Circuit Simulator - Voltz

Voltz is an electronic circuit simulator made for your phone. Drag parts onto a grid, wire them with your finger and press Run: current dots start flowing, wires light up by voltage and every reading updates in real time. No account, no ads, and your first circuit simulation is one minute away.

Build circuits by touch

• Drag parts anywhere without fighting the canvas

• Wires snap to the grid and bend into neat right angles

• Rotate, flip, duplicate and delete in one tap, with undo and redo

• Type values the way engineers write them: 4.7k, 10u, 2.2m

A real circuit simulator, in real time

• A real solver (modified nodal analysis) runs on your device, like a SPICE simulator for your pocket

• Animated current dots show where current flows and how fast

• Wire colours show voltage: green for positive, red for negative

• Flip switches, press buttons and turn potentiometers while the circuit simulator runs

Measure everything

• Tap any part to see its voltage, current and power

• Voltmeter, ammeter and ohmmeter parts

• Built-in oscilloscope: plot voltages and currents over time (2 channels free, 4 with Pro)

85+ components

• Sources: DC, AC, battery, function generator, current source, PWM

• Passive: resistor, potentiometer, capacitor, inductor, transformer, fuse

• Sensors: light sensor (LDR), thermistor, solar cell, photodiode

• Switches, push buttons, relays and an analog switch

• Semiconductors: diodes, LED, bridge rectifier, NPN and PNP transistors, MOSFETs, JFETs, SCR, optocoupler

• ICs: op-amp, comparator, 555 timer, voltage regulators, DAC and ADC

• Digital logic: gates, latches, flip-flops, counters, shift register, adder, mux, 7-segment display

• Outputs: lamp, buzzer, speaker, DC motor, servo, RGB LED

Learn electronics by doing

• 25 ready-made circuits, each with a short lesson

• Ohm's law, voltage dividers, RC charging, filters, rectifiers, transistor switches, op-amp amplifiers, logic gates and flip-flops, plus a 555 LED blinker

• Every lesson ends with a "try it" challenge: change one value and watch what happens

• A circuit simulator that fits a physics class, an electronics course or your first Arduino projects

Ask AI about your circuit

Stuck on your own design? No other circuit simulator answers questions about the circuit you have open. The AI reads your parts, values and live readings and explains how the electronic circuit works, what each part does or why it is not working.

Community

Share your circuits with other makers, browse popular and new designs, like them and open any of them in your circuit editor to remix.

Save and share

• Circuits are saved on your device

• Share circuits as .volt files or publish them to the Community

• Export a clean PNG of your schematic for homework or notes

Made for students, makers and teachers

Electronics and physics students use Voltz as a virtual electronics lab and logic gate simulator. Makers test an idea on a breadboard simulator before soldering. Teachers project a live electric circuit instead of a static diagram. On a phone or tablet, a touch circuit simulator beats a desktop port every time.

Voltz Pro

Voltz includes all the basic parts, up to 5 saved circuits, 2 oscilloscope channels, the first lessons and 3 AI questions at no cost, with no ads. Pro unlocks advanced parts, unlimited saved circuits, 4 oscilloscope channels, every lesson and up to 100 AI questions a day. Pro is a monthly or yearly subscription; the yearly plan starts with a trial. Subscriptions renew automatically unless cancelled at least 24 hours before the period ends.

Download Voltz, the touch-first circuit simulator, and run your first circuit today.

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