AC Mains (VSINE) → Transformer (10:1) → Bridge Rectifier → RC Filter → Op-Amp Summing (+2.5V) → POT (Gain Adj) → Output to ADC
The is a popular, low-cost AC voltage sensor module designed for measuring mains voltage (up to 250V AC) using a microcontroller (e.g., Arduino, ESP32). It is based on a precision voltage transformer (ZMPT101B), an operational amplifier, and a built-in potentiometer for calibration. The module outputs an analog voltage (typically 0–5V DC) proportional to the AC input, making it compatible with ADC channels of most microcontrollers.
The module is built around a micro-precision transformer and an . YouTube·Electronic Clinic zmpt101b proteus
Despite the component's utility, physical prototyping with AC mains voltage carries inherent risks. The Proteus simulation environment offers a solution by providing a virtual laboratory. In Proteus, the ZMPT101B is not simulated merely as a static component but often modeled as a complete sub-circuit. When a user places the ZMPT101B component in a Proteus schematic, they are essentially accessing a schematic capture that includes the isolation transformer, the operational amplifier (such as the LM358 often used on the breakout board), and the associated resistors and capacitors.
This write-up explains how to create a functional equivalent simulation model and interpret results correctly. AC Mains (VSINE) → Transformer (10:1) → Bridge
: High accuracy with a linearity of 0.1% and a measurement accuracy class of 0.2 .
In hardware, you adjust the onboard potentiometer until the output reads 2.5V at 0V AC input and reaches ~5V at maximum rated AC input. The module is built around a micro-precision transformer
When setting up your simulation, ensure your parameters match these standard ZMPT101B Specifications : : Measures AC voltages up to 250V AC (50/60 Hz). Operating Voltage : Requires a DC supply between 5V and 30V .
To simulate the in Proteus, you typically need to import a custom library, as it is not a standard built-in component. These third-party libraries allow you to model the module's behavior, which is centered on a high-precision voltage transformer and an LM358 operational amplifier. Proteus Library Features
In the realm of modern electronics, the interface between high-voltage alternating current (AC) systems and low-voltage direct current (DC) logic circuits is a critical design challenge. Microcontrollers, such as the Arduino or PIC series, operate at low voltages (typically 3.3V or 5V) and are highly susceptible to damage from high-voltage spikes. To safely measure AC voltage, engineers rely on voltage sensors, among which the ZMPT101B stands out as a popular, compact solution. However, testing these sensors with actual mains voltage can be dangerous and cumbersome. This is where the Proteus Design Suite becomes an invaluable tool, allowing engineers to simulate the behavior of the ZMPT101B safely and accurately before physical implementation.