Breadpad - Digital Circuit Simulator

Breadpad - Digital Circuit Simulator #

Design, simulate, and analyze electronic circuits with professional-grade SPICE accuracy on your iPhone, iPad, Mac, and Apple Vision Pro.

Download on the App Store #

What is Breadpad? #

Breadpad transforms your device into a powerful electronics workbench. Whether you’re a student learning circuits, an engineer prototyping designs, or a hobbyist exploring electronics, Breadpad provides the tools you need with an intuitive visual interface.

Key Features #

  • Visual Breadboard Interface - Place components just like on a real breadboard
  • Professional SPICE Engine - Industry-standard ngspice simulation accuracy
  • Comprehensive Component Library - From resistors to MOSFETs to custom ICs
  • Advanced Analysis Tools - Time domain, frequency response, Monte Carlo, and more
  • Universal App - Works seamlessly across iPhone, iPad, Mac, and Vision Pro
  • Real-time Simulation - See results instantly as you build

Perfect For #

  • Students - Learn electronics with immediate visual feedback
  • Engineers - Rapid prototyping and circuit validation
  • Educators - Demonstrate circuit concepts interactively
  • Makers - Test ideas before building hardware
  • Hobbyists - Explore electronics without expensive equipment

Getting Started #

1. Build Your Circuit #

Select components from the toolbox and place them on the breadboard. Connect with wires just like the real thing.

2. Set Parameters #

Double-tap any component to adjust values. Set resistances, capacitances, voltage sources, and more.

3. Add Probes #

Tap any connection point to add measurement probes. Monitor voltage and current throughout your circuit.

4. Run Analysis #

Choose from multiple analysis modes:

  • Transient - See how circuits behave over time
  • Operating Point - DC bias conditions
  • Real-time - A continuously updating live view
  • AC Analysis - Frequency response and filters (Premium)

5. View Results #

Professional oscilloscope interface shows waveforms, measurements, and data. