Ultrasonic bug-chaser


Posted on Jun 10, 2012

Low-intensity ultrasonic sound waves in the 30-45 kHz frequency band repel insects and small rodents. The unit is designed to generate a swept square wave from 30 to 45 kHz. The LM555 IC is wired as an ultrasonic oscillator driving a piezoelectric speaker of the hi-fi super-tweeter type


Ultrasonic bug-chaser
Click here to download the full size of the above Circuit.

The output of the oscillator is swept by a 60-Hz signal from the ac input of the bridge rectifier. The LED acts as a pilot.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Mains Remote Tranciever Alarm
Crossfeed Headphone Amplifier
300 Watt audio Amplifier
Octave Equalizer Circuit
Voltage Regulators
Electret mic pre amp
Rockwell Jupiter GPS module
high frequency waveform generator
Simple Voltmeter
Audio AmplifierCircuit - 30 Watts
RF Probe Circuit
Astable Multivibrator (Oscillator)
Parachute Recovery System
Disconnect anti theft alarm circuit
1.25 ~ 37V LM317 adjustable power supply configuration
Allowing only one-way operation of the motor-controlled circuit 2



Top