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Screenshots

  • PROTO - circuit simulator screenshot 1
  • PROTO - circuit simulator screenshot 2
  • PROTO - circuit simulator screenshot 3
  • PROTO - circuit simulator screenshot 4

About PROTO - circuit simulator

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!

* PLEASE KEEP IN MIND THAT THIS APP IS IN ALPHA STAGE :) *
* You can report an issue or make component request at https://github.com/Proto-App/Proto-Android/issues *

Features:
+ Animations of voltage values and current flows
+ Adjusts circuit parameters
+ Oscilloscope
+ Single play/pause button to control simulation

Components:
+ DC, AC, Square, Trinagle, Sawtooth, Pulse, Noise voltage source
+ Current source
+ Resistors
+ Potentiometer
+ Capacitors
+ Inductors
+ Transformers
+ Diodes (rectifying diode, LED, Zener, Schottky)
+ Transistors (NPN, PNP, N and P channel Mosfet)
+ Switches (SPST, Relay)
+ Bulb
+ Operational amplifier
+ Timer 555 (NE555)
+ Digital (AND, NAND, OR, XOR, NOR, Inverter)
+ Voltmeter
+ Ammeter
+ Fuse
+ Photoresistor (uses phone light sensor)
+ Analog-to-digital converter (ADC)
+ Accelerometer (uses phone accelerometer sensor)
+ FM source
+ Logic Input

What’s new

Version 1.51.0 · Updated September 11, 2026

• New CMOS logic ICs: 4008 adder, 4024 counter, 4027 flip-flop, 4077 XNOR • New in-app datasheets for TTL and CMOS logic ICs • New Screen margin setting for devices with rounded corners • Bug fixes and stability improvements

Frequently asked questions

What is PROTO?
PROTO is a real-time electronic circuit simulator that allows users to set up and simulate the behavior of electronic circuits.
What can I do during simulation in PROTO?
During simulation in PROTO, you can check voltages, currents, and many other variables. You can also check signals on a multichannel oscilloscope and tune your circuit in real time.
Is PROTO still in development?
Yes, PROTO is currently in its alpha stage of development.
How can I report an issue or make a component request for PROTO?
You can report an issue or make a component request for PROTO at https://github.com/Proto-App/Proto-Android/issues.
What are the features of PROTO?
The features of PROTO include animations of voltage values and current flows, the ability to adjust circuit parameters, an oscilloscope, and a single play/pause button to control the simulation.
What components are available in PROTO?
PROTO offers a wide range of components, including voltage sources such as DC, AC, Square, Triangle, Sawtooth, Pulse, and Noise sources. It also includes current sources, resistors, potentiometers, capacitors, inductors, transformers, diodes (rectifying diode, LED, Zener, Schottky), transistors (NPN, PNP, N and P channel Mosfet), switches (SPST, Relay), bulb, operational amplifier, timer 555 (NE555), digital components (AND, NAND, OR, XOR, NOR, Inverter), voltmeter, ammeter, fuse, photoresistor (uses phone light sensor), analog-to-digital converter (ADC), accelerometer (uses phone accelerometer sensor), FM source, and logic input.

Alternatives to PROTO - circuit simulator

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