About 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...
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. Save time and check your circuits before final pcb design. 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
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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
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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
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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
Previous Versions
Here you can find the changelog of PROTO - circuit simulator since it was posted on our website on 2021-04-22 19:44:42.
The latest version is 1.52.0 and it was updated on 2026-10-17 01:20:18. See below the changes in each version.
PROTO - circuit simulator version 1.52.0
Updated At: 2026-10-10
Changes: • New CMOS logic ICs: 4518 (dual BCD counter) and 4520 (dual 4-bit binary counter)
• New Script IC with 32 inputs and 32 outputs
• PROTO is now available in French
• Bug fixes and stability improvements
PROTO - circuit simulator version 1.50.0
Updated At: 2026-09-11
Changes: • New TTL logic ICs: 7400 (quad 2-input NAND) and 7408 (quad 2-input AND) gates
• New CMOS logic IC: 4069 hex inverter
• Fixed a freeze during the oscilloscope scope check
• Fixed a crash when opening circuits with an unknown component
• Android 17 support
• Bug fixes and stability improvements
PROTO - circuit simulator version 1.51.0
Updated At: 2026-09-11
Changes: • 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
PROTO - circuit simulator version 1.49.1
Updated At: 2026-06-25
Changes: • Move and drag multiple components at once
• Easier wiring with improved terminal selection
• Smoother zoom in/out
• New examples: comparator and XOR gate
• Android 16 support
• Bug fixes and stability improvements
• Fix slow simulation start (1.49.1)
PROTO - circuit simulator version 1.48.0
Updated At: 2026-06-10
Changes: > Add ability to print circuit directly from PROTO [Actions -> Print circuit]
> Add ability to share circuit via Gmail, Whatsapp, Facebook and more [Actions -> Share circuit]
> Fix wrong TTL 7402 pinout: https://github.com/Proto-App/Proto-Android/issues/450
> Fix wrong zoom behavior: https://github.com/Proto-App/Proto-Android/issues/449
PROTO - circuit simulator version 1.47.0
Updated At: 2026-02-16
Changes: > Unify Import/Export/Theme into Actions button.
> Add "Save as" option
> Add ability to rename circuit during simulation
> Add Changelog button to see PROTO releases history
PROTO - circuit simulator version 1.46.0
Updated At: 2026-01-13
Changes: > New component [MISC PACK]: AMS1117 voltage regulators:
- AMS1117-1.2
- AMS1117-1.5
- AMS1117-1.8
- AMS1117-2.5
- AMS1117-3.3
- AMS1117-5.0
> Wrong corners on Galaxy S23+ - https://github.com/Proto-App/Proto-Android/issues/439
PROTO - circuit simulator version 1.45.0
Updated At: 2025-12-18
Changes: > 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
PROTO - circuit simulator version 1.44.0
Updated At: 2025-11-28
Changes: > Tooltips - you can assign custom tooltip for each component in simulation
> Reorganized PROTO menu
> Optimized simulation speed by 10%
> Try to fix JavaScript crashes on devices:
- Redmi A3
- Infinix SMART 9
- Itel itel A50
PROTO - circuit simulator version 1.43.0
Updated At: 2025-11-28
Changes: > Thank you for your support and for completing the PROTO survey! We've gathered a ton of new ideas.nnYou can check out the survey results on our website (BLOG section).
> We have decided to make the themes and CMOS component [CD 4019] available for free! Enjoy!