Mosquitoes are very annoying. It will not be able to sleep in our homes if there are many mosquitoes naughty. In the world of electronic mosquito repellent device created quite sophisticated. The way it works to produce high-frequency sound vibrations, which had not captured the human ear. The series is based on the theory that insects such as mosquitoes can be rejected by using sound frequencies in the ultrasonic (above 20kHz) range. The series is only 4047 CMOS IC PLL, cable as working in 22KHz oscillator. A complementary symmetry amplifier consisting of four transistors are used to strengthen the voice. Speaker PIEZO buzzer to convert the output of the amplifier for ultrasonic sound that can be heard by insects.
Mosquito repellent circuit scheme
The series could use a 12V DC voltage
Place the electronic circuit in a dim, dimly lit or completely dark. The results can not you hear with your ears because
the vibration frequency is high enough. Ear which can hear only the mosquitoes only.
Layout IC CD4047
Block and Connection Diagrams IC CD4047B
No comments:
Post a Comment