LogicalArt vs DLD

LogicalArt is a digital logic simulator where you build a computer from nothing but logic gates. Wire NOT, AND, OR and XOR gates, switch on the power, and watch every signal travel through your circuit. No breadboards, no soldering, no tangled jumper wires. Just the ideas behind how a CPU really works, made visible on your iPhone, iPad and Mac. LEARN BY BUILDING: GUIDED CHALLENGES Work up a ladder of hands-on puzzles: Half Adder, Full Adder, Multiplexer, Decoder and a 1-Bit ALU. Label your inputs and outputs, tap Verify, and LogicalArt plays the whole truth table on your live circuit, row by row, so you see exactly where it works and where it doesn't. FROM GATES TO A CPU • Four basic gates: NOT, AND, OR, XOR. Everything else is built from them. • Package any circuit into a reusable chip, then build bigger designs out of your own chips. • Create EEPROM chips straight from a truth table. • Build latches, flip-flops, registers, counters, adders and an ALU, step by step toward your own 8-bit computer. SEE WHAT YOUR CIRCUIT IS DOING • Deterministic simulation with real gate delay, so clocks, latches and feedback loops behave the way they should. • Clock inputs, number displays and a live view of every wire's state. • Waveform view to follow signals over time. MADE FOR TOUCH, TRACKPAD AND MOUSE • Drag to place gates and draw wires; pinch, scroll and zoom around large boards. • Undo, labels and a clean layout that stays readable as your designs grow. • Native on iPhone, iPad and Mac. SHARE AND DISCOVER Browse boards from other builders and share your own. WHO IT'S FOR Computer science and electrical engineering students, teachers explaining digital logic, programmers curious about what happens below assembly and Verilog, and anyone who has ever wondered how a computer actually works. FULL ACCESS Start for free. A one-time Full Access purchase unlocks every feature: unlimited boards, chip packaging, EEPROM chips and sharing. No subscription required. Enjoying LogicalArt? A rating on the App Store helps more people discover it.

DLD is a digital logic design and circuits workbench for your phone. Drop gates onto the bench, wire them together, flip a switch, and watch the signal travel through the circuit in real time. Built for students working through a digital logic design course — and for anyone who wants to see Boolean algebra actually do something. BUILD ANYTHING • 28 components: switches, clocks, Vcc and ground, every standard gate, tri-state buffers, multiplexers, flip-flops, displays and probes • Gates take 2 to 8 inputs — one wide NAND instead of three cascaded ones • Tap a component to reach its settings: input count, clock speed, colour • A work bench far bigger than the screen, with pan, zoom and fit-to-circuit SEE IT WORKING • Current animates along every live wire, so you can follow a signal • LEDs, LED bars, 7-segment and hex displays light up as the circuit runs • A school bell that rings for as long as it has current • Logic probes read out 1 or 0 anywhere you wire one UNDERSTAND IT • Boolean equations written out from whatever you have drawn • A full truth table generated from your circuit, ready to copy out • Conflicting drivers on a net are flagged rather than quietly wrong • A tutorial section covering every gate symbol and its truth table KEEP YOUR WORK • Save and reopen as many circuits as you like • Undo and redo everything • Recolour wires, lamps and blocks however you want to read them COMPONENTS Switch · Clock · Vcc · GND · AND · OR · NOT · NAND · NOR · XOR · XNOR · Buffer · Tri-state buffer · Tri-state NOT · MUX · DEMUX · D flip-flop · T flip-flop · JK flip-flop · Virtual links · LED · LED bar · 7-segment · Hex display · Bell · Probe · Label PRIVATE BY DEFAULT No account. No sign-in. No analytics. No ads. Nothing leaves your device — your circuits are saved on the phone and nowhere else. The app works with no network connection at all.