Diskussion:DMS load cell with measuring amplifier HX711AD

--Onyesi-john.abiagam@stud.hshl.de (Diskussion) 09:24, 17. Mär. 2026 (UTC)

• New order: [1]
• I2C 7 Segment Display

#	date	plan for this week	Priority	progress	Comment
1	03.03.26	Send the signed contract to administration. Safety briefing Workplace preparation (login, etc.) SVN access to the work folder Wiki access to personal article Discussion of working hours (Excel spreadsheet in SVN, commit with start time, commit with end time) Transponder issuance Measure Weight with Simulink	A	100%	Contract signed and sent back to administration I have received Safety briefing from Mr Marc Ebmeyer Workplace Preparation already done SVN accesss granted Wiki access granted How to record working hours already explained Transponder already issued Mass measurement using HX711 fully implemented in Arduino Mass measurement using HX711 implemented fully implemented in SIMULINK
2	10.03.26	Save Simulink model to SVN. Document Simulink model according to this article. Add button like a real Weighing Scale. See chapter requirements. Document progress within your article.	A	100%	On/Off button logic fully implemented in Arduino complete, but not implemented in Simulink due to memory constraint Simulink model saved to SVN. How to documentation simulink model according to the article already ready Documentation of DMS load cell with measuring amplifier HX711AD in wiki article
3	17.03.26	Document your progresse here (A). Document Simulink model according to this article (A). Add button like a real Weighing Scale. See chapter requirements (A). Document progress within your article (A). Use the LCD-Display and order an I2C-Segment-Display (A). Meet all the requirements (B).	A	100%	LCD display implemented in Arduino and in simulink. Button added both for Tare and power button Documentation in progress in wiki All requirements are met
4	24.03.26	Each button has to be connected to an interrupt. The button has to be debounced in the ISR. Please comment every source code line. Add a header to your source. Use an recursive average filter for calculation of the weight. Calculate the standard deviation to decide if the measurement is constant (threshold). Use the software of this project as a starting point. Weight cell and LCD-Display are working fine. Document progress within your article (A).	B	98%	Each buttons are already connected to arduino interrupt The button is successfully debounced in the ISR. Every source code line are fully commented for readability. Header now added to the source codes A recursive average filter implemented for the calculation the weight Standard deviation implemented to calculate and to decide if the measurement is constant (threshold). I resused the simulink weighing scale model from Die_Bombe project folder and interfaced it with my custom build LCD and now both model work together. Implemented Tare button in simulink Documentation is in progress
5	31.03.26	Investigate the timing. What function is consuming what time? Do not calculate the mean. Use the LPF-result instead. Calculate the STD from the last 5 values. Finish this task ASAP so you can work with the next sensor.	A	100%	The timing issues have been solved and the system now respond faster. All tasks have been implemented and the system is very responsive. The Simulink modeling is working, Tare button, buzzer are fully implemented The Low Pass Filter result is used instead of the mean The Standard deviation is calculated from the last 5 samples of the Low Pass Filter
6	14.04.26	stable: ist calculatet late save data to .mat file (time in s, weigth in g, real weight in g) for further analysis	A	100%	Stable is no longer late, it was due to the number of samples used but it is already solved The .mat file has been saved in the project workspace and versioned in SVN for further analysis