Can AI Really Design Electronic Circuits? From Text Prompts to SPICE Simulation
See how AI turns text prompts into electronic circuit schematics, and why SPICE simulation is essential for checking whether an AI-generated circuit actually works.
Inverting Op-Amp Amplifier: Design, Gain Formula, and SPICE Simulation
Complete engineering guide to the inverting op-amp amplifier. Learn the closed-loop gain derivation, virtual ground concept, rail saturation clipping, and verify with interactive SPICE simulation.
How to Build a 2-Bit Magnitude Comparator Using Logic Gates
Learn how to design and simulate a 2-bit binary magnitude comparator using basic logic gates (AND, OR, NOT, XNOR). Includes complete 16-row truth table, Boolean equations, and interactive SPICE simulation.
Zener Diode Voltage Regulator: Design, Resistor Calculation, and SPICE Simulation
Learn how a Zener diode voltage regulator works in reverse breakdown, how to calculate the series resistor Rs, why dynamic impedance causes line variation, why voltage drops under load, and how to verify regulation limits with SPICE simulation.
AM Modulation Simulator: Index, Sidebands & Demodulation
Learn how amplitude modulation works, calculate modulation index and sidebands, examine overmodulation distortion, and simulate AM signals in CircuPilot Signal Lab.
Build and Simulate a 4-Bit Binary Adder with Logic Gates
Learn how to construct a 4-bit ripple-carry binary adder from full adders and basic logic gates. Includes 74xx IC pinouts, SPICE simulation, and carry propagation.
Full-Wave Bridge Rectifier with Capacitor Filter: Ripple Voltage and SPICE Simulation
Learn how a full-wave bridge rectifier works, how a smoothing capacitor reduces ripple voltage, and how load resistance affects DC output. Explore both circuits with SPICE simulation.
Arduino 0–30V DC Voltmeter: Voltage Divider, Circuit, and LCD
Build a 0–30V DC digital voltmeter using an Arduino Uno, a 56kΩ and 10kΩ voltage divider, and a 16x2 character LCD. Learn divider calculations, ADC resolution, noise filtering, and circuit simulation.
Build and Simulate an Arduino LDR Night Light with AI
Design an automatic Arduino night light using an LDR photoresistor and AI. Simulate the circuit in your browser, adjust lux levels interactively, and avoid twilight LED flicker with hysteresis.
How to Remove a 1 kHz Whistle from Audio in Your Browser: An Interactive Notch Filter Experiment
Learn how digital notch filters eliminate narrowband tonal interference from audio. Interactively remove a 1 kHz whistle, tune center frequency and Q factor, and compare live A/B audio in CircuPilot Signal Lab.
Explore DSP and Digital Communications Online with CircuPilot Signal Lab
Free browser-based DSP and communications simulator. Interactively explore Nyquist sampling, ADC/DAC quantization, FIR/IIR filters, Z-plane pole-zero stability, and AM/FM/PSK modulation in CircuPilot Signal Lab.
Simulate an RC Low-Pass Filter: Cutoff, Gain & Phase
Learn how an RC low-pass filter works, calculate its cutoff frequency, and simulate why adding a load resistor drops gain and shifts the cutoff in SPICE.
Arduino Timer Interrupts: Generate Periodic Events Without delay()
Configure Arduino Timer1 interrupts in CTC mode. Calculate compare match intervals on a 16 MHz Uno and generate periodic events without blocking delay().
Can ChatGPT Design Circuits? Real Simulation Test
Can ChatGPT design and simulate circuits? We tested ChatGPT vs CircuPilot on an RC filter, a 555 timer, and an Arduino sensor circuit to see where AI text ends and real SPICE begins.
ATmega32 vs Arduino Uno: Registers and Simulation
Compare ATmega32 and Arduino Uno (ATmega328P) architectures. Explore register maps, Timer0 configuration, interrupt vector tables, and browser simulation.
NGSpice vs LTspice: Technical Differences, Syntax, and Compatibility
A technical comparison of NGSpice and LTspice for circuit designers. Explore integration methods, behavioral source syntax, automation trade-offs, and online simulation workflows.
How to Design and Simulate Arduino Sensor Circuits with AI
Learn how to use AI to design, wire, and simulate Arduino circuits with sensors (like the LM35 or LDR) directly in your browser. No hardware required.
Simulate & Program Arduino in Your Browser
Write Arduino code, simulate it online, and upload it directly to your physical Uno or Nano using the Web Serial API. No IDE installation required.
How to Share a Circuit Simulation as a Link (Free)
Send a working circuit — Arduino code included — as a link your teacher, classmate or forum can open and run. How the main simulators share, and the quickest way with no sign-up.
How to Tell if a Buzzer is Active or Passive (And Why Arduino tone() Stays Silent)
Identify active vs passive buzzers with a fast 3V battery test, learn why Arduino tone() fails on active buzzers, and calculate correct series resistor values.
555 Timer Astable Calculator and Simulator
The 555 astable formula, the duty cycle limit nobody mentions, and a browser simulator that shows what the chip actually does instead of only what the arithmetic says.
