ABSTRAKAlat pengukur tinggi badan dan penimbang berat badan yang sekaligus memberikan informasi berat badan ideal akan sangat bermanfaat bagi para pengguna. Oleh karena itu, dalam penelitian ini, dirancang dan direalisasikan suatu alat ukur yang sekaligus dapat mengukur tinggi badan dan berat badan serta memberikan informasi ideal atau tidaknya berat badan yang terukur. Alat ukur ini menggunakan Arduino Uno sebagai otaknya, sensor ultrasonik untuk mengukur tinggi badan, dan sensor strain gauge untuk mengukur berat badan. Data dari kedua sensor tersebut diolah oleh Arduino untuk mendapatkan indeks massa tubuh (IMT) dan berat badan ideal (BBI). Nilai tinggi badan, berat badan, dan berat badan ideal akan ditampilkan pada LCD. Selanjutnya, informasi suara menyangkut kondisi berat badan yaitu ideal, gemuk, atau kurus akan dikeluarkan oleh speaker. Berdasarkan hasil pengujian dan analisis data maka diperoleh nilai persentase keberhasilan rata-rata pada pengukuran tinggi badan adalah 96,80% dan pada pengukuran berat badan adalah 99,04%. Sedangkan tingkat keberhasilan penampilan informasi suara adalah 95%.Kata kunci: Alat ukur digital, tinggi badan, beratbadan, Arduino, output suara.ABSTRACTAn instument for measuring height and weight while providing information ideal weight for users will be very helpful. Therefore, in this study, it was designed and realized a measuring instrument which can simultaneously measure the height and weight as well as providing the ideal information whether or not the weight measured. This instrument uses an Arduino Uno as the brain, the ultrasonic sensor to measure the height and strain gauge sensor for measuring weight. Data from the sensors is processed by the Arduino to get a body mass index and ideal weight. The values of height, weight, and ideal weights will display on LCD. Furthermore, voice information regarding the ideal conditions of weight, namely ideal, fat, or thin will be emitted by a speaker. Based on test results and data analysis, obtained that values of the average percentage of success at the height measurement was 96.80% and the weight measurement was 99.04%,respectively. While the success rate of emitting the sound information is 95%.Keywords: Digital measuring instrument, height, weight, Arduino, sound output.
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