whistle circuit

I will try again, so it is coming:


meax98

 

[macxom]

ultrasonic dog whistle schematic

ok thank ....

 

[Sobakava]

4049 dog whistle

Is it really effective? I've a problem with one of them

 

[meax98]

how to make an ultrasonic dogwhistle

It worked for me. But I tried it with audio amp and piezo horn. I'll send schematic, but I don't see any attachements button.


regards
meax98

 

[sick_man]

dog whistle piezo amplifier

why bother with electronics one

a simple blow of a whisle the whisle is of the ultrasonic band made of metal

will give the desired wavelengh

and the tension you play can than be used too command the dog etc .....

other than this
build a simple pic 16f84 pwm output you can then adjust via some buttons and presets

and use an ultrasonic transducer and a driver transisotor npn bd547 or something

 

[mRul]

ultrasonic dog whistle electronic schematic

hi..
i'm new here..
i,ve been searching for this cuircuit for sometime...
could i someone give me schematic...
need it for my neighbour's dog..

 

[tanveerriaz]

dog whistle schematic

http://www.geocities.com/tomzi.geo/whistle/whistle.htm