iCircuit 1.16
iCircuit is the premier iPhone and iPad app for designing, simulating, and learning analog and digital electronics.
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About iCircuit
iCircuit is the premier iPhone and iPad app for designing, simulating, and learning analog and digital electronics. Its advanced simulation engine provides real-time, always-on analysis so your circuits stay powered and live, just like working with real components.
Use it like a CAD tool: add components, wire them up, and set their properties. But iCircuit is unlike typical CAD apps because it is always simulating. You do not stop to take a measurement or spend time configuring reports. Instead, you just play with the circuit as you normally would, with the power on.
Build circuits with over 300 components, from simple resistors and LEDs to programmable Arduinos (Uno, Nano, Mega, ESP8266, ESP32), Raspberry Pi Pico boards running real MicroPython and CircuitPython, PIC microcontrollers, and 60 4000/7400-series digital ICs (more available with Pro). Connect elements, adjust values, and instantly see the results.
BUILT-IN TEST EQUIPMENT
• Multimeter: Probe any point to read voltage, current, and power
• Oscilloscope: Track multiple signals with touch-controlled time scale, stacked/unstacked views, FFT analysis, and Bode plots
• Gauges: Visualize voltages, currents, and frequencies directly in your circuit
• Signal generators and configurable sources
EXTENSIVE COMPONENT LIBRARY
• Raspberry Pi Pico and Pico 2 running genuine MicroPython and CircuitPython firmware
• Programmable Arduinos (Uno, Nano, Mega, ESP8266, ESP32)
• Programmable PIC microcontrollers (assembly and HEX files, more available with Pro)
• Power: Voltage regulators (78xx, LM317), sources, dependent sources, power jacks, and simulated antennas
• Analog: Resistors, capacitors, inductors, diodes, BJTs, MOSFETs, thermistors, triodes, and tetrodes
• Digital: Logic gates (AND, OR, NAND, NOR, XOR), JK and D flip-flops, and 60 4000/7400-series ICs (180+ available with Pro)
• ADCs and DACs
• Sensors and displays: LEDs, 7-segment, NeoPixels, matrix displays, thermistors
• Electromechanical: Motors, servos, SPST/SPDT and DPST/DPDT switches, push buttons, relays, and speakers
SPICE, VERILOG, AND VHDL
Import vendor SPICE models and subcircuits and use them as components. Write Verilog or VHDL in the HDL element and wire it to the rest of your circuit.
CREATE CUSTOM ELEMENTS
Build sub-circuits and custom elements to componentize your designs and create reusable modules. Share your custom elements with others via the iCircuit Gallery.
AUDIO SIMULATION
Hear your circuits. Speakers, buzzers, and microphones produce real audio output.
Perfect for students learning electronics, hobbyists prototyping projects, and engineers validating designs, all without burning out a single component.
ABOUT ICIRCUIT PRO (OPTIONAL)
iCircuit is a complete app with a one-time purchase. iCircuit Pro is optional and adds extra components (including more PICs and a larger 4000/7400 IC library) and helps fund ongoing development. Pro is not required for core simulation or everyday circuit design.
Terms of Use: [link removed]
License: Commercial
Use it like a CAD tool: add components, wire them up, and set their properties. But iCircuit is unlike typical CAD apps because it is always simulating. You do not stop to take a measurement or spend time configuring reports. Instead, you just play with the circuit as you normally would, with the power on.
Build circuits with over 300 components, from simple resistors and LEDs to programmable Arduinos (Uno, Nano, Mega, ESP8266, ESP32), Raspberry Pi Pico boards running real MicroPython and CircuitPython, PIC microcontrollers, and 60 4000/7400-series digital ICs (more available with Pro). Connect elements, adjust values, and instantly see the results.
