1. Design requirements and goals
main component:
Single chip microcomputer + minimum system + LCD1602 liquid crystal display module + HX711 module + LED module + buzzer module + matrix button module + 10kg pressure sensor
The main function:
(1) The digital tube displays the current weight, the unit is g.
(2) There is a tare function and a fine-tuning calibration weight function.
(3) The maximum weighing is 9.999kg.
(4) AD adopts 24-bit AD module HX711
2. Design ideas and plans
The electronic scale can be roughly divided into three major parts, the data acquisition module, the controller module and the man-machine interface module. The data acquisition module is composed of pressure sensor, signal pre-processing and A/D conversion part. The converted digital signal is sent to the controller for processing, the controller completes the processing of the digital quantity, and drives the display module to complete the information exchange between man and machine. In addition, a special function of overload and under-quantity alarms has been added.
3. Hardware circuit
All materials include programs (notes), AD schematic diagrams, protues simulation, reference papers, program explanations, simulation explanations, simulation videos, schematic explanations, introductions to the use of materials, etc., the most comprehensive network! ! ( Https://www.cirmall.com/circuit/18418 )
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