Electronic mosquito insect repellent circuit using 555 IC

Mosquitoes are one of the most irritating bugs and they spread many diseases. Wide varieties of mosquito repellents are available. Here we are talking about a method which would most likely drive away the mosquitoes with the help of certain frequency generators. Researchers have found that insects are typically allergenic to a specific spectrum of frequency range called the ultrasound frequency.This is a simple circuit of ultrasonic mosquito (insect) repeller for insect control based on the theory that insects like mosquito can be repelled by using sound frequencies in the ultrasonic (above 20 KHz) range. This insect repellent frequency is farther than the hearing range of humans, but can cause a lot of nervousness to the insects and also to animals like dogs and cats. Bug control is easy with this best insect repellent.

Circuit diagram of best mosquito control circuit

Electronic mosquito insect repellent circuit using 555 IC Electronic mosquito insect repellent circuit using 555 IC

You can also buy this assembled and tested circuit from us.     Buy ckt button Electronic mosquito insect repellent circuit using 555 IC

Components required

  1. Power supply (12V)
  2. Resistors (2.7kΩ x 2)
  3. Capacitors (0.01µF x 2)
  4. NE 555 timer
  5. IC Diode (1N4007)
  6. Piezo Buzzer

Working of bug repellent circuit

  • Here the 555 timer is configured in astable multivibrator mode, specifically devised for generating sound at the ultra frequency levels.
  • The frequency of this circuit is set to 25 kHz, this frequency falls in the ultrasound region and it is not audible to human beings.
  • The 1N4007 diode is used to get 50% duty cycle for the frequency generator.
  • The piezo buzzer converts the output of 555 astable to ultrasonic sound that can be heard by the insects.
  • This ultrasound frequency cause some irritations and uneasiness to the insects such as mosquitoes.  However it will not disturb you if you have installed this circuit of insect repellent for your home.

How to Design a mosquito repeller circuit

We need 25 kHz signal, so the time period will be 40µseconds.
Then Ton=Toff=20µSeconds.

Electronic mosquito insect repellent circuit design1 Electronic mosquito insect repellent circuit using 555 ICuse R=2.7kΩ standard.

You can also use our astable frequency calculator tool to design your own frequency.

Other 555 IC projects

You can also have the pinout of 555 timer IC from here.

42 thoughts on “Electronic mosquito insect repellent circuit using 555 IC

  1. This circuit may be able to produce ultrasonic frequency. However, it is a myth that the signal in ultrasonic frequency is able to repel mosquitoes.

    • Hi Manama,
      It is not ordinary speaker. Normal speaker couldn’t vibrate in this frequency. Please Piezo Buzzer, available in electronics components retail shops. Operation of this circuit already explained, simply 555 generates Ultrasonic sound, this frequency repel back the insects.

  2. Hello Jaseem
    I have tried this circuit but its generating a sound which is audible to humans and its very irritating sound.
    I have used 2.2K+560E=2760E
    what should I do??

  3. how effective cover range (in square meters) of this repeller?, and..
    to modify the cover range what should be changed?, thanks.

  4. I have implemented the circuit properly.But still it can’t producing ultrasonic sound.Yes,the output is irritating but human audible.
    what should I do now??????please reply as soon as possible..Urgent.

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