The electronic scale is a modern new weighing instrument integrating testing and conversion technology, computer technology, information processing, digital technology and other technologies. It is closely related to our daily life. Electronics are mainly used as a central control unit with a single chip microcomputer, and the analog-to-digital conversion unit is composed of a keyboard, display circuit, and powerful software. Electronics are not only accurate, fast and convenient, more important automatic weighing, digital display, more and more influences to people's lives, widely welcoming. Eight-compares the design of 8 compared electronic scales are preparing for the courses or to learn a microcontroller.
1, intelligent electronic scale system design (HX711-1602)
The design of this system is mainly elaborated from hardware circuit design, software programming, and physical welding debug three parts. The hardware circuit is mainly based on the control unit of the single-chip STC89C52, and the data is acquired by the pressure sensor. The electronic scales have 24-bit AD conversion chip HX711 to the simulation collected by the sensor for AD conversion, and the conversion data sent To the single-chip microcomputer, the data shows that the LCD1602 liquid crystal is realized, and the liquid crystal display effect is stable and has no flash.
https://www.cirmall.com/circuit/16716
2. Design of smart electronic scale based on 51 single chip microcomputer (schematic + source code)
By STC89C51 single-chip + minimum system + LCD1602 LCD module + HX711AD module + LED module + buzzer + button module + 10kg pressure sensor configuration.
Specific function:
1, the digital tube shows the current weight, the unit is g;
2, there is peeled and clear function, you can pass the weight of the calibration by three buttons;
3, the maximum weighing 9.999kg, exceeding the maximum volume of sound alarm.
All materials include procedures (notes), AD schematic, protues simulation, reference papers, program explanations, simulation explanations, simulation video, schematic explanation, data use introduction, etc., the whole network is the most complete! !
https://www.cirmall.com/circuit/18418
3, electronic scale design based on MSP430F149 single-chip microcomputer - HX711-Bell-LCD1602- (Schematic + Program)
This design is composed of the MSP430F149 microcontroller core board module circuit + HX711 weighing sensor module circuit + buzzer alarm circuit + LCD1602 display circuit + button circuit circuit.
1, the weight is 0-5kg, the accuracy is 3g.
2, the button has a tutor, and the temporary beater is long.
3, the first line of the LCD1602 displays the current weight, the unit is g, the second line shows the unit price (unit is element) and the total price.
4. You can set a unit price through the button and calculate the amount of the item and accumulated.
https://www.cirmall.com/circuit/19586
4, intelligent electronic scale circuit design (HX711-LCD12864 three lines display, schematic + source code)
This paper designs a smart electronic scale, discusses the working principle of the instrument, introduces the error of the instrument from error distribution, and gives the instrument circuit design and software flow.
The smart electronic scale is mainly composed of power, weighing sensors, A / D converters, microcontrollers, keyboard / switches, LCD displays, etc. The main technical indicators are: the weighing range is 0 ~ 15kg; the index value is 0.005kg; the precision level III. The main function of the instrument has self-test, peeled, priced, unit price setting, overload alarm, etc. If the instrument does not perform the weighing operation, the sleep mode is automatically entered after 5 minutes, and the power consumption is reduced.
https://www.cirmall.com/circuit/16718
5, speech broadcast electronic scale based on STM32F407 (data contains video tutorial)
This system is mainly based on the STM32F407vet6 development board, which is weighed with an object of the HX711 pressure sensor, and the weight of the object is displayed on the OLED liquid crystal display, (with a serial assistant can also print out weight information) The weight of the object is different, and the value of body weight on the OLED liquid crystal display is also changing, and the voice synthesis module (required to power the USB charging line or USB turn TTL, the power supply is insufficient ", can be used as the weight of the object Automatically play the information of weight.
You can place your phone on the pressure sensor, observe the value on the OLED LCD screen, and listen to the speech broadcast.
Other no more than 5kg objects can be placed on the pressure sensor, observe the value on the OLED liquid crystal display, and listen to the speech broadcast.
https://www.cirmall.com/circuit/16339
6, high-precision electronic scale design based on single chip microcomputer
Based on the high-precision electronic scale of the single chip microcomputer, the accuracy is about 0.1g, the sensor is less than ten sensors for Taobao, and personal feelings can be used in such a sensor, showing OLED 0.91 inch screen, three buttons, lithium battery charge and discharge, LED display power, power chip IP5306, mainly the quality measurement section. Other feature users can develop according to actual specific development, information as programs, schematic, and PCB source files.
https://www.cirmall.com/circuit/15730
7, STM32 electronic scale DIY production
The STM32 electronic scale hardware composition includes STM32 single chip, matrix keyboard and sensor module and LCD12864 liquid crystal display module configuration. The circuit uses the A / D chip HX711, the LCD shows a unit price, weight, amount display, etc. Overweight alarms and input unit prices can be, there must be a alarm system and the input keyboard to display the sum of unit prices.
Https://www.cirmall.com/circuit/8494
8. Voice electronic scale design based on 51 single-chip microcomputer (full design information)
Hardware composition
Single Chip + Smaller System + LCD1602 LCD Module + HX711 Module + LED Module + Voice Module + Matrix Button Module + 10kg Pressure Sensor and Weighing Block
Features:
1.LCD1602 LCD display Current weight (unit is kg), unit price, total price, and accumulated total price, boot display year month, you can set time.
2. Enter the matrix keyboard.
3. With peeling function, there is a fine-tuning calibration function.
4. There is a pricing function, you can accumulate your total price.
5. There is a common price storage function.
6. Resolution 1G, error. 1881.1g. High precision!
7. Use voice chips to enable voice broadcast.
https://www.cirmall.com/circuit/14565
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