A High Precision Electronic Scale Based on STM32

摘要

A kind of high precision electronic scale with STM32F103 as the control core is designed. Mainly by the resistance strain gauge, operational amplifiers, ADC and other functional modules. Strain gages of the bridge circuit will be based on the pressure of different output voltage, through the amplifier to get a significant voltage change. Using 24-bit etc. digital-analog conversion chip, through the STM32 acquisition voltage. And the matrix keyboard design input unit price, peeled, calculate the total and overweight alarm and LCD screen display and automatic voltage calibration and other functions.