BUILT-IN TEST EQUIPMENT
• Multimeter: Probe any point to read voltage, current, and power
• Oscilloscope: Track multiple signals with touch-controlled time scale, stacked/unstacked views, FFT analysis, and Bode plots
• Gauges: Visualize voltages, currents, and frequencies directly in your circuit
• Signal generators and configurable sources
EXTENSIVE COMPONENT LIBRARY
• Raspberry Pi Pico and Pico 2 running genuine MicroPython and CircuitPython firmware
• Programmable Arduinos (Uno, Nano, Mega, ESP8266, ESP32)
• Programmable PIC microcontrollers (assembly and HEX files, more available with Pro)
• Power: Voltage regulators (78xx, LM317), sources, dependent sources, power jacks, and simulated antennas
• Analog: Resistors, capacitors, inductors, diodes, BJTs, MOSFETs, thermistors, triodes, and tetrodes
• Digital: Logic gates (AND, OR, NAND, NOR, XOR), JK and D flip-flops, and 60 4000/7400-series ICs (180+ available with Pro)
• ADCs and DACs
• Sensors and displays: LEDs, 7-segment, NeoPixels, matrix displays, thermistors
• Electromechanical: Motors, servos, SPST/SPDT and DPST/DPDT switches, push buttons, relays, and speakers
SPICE, VERILOG, AND VHDL
Import vendor SPICE models and subcircuits and use them as components. Write Verilog or VHDL in the HDL element and wire it to the rest of your circuit.
CREATE CUSTOM ELEMENTS
Build sub-circuits and custom elements to componentize your designs and create reusable modules. Share your custom elements with others via the iCircuit Gallery.
AUDIO SIMULATION
Hear your circuits. Speakers, buzzers, and microphones produce real audio output.
Perfect for students learning electronics, hobbyists prototyping projects, and engineers validating designs, all without burning out a single component.
ABOUT ICIRCUIT PRO (OPTIONAL)
iCircuit is a complete app with a one-time purchase. iCircuit Pro is optional and adds extra components (including more PICs and a larger 4000/7400 IC library) and helps fund ongoing development. Pro is not required for core simulation or everyday circuit design.
Terms of Use: [link removed]
License: Commercial
| Release info | New Release on Oct 12, 2026 |
|---|---|
| Release notes | iCircuit 1.16 is the biggest update in years: real SPICE subcircuits, Verilog and VHDL simulation, and fully emulated Raspberry Pi Pico boards running genuine MicroPython and CircuitPython, all in the same real-time simulator you already know. RASPBERRY PI PICO & PICO 2, FULLY EMULATED Drop a Raspberry Pi Pico or Pico 2 into your circuit and write Python! iCircuit boots real MicroPython 1.28 and CircuitPython 10.2 firmware on machine-level emulations of the RP2040 and RP2350 processors, your choice of firmware per board. • Write Python right in the app: syntax-highlighted editor with edit-time error checking and multi-file projects • Interactive serial console with a Serial Plotter running alongside • Real tracebacks with actual file and line numbers, just like on hardware • GPIO, PWM, ADC, and I2C/SPI/UART buses interact with the rest of your circuit in real time • Labeled pin roles, on-board LED, and effective emulated clock speed in the info panel SPICE SUBCIRCUITS Import industry-standard SPICE models and use them as first-class circuit elements: • Transistors and diodes with .MODEL cards: BJTs, MOSFETs, and multi-emitter BJTs • All dependent sources (E, F, G, H) and independent V/I sources with standard waveforms • Nested subcircuits with parameters • Coupled inductors (K mutual inductance) • .INCLUDE, .IC, and .TEMP directives, with graceful handling of analysis commands • Robust, case-insensitive parsing with clear error messages Grab a vendor's SPICE model off the web and simulate it right in iCircuit. VERILOG AND VHDL The new HDL element compiles and simulates synthesizable Verilog and VHDL in real time. Design a counter, a state machine, or glue logic in the language you use at work or school, wire it to LEDs, switches, and the rest of your analog circuit, and watch it run. NEW ELEMENTS • I2C sensors: HDC1080 humidity, MLX90614 IR thermometer, DS1307/DS3231 real-time clocks, ADS1115 16-bit ADC, readable straight from Python • AC Current Source, On-Off- |
| Listing data | App Store |
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