Sensor Simulator Online
Simulate electronic transducers and microcontroller analog sampling. Model light, temperature, ultrasonic distance, and rotary angles with live transfer curves and ADC quantization.
What is a Sensor and Transducer Simulator?
A sensor simulator is an online engineering tool that models the physical-to-electrical conversion mechanisms of electronic transducers. Sensors convert environmental physical stimuli—such as illumination (Lux), thermal temperature (°C), acoustic Time-of-Flight (distance), or mechanical rotary displacement—into proportional electrical signals that microcontrollers and digital signal processors can digitize.
By modeling non-linear semiconductor behaviors (such as Steinhart-Hart thermistor equations and photoresistor power laws) alongside Analog-to-Digital Converter (ADC) quantization step sizes, this tool assists embedded developers in calibrating sensor software before hardware prototyping.
How to Use the Sensor Simulator
Model transducers and test ADC firmware in four straightforward steps.
Select Transducer
Pick from LDR light sensors, NTC thermistors, ultrasonic distance modules, or potentiometers.
Vary Stimulus
Adjust the physical input slider (lux, temperature, distance, or angle) to observe response changes.
Configure ADC
Set bit resolution (8, 10, or 12-bit) and reference voltage (3.3V or 5.0V) matching your microcontroller.
Inspect Curve & Code
Observe the non-linear transfer characteristic plot and copy the calibrated Arduino C read snippet.
Key Transducer Simulation Features
Engineered for IoT firmware engineers, roboticists, and electronics makers.
Non-Linear Transfer Curves
Real-time mathematical plotting of resistance and voltage curves with an interactive operating dot.
ADC Quantization Engine
Simulates discrete integer count conversion, step size (LSB mV), and quantization errors.
One-Click Firmware Code
Instantly generates ready-to-run C++ Arduino and ESP32 code tailored to the active sensor configuration.
Governing Transducer Equations
For an NTC thermistor, the resistance as a function of absolute temperature \(T\) in Kelvin is modeled by the Beta equation:
In ultrasonic distance measurement, acoustic waves travel at the speed of sound v ≈ 343 m/s at room temperature:
The digital integer output from an n-bit Analog-to-Digital Converter with reference voltage V_ref is given by:
Practical IoT & Robotics Applications
Autonomous Mobile Robots (AMRs)
Warehouse autonomous robots and robotic vacuum cleaners use ultrasonic Time-of-Flight sensors combined with infrared optical rangers to detect obstacles, map surrounding walls, and prevent collisions in dynamic industrial environments.
Lithium Battery Management Systems (BMS)
Electric vehicle battery packs embed NTC thermistors throughout individual lithium-ion pouch cells. Microcontroller ADCs continuously sample cell temperatures to trigger liquid cooling loops and prevent thermal runaway during rapid DC fast charging.
Frequently Asked Questions
An LDR uses a cadmium sulfide (CdS) semiconductor whose resistance drops dramatically as light intensity increases, as photons excite valence electrons into the conduction band. Placing it in a voltage divider converts this resistance shift into a proportional analog voltage.
A Negative Temperature Coefficient (NTC) thermistor is a ceramic semiconductor whose electrical resistance decreases non-linearly with increasing temperature, modeled accurately by the Beta equation: R(T) = R0 * exp(β * (1/T - 1/T0)).
An ultrasonic sensor transmits a 40 kHz acoustic sound pulse and measures the round-trip Time-of-Flight (ToF) until the reflected echo returns. Distance is calculated as Distance = (Echo Time * Speed of Sound in Air) / 2.
An Analog-to-Digital Converter (ADC) quantizes continuous analog voltages into discrete digital integer steps. The Least Significant Bit (LSB) resolution is determined by LSB = Vref / 2^n. For a 10-bit ADC at 5V, each integer step corresponds to approximately 4.88 mV.