Arduino DC Motor Speed Control with PWM
Why a motor on an Arduino pin does nothing, the one transistor that fixes it, and why motor speed follows the average of a PWM signal rather than its RMS.
LDR Circuit: Which Way Round Your Divider Goes
A photoresistor produces no voltage on its own. Which side of the divider it sits on decides whether your reading rises or falls with light — and that is the whole design.
RC Time Constant: Simulating Charge and Decay Curves
Why an RC transient often plots as a flat line, what the time constant actually predicts, and real ngspice numbers for the charge and decay of a 10 kΩ and 100 nF pair.
LM35 with Arduino: Wiring, Code, and the 0.5 °C Trap
The LM35 gives 10 mV per degree, which makes the wiring trivial and the arithmetic a trap. Why a 5 V reference costs you half a degree, and what to do about it.
16x2 LCD Shows Nothing? The 4-Bit Wiring Checklist
A blank HD44780 display gives you no error to debug. The handful of causes, in the order they actually happen, and how to tell them apart without a scope.
ATmega16 Simulator Online — Register-Level AVR in a Browser
Run ATmega16 code without installing anything. Register-level I/O, the ADC, external interrupts and Timer1, executed instruction by instruction in a browser tab.
AVR External Interrupts — Why Your ISR Never Fires
INT0 and INT1 on AVR, and the handful of reasons an interrupt handler stays silent — missing sei, the wrong edge, a floating pin, or a volatile you forgot.
Simulate analogRead: Read a Potentiometer, No Hardware
What analogRead actually measures, why it returns 0 to 1023, and how to test an analog input in a browser by turning a simulated potentiometer.
Simulate Logic Gates Online and Check the Truth Table
Build AND, OR, NOT, NAND, NOR, XOR and XNOR in a browser, drive the inputs and read the output. Why a gate needs a supply and a load in a simulator, and the mistake that makes one look broken.
Turning a Schematic Image into a SPICE Netlist
What it takes to read a circuit photo and produce a netlist, what the 2026 research achieves, and how to do it in a browser without training a model yourself.
LTspice Online: Can You Run LTspice in a Browser? (Direct Web Alternatives)
Looking to run LTspice online? While LTspice has no official browser build, here are the real web-based SPICE simulators that run without downloading software.
What Resistor for an LED? Why Calculators Disagree
The formula gives one number and your meter gives another. Why forward voltage is not a constant, what that does to the current, and how to check a value before you build it.
Draw a Circuit by Hand and Simulate It in the Browser
Sketch a circuit the way you would on paper, and get a working schematic and a real SPICE simulation. How the reader works, what it handles, and where it struggles.
What Wattage Resistor Do I Need? Check Before It Burns
Resistors are sold by resistance and rated by power, and the second number is the one that lets out the smoke. How to work out the dissipation in your circuit and pick a rating that holds.
Why Your Voltage Divider Drops Under Load
The divider formula gives 5 V and your meter reads 0.39 V. Here is why a load changes the answer, what the collapse actually measures, and how to size a divider that holds.
Simulate a Blinking LED Online (Astable Multivibrator)
Build the classic two-transistor LED flasher in your browser and watch the LEDs actually alternate. Why most simulators show it frozen, and how to set the flash rate with two capacitors.
Multisim Live Has Shut Down: Where to Move Your Circuits
Multisim Live closed on 15 September 2026. What happened to the circuits saved there, and an honest comparison of the free browser simulators to move to.
Free Image to Schematic Converter (No Signup Required)
Every free option for turning a circuit picture into a schematic, and exactly where each one stops — tracing services, editors, PCB tools and ours.
Free: Simulate a Circuit from a Photo of Its Schematic
Photograph a schematic and get a working simulation free in your browser — no redrawing it component by component, no install, no account needed to try it.
Why Your SPICE Simulation Fails (Floating Nodes and Ground)
Singular matrix, no convergence, floating node — what these SPICE errors mean, why a missing ground causes most of them, and how to fix each.
How to Simulate an Arduino Circuit Online Without Hardware
Wire a button and an LED to an Arduino Uno, compile the sketch, and watch the pins change — entirely in a browser, with no board, no IDE, and no install.
How to Design an RC Low-Pass Filter in SPICE
A complete guide on designing an RC low-pass filter. Learn the theory, calculate the cutoff frequency, select resistor & capacitor values, write a SPICE netlist, and run online simulations.
LTspice vs Online SPICE Simulators: Which Should You Choose? (Detailed Comparison)
Compare desktop LTspice against modern browser-based SPICE simulators: solver performance, netlists, component libraries, cloud sharing, and when to pick each tool.
AI Circuit Design: Natural Language to SPICE Schematics
Learn how AI Circuit Design platforms utilize Natural Language Processing to generate electrical schematics, write SPICE netlists, and automate EDA wire routing.
How to Simulate SPICE Circuits Online: Free Tutorial
Run electrical circuit simulations inside your web browser. Learn how to construct standard SPICE netlists, configure transient analyses, and plot ngspice signals.