electronic mosquito repeller circuit - Make this Electronic Mosquito Repeller Circuit

Make this Electronic Mosquito Repeller Circuit

In this post we discuss about a simple electronic high frequency mosquito repellent circuit, which is supposed to drive away mosquitoes through its tuned high frequency pulses.


Mosquitoes can be considered as one of the most irritating bugs that not only trouble us a lot but have the potentials of spreading deadly diseases. These never seem to end, the more we find ways of eliminating them the more they come.

There are plenty of methods that have been developed today for tackling this issue, take for example the electrocuting bat, the mosquito repelling creams, coils, mats etc.

All of these may look effective but have never been the ideal method of termination.However there is one more method which is though quite controversial may be considered as the most efficient ways of all, provided the results are accurately optimized.

Here we are discussing the method which probably is able to drive away the mosquitoes with the help of frequency generations. Researchers have found that bugs and insects are typically allergenic to a certain spectrum of frequency level called the ultrasound frequency.

This frequency is beyond the hearing range of the humans, but can cause a lot of uneasiness to the insects and also to animals like dogs and cats.

Though it can be debatable, there have been scientists and many folks around who have found this method pretty useful for controlling mosquitoes.One sample circuit has been presented here which has been specifically devised for generating sound at the ultra frequency levels.

Circuit Description

The proposed electronic mosquito repeller circuit cannot be considered “the be all and the end all”, but definitely has plenty of space for experimentation.

If the settings are done impeccably, and hits the “bull’s eye”, you could be just lucky.The idea is very simple and involves below ordinary components. A couple of transistors and a couple of capacitors with some resistors is all you would need.

The circuit is configured as a astable multivibrator, the selected components set the circuit to oscillate at the intended frequency.

The slight imbalance with the symmetry (different capacitor values) of the circuit has been intentionally so that the generated waveform is symmetrical, another aspect that is important for implementing the proposed results successfully.

The frequency is outputted over a piezo electric transducer which is the best interpreters of frequencies, typically at very high levels.

The given pot should be tried at different levels and tested in a mosquito infested area, it may be further optimized until, hopefully some positive and encouraging effects are observed, meaning if you finally see the mosquitoes actually fleeing.


mos rep - Make this Electronic Mosquito Repeller Circuit




51 thoughts on “Make this Electronic Mosquito Repeller Circuit

  1. Have questions? Please feel free to post them through comments! Comments will be moderated and solved ASAP.
  2. sir helo……
    its very intresting… simple i havn't listened such circuits. i will sure try this. sir but, will it hav any effects on humans? how much distance can it repel the mosquito?

    • Hi Siree,

      Thanks, but remember this circuit is extremely difficult to optimize and moreover different breeds of mosquitoes may react differently, some may even get attracted with this circuit instead of fleeing….so this circuit can produce varied, confusing results:)

  3. sir… generallyy i like to make some simple circuits which i ca use evryday in my daily life.so that by seeing that circuits i feel satisfied. so plz tell me such circuits…. ofcourse the above circuit is of my interest…
    so plz suggest me

    • Hi Siree,

      There are many simple circuits which have been discussed in this blog, so it's difficult to suggest which one would be suitable for you.

      You can search for any desired circuit of your choice in this blog, then I'll tell you how to go about.

      Use the search box at the right top corner of the page for searching.

  4. oh..
    i c . diffrent breed responds in different way u mean… okay sir… but how much distance can dis circuit make mosquiotoes to flew…? is this not suggestable to use?

  5. What is the function of T1? As per diagram collector of only T2 is connected with Pizzo. Why collector of T1 is not connected with Pizzo?

    • What is the frequency of sound? I think its about 9KHz. But 27mm Piezo element having resonance frequency is only 2KHz so it will destroy. So plz suggest which Piezo element should I use?

    • at 2Khz it's response will be the best, but it can be driven at higher frequencies also, because here we not interested in sound pressure rather only the frequency which would rattle the mosquitoes (hopefully).

  6. hello sir…how r u?

    as u said in above reply that this circuit can produce confusing results…
    so,can this circuit be modified OR advanced towards melioration using ne555 or ne556 timer ICs ?
    cuz i hv read from datasheet that ne555 can produced 500 khz,,,
    i am beginner and i hv little idea about electronics,,,

    hashir waseem

    • Hi Hashir,

      I am good thanks,

      The above AMV circuit is also capable of producing very high frequencies, the issue is not about the frequency level rather its effectiveness in driving the mosqitos away.

      Even the latest iphones claim to have advanced mosquito reps built in but even their apps have failed with the results…..it seems the mosquitos are the ultimate winners.

