LOGICS is a browser workbench for combinational logic. Write a Boolean expression and watch it become a truth table, a K-map, a minimized circuit, a breadboard plan and a real TTL chip layout — and when you'd rather be tested than taught, it forges exam-style word problems and walks you through solving them.
Sign in to use the benches — or create a free account. Your designs stay on your computer.
There is only ever one function F. Write it, and the truth table, the map, the gate network, the breadboard plan and the chip layout are all the same thing seen from a different side — change any one of them and the rest follow.
Expression → truth table → K-map → schematic, live.
A full decoder build, end to end.
Your design as actual 74-series ICs.
The Problem Forge is the other half of learning logic design, and it works the opposite way round: it writes the question, hides the variables among things that only look like signals, and marks your answer step by step. Nothing carries over from the benches — you start from a blank page, the way a quiz starts.
Exam-style word problems with distractors planted in the prose. You pick the real signals.
A greenhouse controller runs the exhaust fan when the heater is on and the vents are closed, or whenever the humidity alarm trips. The controller sits beside the blue watering can.
This is what the Problem Forge gives you. The walkthrough marks each step as you go, so you see exactly where a solution went wrong.
Explore Problem Forge →A greenhouse controller switches on the exhaust fan when the heater is running and the roof vents are closed, or whenever the humidity alarm trips. The controller box is painted blue, sits beside 40 tomato plants, and is checked by the caretaker every morning. Design the logic for the fan.
In the Forge the answer stays hidden until you've worked it — and the answer key is always free.
The fan is the output. Only three things decide it — the paint, the plants and the caretaker are scenery and change nothing.
Pick your own letters. The walkthrough follows your naming through every later step.
Rewrite each clause as a condition on your variables. "Vents closed" means V = 0.
Three inputs means 2³ = 8 rows. Mark F on each one.
Every row where F = 1 is a minterm. Together they give the unsimplified sum of products.
Circle the largest groups of 1s. Four cells give M; two cells give HV'.
Each group becomes one product term. Five terms collapse to two.
One inverter makes V', one AND makes HV', and one OR adds M.
Draw it the way the question asks. Your answer is tested on all 8 input rows, not matched to our wording — called it C for "vents closed"? F = M + HC passes too.
Late-night lab sessions or a bright classroom projector.
Open it in a browser and start typing.
They are saved on your computer; your account holds only your email and plan.
Seeded work: one number gives the whole class the identical problem.
When you run it locally, designs save straight to your drive.
Taking a digital logic course — working homework, quizzes and lab projects.
Plan it before touching a breadboard: chip count, package list, wiring plan, current draw.
An endless supply of quiz-shaped problems with worked answer keys. Share one seed and the whole class gets the identical problem.
seed 48213Hobbyists coming to digital logic from electronics or software.
The tools stay usable — they just stop growing. Every plan starts with a free account, and Pro follows it to any device you sign in on.
Semester is the best value — ₱699 costs about as much as 3½ months of Monthly.
Everything you need to learn the method, within the limits above.
7 days of Pro for exam week or one lab report. One payment, no renewal.
Billed monthly. Cancel anytime.
One payment, Pro until the term ends. Nothing to cancel.
A pair pays ₱98, ₱20 less than two weekly passes.
A pair pays ₱318, ₱80 less than two monthly plans.
A pair pays ₱1,098, ₱300 less than two semester unlocks.
Instructors and TAs: [INSTRUCTOR TERMS]
Nothing you've placed is hidden, greyed out or deleted. An older 9-IC design still opens and still works — you just can't add a tenth.
The walkthrough, the answer key and the method guide are always free. You'll never pay to see the solution to a problem LOGICS just set you.
Sign in once and all four benches are open. Your plan goes with you to any device you sign in on.
Open the bench in your browser. No install — just sign in, or create a free account.