Build logic circuits through visual puzzles.
Circuit Forge is a puzzle-driven laboratory where engineers, programmers, and puzzle enthusiasts design real logic circuits by solving crisp input–output challenges.
LEVEL 23 · BINARY COUNTER
Route inputs through combinational and sequential blocks to produce the required 4‑bit sequence.
Tools that miss the point
Most circuit tools feel like textbooks or toys. Circuit Forge is built for people who think in systems and crave the satisfaction of solving something non‑trivial.
Too academic, not enough intuition
Formal logic courses lean heavily on notation and proofs, leaving little room for playful experimentation or fast feedback loops on real circuits.
Games that oversimplify the craft
Many “logic games” stop at tapping lights and toggling switches, never challenging you with multi‑stage designs, timing, or resource trade‑offs.
No bridge to real digital systems
When tools aren’t grounded in real design patterns, it’s hard to transfer what you learn into FPGA work, embedded systems, or robust software architectures.
Puzzles as a design lab
Circuit Forge turns digital logic into a sequence of visual problems where every level feels like debugging and shipping a tiny hardware feature.
Each level specifies concrete input sequences and expected outputs. You arrange gates and wires, then simulate to see exactly where behavior diverges.
As you progress, you unlock latches, flip‑flops, and counters that introduce state, timing, and subtle failure modes to reason through.
Challenges are architected around real motifs: debouncing, decoding, pipelining, and finite‑state machines that mirror modern digital systems.
A digital lab on your screen
Circuit Forge orchestrates circuits, puzzles, and analytics into one cohesive environment so every solved level becomes a new building block in your mental toolkit.
Visual circuit builder with precise simulation
Drag, rotate, and connect gates on a grid‑based canvas that feels like a polished EDA tool, then simulate with deterministic timing to inspect every bit transition.
Progressive puzzle arcs
Move from single‑gate sanity checks to multi‑stage combinational logic, then into stateful machines where history matters as much as the current input.
Performance analytics dashboard
Track solution time, gate count, and alternative designs, then compare them to your own history to see how your intuition about circuits evolves.
Circuit export & sharing
Export select designs into sharable diagrams or structured data so you can discuss them with teammates or adapt them to your own projects.
How it works
Circuit Forge wraps the full arc of discovery into three tight steps: understand the requirement, architect the circuit, then iterate until everything snaps into place.
Study the input‑output contract
Each puzzle opens with a clearly defined truth table or timing diagram. You see the contract before touching a single gate, just like a real specification review.
Design, wire, and simulate
Drag gates, create buses, and route connections. Run simulations step‑by‑step or in continuous mode to watch signals propagate and pinpoint faulty reasoning.
Refine for insight and elegance
Once the level passes, experiment with alternative topologies. Use analytics to reduce gate count, shorten critical paths, and lock in a deeper understanding.
Choose your lab tier
Start with foundational circuitry for free, then unlock deeper systems, analytics, and export capabilities as you move into Pro. Enterprise options are tailored in direct conversation.
Free
Explore the lab, learn the basics, and decide how far you want to take your circuit design skills.
20 guided levels from fundamental gates through simple combinational circuits.
- Core gate library: AND, OR, NOT, NAND, NOR, XOR, XNOR.
- 20 basic puzzles with clear truth tables and instant feedback.
- Unlimited simulations on each level.
- No access to sequential components or analytics dashboard.
Pro
Unlock the full Circuit Forge experience with advanced challenges, sequential logic, and deep performance insights.
For engineers, programmers, and puzzle solvers who treat each level like a mini‑design review.
- 100+ advanced challenges spanning counters, FSMs, encoders, and more.
- Sequential logic components including flip‑flops, registers, and clocked modules.
- Performance analytics dashboard: gate count, depth, and iteration history.
- Circuit export functionality to share or adapt designs outside the game.
Enterprise
Interested in team‑wide access, custom problem sets, or integration into your training programs?
Pricing and capabilities are defined collaboratively based on your needs.
- Enterprise plan details are not listed publicly.
- Use the contact form below to start a conversation about volume access.
Talk to the lab
Whether you’re evaluating Circuit Forge for personal deep work or for a full team, we’re happy to discuss fit, roadmap, and integration ideas.
Design conversations welcome
Share how you currently teach or explore digital logic, and we’ll help map Circuit Forge into your workflow—whether that’s a solo practice routine or a structured program.
Join 500+ teams
Circuit Forge is built for teams who treat learning as an engineering discipline. Share puzzles, compare designs, and grow internal intuition for digital systems.