Test your digital logic and chip design skills. Build circuits from fundamental gates, compute ALU operations, construct counters, and generate netlists.
Construct a complete full adder (sum + carry) using nothing but NAND gates. The universal gate challenge — prove NAND is functionally complete.
Start Challenge →Load operands into the ALU simulator, select the XOR operation, and verify the result. Understand how arithmetic logic units process bitwise operations.
Start Challenge →Wire up four flip-flops into a synchronous binary counter. Clock the circuit until the output reads 1111 (15 in decimal).
Start Challenge →Place resistors to form a voltage divider circuit, then export the SPICE netlist. Verify the output voltage matches the expected ratio.
Start Challenge →Coming soon — your best times and scores will be tracked here using local storage. Complete challenges to start building your record.