The electronic scale is mainly controlled by the single-chip microcomputer STC90C52RC core to realize the basic control functions of the electronic scale. The system part mainly includes STC90C52RC and classic reset circuit; the data acquisition part is composed of weighing sensor, signal amplification and A/D conversion part, and the signal amplification and A/D conversion part are mainly realized by the dedicated high- 24-bit AD conversion chip HX711. The human-computer interaction interface is keyboard input and dot matrix LCD display, mainly using 4*4 matrix keyboard and 1602 LCD display, which can conveniently input data and intuitively display data. The system expands the electronic calendar clock. The system can be divided into six parts: small system, data acquisition, human-computer interaction interface and system power supply, clock and voice reporting. The electronic scale can realize basic weighing functions (weighing range is 0-3K, weight error is not more than ±0.005Kg), and expands the functions of clock and voice reporting. The clock module can also set the alarm function. The system also has an over-range alarm function when weighing., Weight: 309.0 pounds, Manufacturer: IJSDNVJNDX