  7. Thnx for ur above reply,,,
    i want to ask a question 2 u,,, it may be objectless…
    i am student of 3rd semester electronics engineering,,still my knowledge is very litttle about electronics,,,and i want to be very good engineer of electronics like u,,,that i could design my desired circuit myself, instead of downloading from internet or other sources
    how can i do this ?
    By concentrate on theory more or practical more? Cuz i hv heared different opinions from different people,,, so i m confused !
    Plz tell me what would you suggest or what steps should i must take with my regular course for becoming good engineer of electronics.
    hope u understand what i want 2 say actually

    hashir waseem

  8. hello sir,

    i hv an idea in my mind,,could it b possible or not? below

    *Can frequency of above circuit b use as a remote control for switching(on/off), receiver circuit set on particular frequency,(as TV set is controlled by its remote of 38hz)

    if yes,
    *how can i vary the range of frequency of above frequency emitter to desired level?

    • I am sorry that's not possible, TV remote works on infra red frequency, which is picked by an IR sensor..the above circuit generates RF frequency….both are entirely different.

    • Ok, thanks 4 above reply,

      Sir, actually I m trying to make such a circuit which can control more than 1 appliances of my room by only one remote control with different frequencies using relays in different positions, each frequency is for controlling separate appliance ( so that, 2 fans, tube light ,TV set is controlled by on remote with diff freq. )

      But,till now I m only able to make a circuit which can control only on appliance by one TV remote with 38 kHz infrared frequency,

      So,can u help me more in this regard or related ,
      Or do u have any homemade circuit diagram, post or article for making remote with required infrared frequency ,,

      Although my idea is too lengthy without using micro controller IC for controlling appliance by different frequencies.

      but I want to do experiment my idea weather it is working or not

    • ok,again thanks 4 ur xpert opinion

      as above idea without using micro-controller is very much faulted and objectless,

      then, what should i do to achieve my goal of above creation using micro-controller IC,, I have no idea of programming or micro-controller ICs,

      can u provide me related material or initial point from where i can learn about basic programming or how to program micro-controller ?
      i will b thankful 2 u

    • Learning microcontroller programming is quite a complex subject and should be learned only from am institute or from somebody expert in the field, through personal guidance…learning online would be rather difficult and inefficient.

  9. hello sir
    I've encountered your blog while I was searching the internet and I found it very interesting.

    I'm still a student and I have this subject in electronics and I thought that making an electronic mosquito repellent will be a good topic for my project.

    I want to ask how can I vary the frequency that will be emitted by the circuit?..

  10. Dear Sir,
    I am the beginner in doing simple electronic circuits, so please kindly suggest me the equipments i need to buy for doing those circuits…Actually i purchased a soldering instrument and its requirements and i am interested in doing mosquito repellent circuits and many more….kindly suggest me sir…

    • Dear Deepaka,

      you will need a soldering iron, solder wire, a wire snipper, desolder pump, general purpose PCBs, etc…..begin by making a work bench variable power supply first, and after that you can proceed with other projects.

  11. Sir,
    First of all thank you very much for all your valuable supports given for my water controller project. It is working perfectly. Now i am in the middle of making multi insect repellent which can be used for repelling all types of insects, even dogs, cats etc could be repelled. Before proceeding further, let me ask you two questions:-
    1). Have you heard about any insect repellent circuit which is completely functioning or any such products in market ?
    2). What type or buzzer to be used for freq. upto 90 Khz ? Can an ordinary 8 ohm 0.5 W buzzer will function atleast in freq. range of 20-30 Khz ?
    Expecting ur reply soon as b4.

    • Hi Arun,
      congrats on your success!

      I personally am very sceptical about this concept, according to me frequencies cannot drive away insects.

      Standard speakers will not produce 90kHz, you can use piezo transducers for it.

      Do let me know the results if you are actually trying out any such circuit.

  12. Of course i will sir.
    On searching the internet about this topic in deep, i got several verified projects based on this, one of those saying that at high frequencies , the insect will think that some sort of dragonfly is coming to catch them and will fly away from the area. I believe thz to an extend since this statement can be true. What z ur opinion about this ?
    Would you mind telling me how much does the piezo buzzer costs ?

  13. hi swagatam,

    i am a farmer, and need a simple repelling device for use in agricultural equipment, so i can reduces insecticide use.

    device features;
    a. solar powered with rechargeable battery.
    b. a multi pulse repeller, keeps changing the ultrasonic pulse it emits. prevent pests from getting used to the sound.
    c. effective range: up to 5000sf.
    d. ultrasonic frequency: from 13.5khz to 95khz.
    e. dual speaker or more.

    could you please help me with a circuit diagram?

    thank you.
    cia brisat

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