Power up the silicon breadboard in Circuit Builder, an original browser engineering puzzle based on digital logic and Boolean algebra. Toggle binary input switches and orient AND, OR, NOT, and XOR gates to deliver the required voltage to target CPU microchips with zero downloads!
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IC Board1
🔌 HOW TO PLAYTap logic gates to cycle AND / OR / XOR or drag components into sockets to illuminate the LED!
Circuit Builder
Click inputs to toggle 1 or 0, and click logic gates to cycle AND, OR, and XOR modes. Boot up the CPU core!
Tactician: 6x6 silicon board with AND, OR, and XOR gates and dual CPU cores.
Personal Best: 0
Current Halted
Inspect the logic gate truth tables before flipping switches.
CPU Booted!
Logic gate outputs match all processor target voltage states.
Round Score
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Total Score
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How to Play
Toggle Inputs: Click input nodes on the left to flip them between High (1, cyan) and Low (0, dark).
Cycle Gates: Click logic gate boxes to switch their type between AND, OR, and XOR.
AND Gate: Outputs 1 only if both incoming wires carry a 1.
OR Gate: Outputs 1 if at least one incoming wire carries a 1.
XOR Gate: Outputs 1 only if the two incoming signals are different.
Target Core: The target CPU core on the right must receive a High (1) signal to power up and complete the stage.
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The Foundation of Computing: Boolean Algebra & Logic Gates
Every supercomputer, smartphone, and microprocessor on Earth relies fundamentally on the principles of digital logic codified by mathematician George Boole in 1847. Circuit Builder immerses players in this foundational computing architecture, transforming raw binary switches and logic gates into an intuitive, visually stunning web puzzle.
By routing digital current through silicon junctions, you directly apply the laws of Boolean algebra. Whether configuring a simple AND conjunction or designing a complex XOR parity checker, you will hone your analytical reasoning, truth-table fluency, and multi-step deduction skills.
1
Examine Target Voltage
Look at the target CPU core on the right. Identify whether it demands a High (1) or Low (0) signal to initialize.
2
Work Backward from Gates
If the final gate is an AND gate requiring an output of 1, both of its incoming input wires must carry 1. Reverse-engineer requirements back to the switches.
3
Leverage XOR Discrepancies
XOR (Exclusive-OR) gates are ideal for parity checking. If you need a 1 from two identical inputs, replace the gate with an OR or AND!
4
Deploy Logic Probes
When an intricate multi-gate circuit fails to boot, activate your Logic Probe booster to immediately identify the single incorrect gate setting.
Truth Tables of Core Logic Gates
Input A
Input B
AND (A ∧ B)
OR (A ∨ B)
XOR (A ⊕ B)
0 (Low)
0 (Low)
0
0
0
0 (Low)
1 (High)
0
1
1
1 (High)
0 (Low)
0
1
1
1 (High)
1 (High)
1
1
0
Frequently Asked Questions
How do you play Circuit Builder?
Toggle binary input switches (1 or 0) and rotate logic gates (AND, OR, NOT, XOR) on the microchip breadboard to direct electrical current. Power all target CPU output nodes with the required binary values to solve each stage.
How do the logic gates operate?
AND gates output 1 only when both input signals are 1. OR gates output 1 if at least one input is 1. NOT gates invert incoming signals (0 becomes 1, 1 becomes 0). XOR gates output 1 only when inputs differ.
What boosters and engineering tools are available?
Circuit Builder features three diagnostic tools: Logic Probe (auto-corrects one misaligned logic gate), Oscilloscope Sweep (highlights the active current flow along live traces), and Undo (reverses your last toggle or rotation).
How do the three difficulty tiers differ?
Apprentice (Easy) features a 5x5 breadboard with AND/OR gates and 1 target CPU. Tactician (Medium) features a 6x6 board with NOT/XOR gates and 2 CPU targets. Grandmaster (Hard) features a 7x7 board with complex integrated circuits and 3 CPU targets.
Does Circuit Builder save my high score?
Yes, your personal best score, circuits booted, and records are saved automatically in your browser using both localStorage and a secure SameSite cookie.
Can I play on smartphones without lag?
Yes. Engineered with vanilla HTML5 Canvas 2D and Web Audio API procedural synthesis, Circuit Builder operates at a flawless 60 FPS across all mobile and desktop browsers with zero downloads.