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 implementedfully 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 implemented (Arduino complete, Simulink partial). Simulink model saved to SVN. Documentation of simulink model is in progress
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
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	Done	Each button has to be connected to an interrupt. (Done) The button has to be debounced in the ISR. (Done) Please comment every source code line. (Done) Add a header to your source. (Done) Use an recursive average filter for calculation of the weight. (Done) Calculate the standard deviation to decide if the measurement is constant (threshold). (Done) resused the simulink weighing scale model from Die_Bombe and interfaced it with my custom build LCD and now both model work together. Implemented Tare button in simulink, it is working but still testing the stability when the button is pressed. Document progress within your article. ( In progress with it but not done yet)
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	Done	Done. This is the function that was casuing the slowness (get_units(15)) The sample amount was reduced and the system responded better but i will now implement the next task on the codes which should make the system even more responsive. All tasks have been implemented today and the system is very responsive but fully in arduino. The Simulink modeling is working but not all functions are fully implemented( Power button and Buzzer).
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	Done	The .mat file has been saved in the project workspace and versioned in SVN for further analysis