電子磅秤在生活上非常的常見，從重量較小的秤公克一直到秤公噸，在生活上都很常用的到。電子秤的原理是秤重物品經由裝在機構上的壓力感測器，將重量轉換電壓的模擬訊號，訊號經放大及濾波處理後由ADC處理器轉換為數位訊號，數位訊號由中央處理器(CPU)運算處理電子秤，而周邊所需要的功能及各種電路也和CPU連接應用，最後由顯示螢幕以數字方式顯示重量。

在本論文中所使用的單晶片為ATMEL公司的AT89S51為主要控制晶片。目標是將電子秤經由單晶片8051做運算過後，在藉由藍芽傳輸到手機做顯示，拋開以往電子秤都是需要有線連接顯示的想法。在本論文中首先將瞭解8051、藍芽及ADC晶片的驅動電路，之後再詳細瞭解單晶片的特性，再透過C語言去撰寫程式，最後利用手機的藍芽終端機來顯示電子秤重量，來完成藍芽電子秤的應用。

Electronic scales are very common and is a crucial component in everyday life. The concept of electronic scales is founded upon the application of pressure sensors. The pressure sensors output fluctuating voltages, which are processed by an amplifier, filter, and analog-to-digital (ADC) converter. The central processing unit is responsible for further processing the digital signals to be read on a display.

In this thesis, an AT89S51 single-chip microcomputer developed by ATMEL Corporation is used. Specifically, the 8051 micro control unit (MCU) is responsible for signal computation and wireless Bluetooth function. The focus of this thesis is to set new standards for conventional electronic scales, creating a convenient solution. The 8051 MCU, Bluetooth, and ADC are researched in detail. In conjunction, the C programming language are utilised extensively. The goal of this research is to achieve flawless communication between electronic scales and mobile devices using Bluetooth.

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