Daily puzzles for logic, circuits, RF and control
A new puzzle every day in each game, with Easy, Medium and Hard levels and unlimited practice.
Digital Logic
Transistors, K-maps, gates and Boolean algebra.
CMOrdle
Build the CMOS gate: pull-up, pull-down, no shorts.
K-mordle
Circle the K-map: find the minimal SOP.
Gatordle
Find the hidden gates that make the circuit match its truth table.
Boolordle
Simplify it law by law: hit par.
Decordle
Wire decoder outputs into one gate to build F.
Circuits 1
Resistor networks, node voltages, Thévenin and transients.
Reqordle
Reduce the network to one resistor.
Kirchordle
Find every node voltage. KCL checks your guess.
Thevenordle
Measure the box or analyze the circuit: find its Thévenin twin.
Scopordle
Match the trace on the scope: RC, RL and RLC transients.
Circuits 2
AC circuits, phasors and frequency response.
Phasordle
Solve an AC circuit with phasors.
Impedordle
Probe a sealed box with an LCR meter; name what's inside.
Wattordle
Read the scope, build the power triangle, fix the power factor.
Bodordle
Sketch the Bode plot of a transfer function.
RF & Microwave
NewSmith charts, link budgets, mismatch and filters.
Smithordle
Read the chart, name the load.
Linkordle
Follow the dBs from transmitter to receiver.
Swrordle
One mismatch, five ways to say it.
Filtordle
Name the filter from its sweep.
Matchordle
Match the load to the line.
Control Systems
NewFeedback, stability and system response.
Blockordle
Fewest moves to one block: reduce the diagram, then write T(s).
Stepordle
Read the step response; match the specs, then the PID gains.
Routhordle
Fill the Routh array; count the unstable poles.
Locusordle
Probe the s-plane; pin down the root locus.
Marginordle
Find the crossovers; read the margins.