Note: In simulation, you often need to use an oscilloscope (Virtual Instrument Mode) to verify the output waveform of the sensor before writing the code logic, as the default calibration in the library model might differ from real-world specs.
Go to the top menu and select > System Settings > Library Folders .
The allows you to simulate AC voltage measurement in a virtual environment before building physical hardware. It models the ZMPT101B AC voltage sensor module , which is typically used for measuring voltages up to 250V AC with an analog output signal. 🛠️ How to Add ZMPT101B Library to Proteus
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
Pro Tip: In simulation, you can also change the AC source frequency from 50Hz to 60Hz to test your code’s robustness.
Now that you have the library and the knowledge, open Proteus, place your first virtual ZMPT101B, and start building a safer, smarter AC measurement system today.
For those who want to avoid manual construction, existing Proteus project files (e.g., the automatic power factor correction circuit on GitHub) can serve as working examples that you can clone and adapt. Once the simulation is up and running, the same microcontroller code—whether it is for an Arduino or an ESP32—can be co‑simulated, giving you a complete virtual prototype of your AC voltage measurement system. zmpt101b proteus library
At its core, the ZMPT101B module is designed to step down high AC voltage to a lower level that can be processed by an Analog-to-Digital Converter (ADC). In a Proteus simulation environment, the library provides a schematic symbol and often a SPICE model that mimics this behavior. Without a specialized library, designers are forced to use generic transformers or complex op-amp circuits to approximate the module’s function, which can lead to inaccuracies in the simulation’s timing and sensitivity. The ZMPT101B library simplifies this process by providing a ready-to-use block that accounts for the sensor’s onboard multi-turn potentiometer and operational amplifier, which are used to adjust the output signal’s offset and gain.
| Symptom | Likely Cause | Solution | |---------|--------------|----------| | Output waveform is clipped or at 0 V | Missing DC bias (mid‑supply) | Insert a voltage divider (2 equal resistors) from 5 V to GND and feed the centre tap to the non‑inverting inputs of the op‑amps. | | Gain does not match the datasheet | Frequency‑dependent impedance of capacitors miscomputed | Ensure you calculate the capacitor reactance at 50/60 Hz and adjust the feedback network accordingly (see the StackExchange calculation). | | Transformer output is too small | Incorrect transformer type or ratio | Use a current‑type transformer; set the primary‑to‑secondary current ratio to 1000. | | Proteus does not find a part | Part name is misspelled | Always use the exact component name as it appears in the Proteus library. |
Place the ZMPT101B module from the component library. Note: In simulation, you often need to use
Furthermore, the availability of these libraries reflects the collaborative nature of the electronics community. Because the ZMPT101B is not a native component in the standard Proteus installation, many libraries are developed and shared by third-party creators or enthusiasts. These packages typically include the .LIB and .IDX files necessary for the Proteus Library Manager to recognize the part. By importing these files, a user can transition seamlessly from a schematic design to a PCB layout, as many of these libraries also include the physical footprint required for the ZMPT101B module's through-hole pins.
Connect VCC to 5V, GND to GND, and the OUT pin to an analog pin (e.g., A0) on your microcontroller simulation model.
For the simplified model (sine wave directly into A0), you should see a stable RMS value of approximately 220 V after calibration. In reality, the raw ADC readings will be between 0 and 1023, with the zero point (mid‑point) close to 512. The RMS calculation should reflect the amplitude of the AC voltage being measured. It models the ZMPT101B AC voltage sensor module
Ensure the library files were copied into the correct LIBRARY directory, not the MODELS directory, unless explicitly required by a pdif import.
Click the button at the bottom left of the Proteus interface.