Abstract:
This Report is describing the design, construction and testing of an electronic mosquito repellent circuit where ultrasound wave is produced to scare away mosquitoes. Mosquito repellents like coils, mats, liquid vaporizers, creams are often used at various places. However, they are prone to be fatal and can cause harm to human beings. For instance, mosquito repellent creams and oils can cause adverse effects on the skin like allergic reactions. Coils, mats can produce toxic fumes when heated and cause breathing trouble, whereas liquid vaporizers can also produce fumes when heated.
For efficient results without any side effects, the most optimum solution is building a simple electronic circuit with minimal components which can produce output of ultrasound wave so as to repel the mosquitoes. In plain words, this detailed report describes a simple mosquito repellent circuit. Human beings can hear sound in the range of 20 Hz to 20 kHz. Sound of any frequency above 20 kHz is termed as ultrasonic sound. Several animals like cats, dogs, insects, mosquitoes have the feature of being able to hear this ultrasonic sound. In mosquitoes, this feature is attributed to the presence of sensory structures in their antennae. Usually, ultrasound is transmitted by male mosquitoes and received by female mosquitoes. However, after breeding, female mosquitoes generally avoid the ultrasound and this fact can be used to produce ultrasound in a range similar to that produced by male mosquitoes and repel away the mosquitoes. The ultrasound produces a stress on the antennae of the mosquitoes and repels them away.
The aim of this report is describing the design which can produce ultrasound using simple components in the frequency range of 20 kHz to 38 kHz, which can scare away mosquitoes.
