Mosquito Repellent Circuit. Usually in mosquito repellent circuits ic 555 is used in an astable mode to generate continuous pulses which swings between high and low. A multivibrator is an electronic circuit which is used to generate a pulsed output signal.
I had taken my home calling bell box which was not in working condition so i choose to. As we know that only female breeding mosquitoes bites humans we can use this concept and can design a circuit which produces the ultrasound in frequency range specified above. In this circuit we are using a timer ic in astable mode in order to produce frequencies at 40khz.
Portable mosquito repellent circuit as you know piezoelectric transducers tricycles have a capacitive character of the load.
Here the common form of a stable multivibrator is 555 timer ic which is used in this electronic mosquito repellent circuit and it consists of 8 pins. Human beings can hear sound in the range of 20 hz to 20 khz. Here the common form of a stable multivibrator is 555 timer ic which is used in this electronic mosquito repellent circuit and it consists of 8 pins. Components required 555 timer an electrolyte capacitor of 0 01 micro farad a ceramic capacitor of 0 01 micro farad a resistor of 760 ohms another resistor of 1 5 k piezo buzzer a spst switch a 5 v battery.
