Electro Sim vs Circuit Design & Simulation

Build a circuit. See current flow. Understand how it works. Electro Sim turns electronics into something you can explore on your iPhone or iPad. Place components, connect wires, and run a simulation to see how your circuit responds. Whether you are learning the basics, preparing a classroom demonstration, or testing an idea, start with a working example or build your own. BUILD ON A CANVAS OR A BREADBOARD Create schematic circuits with drag-and-drop components and flexible wiring, or try a virtual breadboard with components and jumper wires. Zoom in to make connections, rotate parts, and use undo and redo as you experiment. SEE WHAT CHANGES WHEN YOU CHANGE THE CIRCUIT Follow animated current flow, inspect voltage and current readings, and use a virtual multimeter to explore circuit behavior. Adjust component values, toggle switches, or advance the simulation one step at a time to connect cause and effect. LEARN THROUGH WORKING EXAMPLES Explore LED circuits, capacitor charging, logic gates, adders, counters, seven-segment displays, and traffic lights. Selected examples include guided steps that help you investigate the circuit and check your understanding. FIND THE PARTS YOU NEED Browse a searchable component library with resistors, capacitors, inductors, diodes, LEDs, transistors, switches, buzzers, logic gates, and signal sources. Component descriptions and pin information help you decide what to use and how to connect it. TURN CIRCUIT BLOCKS INTO REUSABLE MODULES With Pro, create custom components from circuit blocks, define their pins, and reuse them in new projects. Build up a collection of modules as your ideas grow. Custom component creation and use require an active Pro subscription. SAVE AND SHARE YOUR WORK Save projects to revisit later, exchange circuit files in JSON format, and export circuit snapshots or PDF reports with readings and notes for learning and discussion. Designed for iPhone and iPad, with light and dark appearances and English, Simplified Chinese, and Traditional Chinese interfaces. Start with one LED, then see where your curiosity takes you.

Take circuits off the page: draw them, power them up, then build them by hand. SCHEMATIC • Standard symbols: resistors, capacitors, diodes, LEDs, Zener diodes, transistors, relays, switches, motors, buzzers, sensors, logic gates, op-amps, 555 timers and more • Choose IEC or ANSI (US) symbol style • Snap-to-grid wiring; rotate, flip and swap parts in a tap; Apple Pencil support • Color themes and art styles; export crisp images of your schematic SIMULATION • Turn a schematic into a working simulation in one tap. A checklist points out missing values and wiring problems one by one • Moving green dots show current; blue numbers show the voltage at each node • Flip switches, press buttons, turn potentiometers, change light and temperature, and the circuit responds instantly • Watch capacitors charge and discharge, transistors amplify and switch, relays latch, logic gates oscillate and 555 timers count down • Oscilloscope for waveforms; record the current animation and export it as a GIF BREADBOARD • Realistic breadboard, battery box, components and chips: follow the schematic and plug them in step by step • Or build freely, picking parts from the parts list • Power it up to check your work: does the lamp light, does the motor turn? • Analog and digital multimeters measure voltage, current and resistance EXAMPLES 12 complete examples: basic circuit, capacitor charge and discharge, rectifier with filter and regulator, sensors and transistors, Darlington pair, transistor latch, three-person voting circuit, logic-gate oscillator, relay motor reversing, op-amp oscillator, 555 oscillator and 555 timer. Each comes as a schematic, a simulation and a breadboard, and you can change anything. To keep your changes, save it as your own circuit. EVERYDAY USE • Syncs between iPad and iPhone through iCloud • Share a link and anyone can open your circuit in a web browser • No sign-up, no ads, no personal data collected • English and Chinese Great for physics and technology classes, electronics hobbyists and makers, and teachers demonstrating in class. MEMBERSHIP Free forever: drawing and exporting schematics, plus everything in the 12 examples (including their simulations and breadboards). Membership unlocks: simulating circuits you draw yourself, the breadboard for your own circuits, and art styles. • Yearly membership: auto-renewing subscription, billed yearly • Lifetime membership: one-time purchase Both support Family Sharing. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours before the end of the period. Manage or cancel in Settings → Apple Account → Subscriptions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://saviteachingassistant.cn/circuit/privacy-en.html