TinyOhms

Breadboard circuit simulator

Free · In-App Purchases · Designed for iPad. Not verified for macOS.

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, a zener holds its voltage, 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 for the voltages and currents that matter, or switch on All labels to see every one • 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. Every circuit you open tells you what it is and what to tap first, and "Try this" acts out its variants for you: press the button, darken the room, close the switch, and watch the numbers change. A library of more than 80 ready circuits takes you from a single LED to a light-following night light, a blinking timer, a pitch control you can hear, a zener voltage regulator, a MOSFET switch, a two-key lock built from NAND gates, and a traffic-light sequencer built from a 555 and a 4017 counter. Search it by name or part. 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 and the Android app too. Share a link to any circuit, or export it as a SPICE netlist or a 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, 3.3 V zener diode, DC motor, thermistor, piezo speaker, PNP transistor, 2N7000 MOSFET, the 555 timer, the CD4017 counter and the CD4011 NAND chip. 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/

Ratings & Reviews

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• Every circuit you open now starts with a card that says what it is and what to tap first. • Opened circuits get a tidy bar at the bottom: Inspect, Edit and Parts, one tap each. • Calmer readouts: inspect mode shows the numbers that matter, with an "All labels" switch for the rest. • Library circuits open clean, with the tips and parts picker out of the way until you want them. • A fresh board starts with the battery picked, so your first tap does something. • Sign-in only sends a code once your email address looks right.

Version 6.0.0

The developer, Adhish Technologies, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

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Accessibility

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Information

Provider
Adhish Technologies Private Limited
Size
1.9 MB
Category
Education
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • iPad
    Requires iPadOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 TinyOhms
  • Developer Website
  • Privacy Policy

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