PROTO - circuit simulator icon

PROTO - circuit simulator v1.45.0

• In-app purchases

PROTO - circuit simulator screenshot 0 PROTO - circuit simulator screenshot 1 PROTO - circuit simulator screenshot 2 PROTO - circuit simulator screenshot 3 PROTO - circuit simulator screenshot 4 PROTO - circuit simulator screenshot 5 PROTO - circuit simulator screenshot 6 PROTO - circuit simulator screenshot 7 PROTO - circuit simulator screenshot 8 PROTO - circuit simulator screenshot 9 PROTO - circuit simulator screenshot 10 PROTO - circuit simulator screenshot 11

About this app

Developer Description

Build, simulate and learn about electronic circuits with PROTO circuit simulator

Are you looking for tools like Multisim, SPICE, LTspice, Proteus, Altium or PhET simulations? That's great! PROTO is an real time electronic circuit simulator which means you are able to setup a circuit with various components and simulate behaviour of the electronic circuit ⚡
During simulation you can check voltages, currents and many other variables. Check signals on multichannel oscilioscope and tune your circuit in real time! Our app can greatly help with your Raspberry Pi, Arduino or ESP32 project. You can also use PROTO as logic circuit simulator and perform digital electronic analysis!

ℹ️ You can report an issue or make component request at Github

👉 Features:
✅ Animations of voltage values and current flows
✅ Adjusts circuit parameters (like voltage, current and other)
✅ Four-channel oscilloscope
✅ Single play/pause button to control simulation
✅ Copy electronic components
✅ Learn about electronic circuits by examples in app
✅ Share circuit with friends
✅ Themes (Dark, Light, Ocean, Solarized)
✅ PNG, JPG, PDF circuit export
✅ Export workspace
✅ Video tutorials about electronics
🔥 Arduino support in future

👉 Components:
+ DC, AC, Square, Trinagle, Sawtooth, Pulse, Noise voltage source
+ Current source
+ Resistor
+ Potentiometer
+ Capacitor
+ Polarized capacitor
+ Inductor
+ Transformer
+ Diode (rectifying diode, LED, Zener, Schottky)
+ Transistor (NPN, PNP, N and P channel Mosfet)
+ Switches (SPST, Relay)
+ Bulb
+ Operational amplifier
+ Timer 555 (NE555)
+ Digital Gates (AND, NAND, OR, XOR, NOR, NXOR, Inverter)
+ Voltmeter
+ Ammeter
+ Fuse
+ Photoresistor (uses phone light sensor)
+ Analog-to-digital converter (ADC)
+ Accelerometer (uses phone accelerometer sensor)
+ FM source
+ Logic Input
+ Memristor
+ Logic output
+ Probe
+ Voltage rail

👉 Analog Pack:
+ Tunnel diode
+ Varactor
+ NTC Thermistor
+ Center tapped transformer
+ Schmitt trigger
+ Schmitt trigger (inverting)
+ Solar cell
+ TRIAC
+ DIAC
+ Thyristor
+ Triode
+ Darlington NPN
+ Darlington PNP
+ Analog SPST
+ Analog SPDT
Digital Pack:
+ Adder
+ Counter
+ Latch
+ PISO Register
+ SIPO Register
+ Seven segment decoder
+ Sequence generator
+ D Flip-flop
+ T Flip-flop
+ JK Flip-flop
+ Multiplexer
+ Demultiplexer
+ Voltage controlled current source (VCCS)
+ Voltage controlled voltage source (VCVS)
+ Current controlled current source (CCCS)
+ Current controlled voltage source (CCVS)
+ Optocoupler

👉 Misc Pack:
+ Wobbulator
+ AM Source
+ SPDT Switch
+ Digital to analog converter (DAC)
+ Antenna
+ Spark gap
+ LED Bar
+ 7 segment LED
+ RGB LED
+ Ohmmeter
+ Audio input
+ Microphone
+ Device battery
+ DC Motor
+ 14 segment LED
+ Diode bridge
+ Crystal
+ Voltage regulators (78xx family)
+ TL431
+ Buzzer
+ Frequency meter

