Ensure the downloaded compressed archive contains at least two critical file types:
Connect the (Power Down and Serial Clock Input) pin to Arduino Digital Pin 2 . Power: Connect VCC/VDD pins to power rails and GND pins to the ground rail. 4. Writing the Arduino Simulation Code
Right-click the HX711 component block in your schematic layout, select "Edit Properties," and verify that the "Program File" or "Model File" paths match the external simulation engines supplied by your library creator. Constant Zero or Static Output Readings
Remove unnecessary visual tools (like virtual oscilloscopes) or lower the simulation frame rate.
C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional\MODELS hx711 proteus library
In hardware, you connect a load cell (Wheatstone bridge) to the HX711, and the HX711 connects to a microcontroller via two pins: and DOUT .
Let us simulate a simple weight scale using:
There are several ways to obtain an HX711 model for Proteus:
HX711 is a precision 24‑bit analog-to-digital converter designed specifically for electronic scales and industrial control applications. Manufactured by Avia Semiconductor, this chip integrates a low‑noise programmable gain amplifier (PGA), an internal oscillator, and a stable voltage regulator—all on a single chip. It communicates with a microcontroller over a two‑wire interface (data line DT and clock line SCK). The HX711 is often used with a load cell, which outputs a tiny differential voltage proportional to the applied weight. The HX711 amplifies this signal, converts it to a digital value, and then sends it to a microcontroller like Arduino, 8051, STM32, or ESP32. Ensure the downloaded compressed archive contains at least
Search for verified ZIP repositories on open-source hubs or engineering forums like GitHub, The Engineering Projects, or Microcontrollers Lab.
Connect the (Data Output) pin of the HX711 to Arduino Digital Pin 3 .
If Proteus complains about a missing model when opening a saved schematic, it means your .IDX and .LIB files are in the wrong directory or your version of Proteus is missing the third-party simulation engine binary ( .HEX or .DLL simulation model model file) for that specific component. Verify the file placement using the alternative paths mentioned in the installation step.
) and the differential input voltage can be calculated using the following formula: Writing the Arduino Simulation Code Right-click the HX711
, if you:
: Use a Virtual Terminal or an LCD module within Proteus to monitor the weight readings in real-time. Key Features
) of the HX711 model. This pot acts as your physical weight scale.
In the world of embedded systems and IoT, weight measurement is a common requirement. From smart trash bins to industrial weighing machines, the – a precision 24-bit analog-to-digital converter (ADC) – has become the go-to chip for interfacing load cells with microcontrollers like Arduino, PIC, and 8051.
