Ultrasonic Whistle Circuit - Dog Whistle, Insect Whistle
Normal dog and insect whistles operate in the 30-50 kHz range, which is often too high. This alternative whistle circuit operates at 11-22 kHz range.
This lower band is apparently more appropriate for older dogs, and some other insects, which may not be able to hear up to the 30-50 kHz frequencies that are used in commercial devices.
The circuit uses a 555 timer, along with various other components. The circuit uses a potentiometer (wired as a variable resistor), which is controls the operating frequency. You may need to experiment with the output frequency so that your target animal best responds.
The circuit does not need an etched PCB (Printed Circuit Board), and it can be built on a vero-board, strip-board, perf-board, etc...
It would also be possible to make this circuit sound-activated, by using the Clap Switch circuit in combination. This would make an ideal anti dog-bark circuit. The clap switch would detect the dog barks, which would then activate this circuit, which in turn would emit a high-pitch frequency, making it unpleasant for the barking dog.
- Dog Whistle Sound
- Ultrasonic Whistle
- Dog Whistle Audio
- Ultrasonic Dog Whistle
- Ultrasonic Circuit
this circuit is very nice.iwant to know about robotics,how we have to handle them and how we can add new features to them
I don't know if my dog actually hears it since I don't share his ears but he definitely pops his head up when I turn it on. Do you think this sound could be harmful for my beloved pet?