MAJALAH DINDING ELEKTRONIK DENGAN AUDIO AMPLIFIER MENGGUNAKAN IC LM386 UNTUK PENYANDANG TUNANETRA

Abstract

Limitations in the sense of sight do not prevent the blind from getting the latest information even in the COVID-19 condition. An alternative solution is needed so that blind people can still get information without physical contact, such as in Braille. From this problem the researchers designed a wall magazine that makes it easier for blind people to get information by not touching common objects and avoiding direct contact with wall magazines in the form of sound that can be controlled by doing hand movements without touching braille but using sensors. By analyzing the regulation voltage at the source, input and output voltages on the amplifier, and the power amplifier using the LM386 IC on the device to work according to the component datasheet so that it can work properly according to its specifications. Audio amplification analysis on electronic wall magazine content with amplifier is also needed so that the visually impaired can get good information. From the research results, the gain works optimally at a gain value of 20 dB with a hearing distance of 7 meters, this is in accordance with the characteristics of the LM386 IC datasheet. The curves have the same issues, so the FFT analysis is the same which has an average range of 60 dB. With this research, it can help blind people to receive
the contents of electronic mail without difficulty.