Ohmira vs PLC Ladder Logic Simulator

Ohmira turns electronics into something you can see. Place real components on a grid, wire them together, press Run, and watch voltage colour the wires while moving dots show you where the current goes. No account. No ads. Nothing to sign up for. BUILD IT Drag a part onto the grid and drag between terminals to wire it. Parts snap to the grid, wires route themselves around what is in the way, and every action can be undone. Tidy a messy circuit with one tap and it redraws itself as a schematic: the source standing up on the left, the ground at the bottom. OBSERVE IT Run the circuit and it stays live. Wires take the colour of their voltage, from grey at 0 V to indigo at the supply. Dots travel along them at the speed of the current. Tap any part to read its voltage, its current and its power, or pin the readings to the canvas and watch them change as you edit. LEARN IT Thirty exercises, in three tiers, from Ohm's law to a regulated power supply. Each one gives you a brief and then checks the circuit you actually built, not a multiple-choice question about it. When it fails, it tells you why in words about your circuit: a part missing, a value wrong, a node left unwired, a reading that came out too low. WHAT IS IN THE BOX • 43 components: sources, batteries, resistors, capacitors, inductors, potentiometers, diodes, LEDs, Zeners, transistors, MOSFETs, an op-amp, bridge rectifiers, regulators, a transformer, relays, lamps, motors, buzzers, thermistors, photoresistors, and probes • DC analysis and a transient simulation that draws real waveforms • A single-channel oscilloscope with a 1-2-5 timebase, mean and peak-to-peak • Ten starter circuits, from a single loop to a MOSFET stage • Annotated zones for labelling parts of a circuit • Import and export as a file, and private iCloud sync between your iPhone and iPad MADE FOR IPHONE AND IPAD A workspace on iPad with floating panels, an Apple Pencil and a pointer welcome, keyboard shortcuts, and a canvas-first layout on iPhone. Full VoiceOver labels, Dynamic Type, Reduce Motion, Increase Contrast, and colour-blind indicators. Colour is never the only thing that carries meaning. PRIVATE BY DESIGN Your circuits live on your device. iCloud sync, if you want it, uses your own private database, never an account of ours and never a shared server. Ohmira collects no data, contains no analytics, and tracks nothing. There is no backend to leak. FREE, AND WHAT IS NOT Ohmira is free, with no time limit and no cap on how many circuits you keep. The free app includes the whole editor, fifteen fundamental parts, the full DC simulation, iCloud sync, import and export, the first ten exercises, and six starter circuits. Ohmira Complete is one purchase, with no subscription and shared with your family. It adds the other 28 components, the remaining 20 exercises, and the oscilloscope. Ohmira is a teaching simulator, not a SPICE replacement: it is built to make circuits understandable, not to certify a design for manufacture.

Learn PLC ladder logic programming from scratch with PLC Ladder Learn — an animated, hands-on simulator built for engineering students, technicians, and anyone new to industrial automation. No expensive software, no real hardware needed. Open the app and start building and simulating real PLC ladder diagrams right on your iPhone or iPad. ANIMATED LESSONS Every concept is taught with moving visuals. Watch timers count up, contacts open and close, current flow through the rung, and circuits operate step by step. You learn ladder logic with your eyes — not dry text. LIVE LADDER SIMULATOR (SANDBOX) Build your own ladder diagrams and run them in real time: • Place contacts (NO/NC), coils, SET/RESET, timers and counters • Toggle inputs and watch outputs respond instantly • Series (AND), parallel (OR) and combined logic • Live signal graph (oscilloscope) to trace bits and values • Undo/redo, address suggestions and custom labels 50 REAL-WORLD PROBLEMS Solve graded automation problems from easy to hard: motor start/stop, burglar alarm, automatic door, conveyor control, mixing reactor, star-delta starter, paint booth airlock and many more. Your ladder solution is checked automatically, and selected problems show the real process animated live while your program runs. WHAT YOU'LL LEARN • Ladder logic & ladder diagram basics • Normally Open / Normally Closed contacts and output coils • Addressing (I, Q, M, DB) and the PLC scan cycle • Timers — TON, TOF, TP • Counters — CTU, CTD • Memory bits, latching, SET/RESET • Positive / negative edge detection • Comparison, MOVE and math instructions • Analog I/O — 4-20 mA, scaling, PID basics • FC / FB blocks and program structure • Industrial communication — RS-485, PROFIBUS, PROFINET, Modbus QUIZZES & PRACTICE Reinforce every lesson with quizzes and guided exercises. Earn XP and track your progress as you learn. WHO IS THIS FOR? • Engineering & vocational students (electrical, mechatronics, automation) • Technicians and maintenance staff • Career changers moving into PLC programming • Anyone learning Siemens S7 / TIA Portal concepts or preparing for an automation job WHY PLC LADDER LEARN • Learn by doing — build and simulate, don't just read • Beginner-friendly, step-by-step path • Works fully offline, anytime • English, Turkish and Portuguese supported PLC Ladder Learn is free to start. Unlock Premium once (lifetime — no subscription) for advanced lessons, all 50 problems, unlimited simulator rungs and advanced instructions, and unlimited graph channels. Download now and go from zero to confident PLC ladder logic programming. Note: This is an independent educational tool, not affiliated with or endorsed by Siemens. "S7", "PROFIBUS" and "PROFINET" are referenced for educational purposes only.