UCircuit vs TinyOhms

UCircuit — Your First Engineering Lab UCircuit is a playful, visual learning app that turns electricity into something children can touch, move, and understand in seconds. Designed as a first engineering lab, UCircuit helps young learners — including parent-guided early learners — explore how circuits work through safe, interactive play. What UCircuit is: • A guided circuit playground where children build simple and advanced circuits step by step • A safe, no-login, no-account experience focused entirely on learning and creativity • A bridge between play and engineering thinking: cause and effect, logic, sequencing, and problem-solving What kids can do: • Start with a beginner-friendly first lab: Battery + Bulb + Switch • Instantly see how circuits open, close, and flow • Explore interactive labs across multiple themes and difficulty levels • Learn by experimenting — animated feedback clearly shows what works and what needs fixing • Earn badges, save favorites, and build confidence through progress Why UCircuit works for young learners: • Clear visual language and simple, intuitive interactions • Fast feedback loops — children see results immediately • Designed for guided parent–child learning • Encourages curiosity and experimentation without fear of “breaking” anything Pro Unlock: The free experience includes the first core lab. A one-time Pro unlock opens all additional guided labs and the Open Lab Builder for fully custom experiments. No subscriptions. Learn at your own pace. Our mission: UCircuit aims to be the best early engineering companion, making electricity intuitive, fun, and confidence-building from the very first interaction.

TinyOhms opens straight onto a breadboard. Drop in a battery, a resistor and an LED, and the circuit runs the moment the loop closes. Current flows along the wires as moving chevrons, the LED glows brighter or dimmer with the real numbers, and if you push too much current through it, it pops. Nothing to install, nothing to solder, nothing to break. REAL PARTS, REAL MATH Every component behaves like the one in the drawer: resistors follow Ohm's law, LEDs have a forward voltage, transistors amplify, capacitors charge and drain, and the 555 timer ticks at the frequency its resistors and capacitor set. Under the hood is a full circuit solver (the same kind of nodal analysis SPICE uses), so the readouts are the ones you would measure with a meter. SEE WHAT IS HAPPENING • Live current flow on every wire, with direction and strength • Inspect mode: tap the eye to read every node voltage and branch current • A built-in scope that traces voltages over time — watch a capacitor charge, or a 555 output square wave • Real sound: buzzers beep and piezo speakers play the pitch the circuit sets • Room-light and temperature sliders to drive light sensors and thermistors • Short-circuit and overload warnings before anything "burns" BUILT FOR LEARNING TinyOhms is made for teens and any complete beginner. There is no lesson to sit through: build, watch, change one thing, and see what happens. Twenty ready circuits take you from a single LED to a light-following night light, a blinking timer, a one-shot pulse, a pitch control you can hear, and a traffic-light sequencer built from a 555 and a 4017 counter. YOUR OWN LIBRARY Sign in with just your email (a code, no password) to save circuits to your library and open them on the TinyOhms website Workbench too. Export any board as a SPICE netlist or share the board file. ON THE BENCH Free: wire, jumper, batteries (3 V, 4.5 V, 9 V), resistor, LED, switch, push button, buzzer, light sensor (LDR) and NPN transistor — everything the beginner projects need. TinyOhms Pro (optional monthly subscription): potentiometer, capacitor, 1N4001 diode, DC motor, thermistor, piezo speaker, the 555 timer and the CD4017 counter. Circuits from the library always open in full, whether or not you subscribe. TinyOhms Pro renews monthly until cancelled in Settings › Apple Account › Subscriptions. Under 18? Ask a parent first. Terms: https://tinyohms.com/terms/ Privacy: https://tinyohms.com/privacy/ No ads, no tracking, no analytics. Just electrons.