Cirq

Prove your circuit
before you wire it

A hyperrealistic 3D circuit simulator with SPICE-accurate simulation and an AI assistant. Build, test, and verify — no hardware required.

Start simulating free See how it works
±2%
vs real hardware
<100ms
simulation time
ngspice
engine

What Cirq does

Real 3D breadboard
Place resistors, LEDs, capacitors, transistors, MOSFETs, and ICs on a 400-point breadboard that follows real connection rules.
Three.js r128
SPICE simulation
Every circuit runs through a real ngspice backend. DC operating point, AC frequency response, transient analysis — hardware-accurate results in under 100ms.
ngspice 45.2
AI circuit assistant
Ask questions, get explanations, or just say "build a 555 astable circuit" — the AI places components directly on the breadboard.
Claude via Bedrock

How it works

STEP 01
Place components
Click a hole for pin 1, then pin 2. Resistors, LEDs, transistors, ICs — the breadboard enforces real connection rules automatically.
STEP 02
Run SPICE
Hit "Run Simulation". ngspice solves the circuit and returns node voltages and branch currents within milliseconds.
STEP 03
Measure with DMM
Place a virtual multimeter probe on any hole. Read voltage, current, or resistance — same workflow as a real bench meter.
STEP 04
Verify, then build
If the simulation matches your expected values, your physical circuit will too. Catch errors before touching a wire.
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