👉 JavaScrip Pack:
+ Write code
+ JavaScript interpreter (ES2020 class)
+ Access to IC inputs in code
+ Access to IC outputs in code
+ Four custom ICs

👉 7400 TTL Pack:
+ 7404 - hex inverter
+ 7410 - triple 3-input NAND Gate
+ 7414 - hex Schmitt-trigger inverter
+ 7432 - quadruple 2-input OR gate
+ 7440 - dual 4-input NAND buffer
+ 7485 - 4-bit magnitude comparator
+ 7493 - binary counter
+ 744075 - triple 3-input OR gate
+ 741G32 - single 2-input OR gate
+ 741G86 - single 2-input XOR gate

👉 4000 CMOS Pack:
+ 4000 - dual 3-input NOR gate and inverter.
+ 4001 - quad 2-input NOR gate.
+ 4002 - dual 4-input NOR gate.
+ 4011 - quad 2-input NAND gate.
+ 4016 - quad bilateral switch.
+ 4017 - 5-stage Johnson decade counter.
+ 4023 - triple 3-input NAND gate.
+ 4025 - triple 3-input NOR gate.
+ 4081 - quad 2-input AND gate.
+ 4511 - BCD to 7-segment decoder.

👉 Sensors pack:
+ Pressure
+ Gyroscope
+ Light
+ Magnetic field
+ Proximity
+ Temperature
+ Humidity

What's New

> New component [TTL PACK]: 74283 - 4-bit binary full adder with fast carry.
> Fix top bar UI issue on Android 16 - https://github.com/Proto-App/Proto-Android/issues/437

In-app purchases

$2.99 - $19.00 per item

Version Information

Version
1.45.0
Downloads
1M+
Updated on
Dec 18, 2025
Released
Oct 25, 2021
Requires
Android 6.0

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PROTO - circuit simulator users say on Google Play

★★★★★
Thomas White Thomas White

I use it almost every day. Works great. I paid for the full app and don't regret it. Word to the wise- dont obsess over circuits. There is more to life than electronics! lol Suggestions for the devs: I would like to see my saved circuits appear across all my devices and would love a feature that would let me capture or scan an image of a schematic and copy it into Proto. More parameters for discrete components would be useful as well. thanks to the devs. keep up the good work.

25 Oct 26, 2025
★★★★
George Broughton George Broughton

The user interface feels a little clunky to use. long holding something should allow you to drag it. It's great for learning electronics, but the lack of frequency control for AC supplies and lack of AC components other than inductors and non polarized capacitors really has me wanting more. When i train guys in the workplace i really rely on visual aids to show people what's happening inside wires when data or power is being sent somewhere. It just lacks important components to be of use.

17 Aug 21, 2025
★★★
Brendon Steenkamp Brendon Steenkamp

Would give it a 5, but there is minimal support and a community page with shared circuits would be a great addition to the app for users who have bought some add-ons. And for some or other reason when I select to change a parameter of a component, it zooms quite deep into the circuit, which annoys me because when I zoom out again I move the selected component. It would be fine if it does not do the zooming at all

2 Sep 28, 2025
★★
Leopy Periz Leopy Periz

A bit more stable than EveryCircuit, but not by much. Uninstalling because after a circuit reported "unable to solve", no matter what I did I could never revert back to when it worked. A lot of time wasted. Also, the lack of wire autorouting and the precision with which you need to select wires and components is extremely frustrating. Also, why can't I connect a wire to another one, unless there is already a junction?!

5 Sep 7, 2025
Imelda Valerio Imelda Valerio

Bro i need help so bad, please respond to me as soon as possible, i made a 4 bit cpu, when i tested, it worked fine, and then i saved and left and joined back again, when suddenly, i saw everything is just 0 OFF or brown. I couldn't do anything to save it, it was so hard to make it, please fix it, everything is brown even wires, not green,, 0 not 1, i used digital logic components

5 Aug 9, 2025

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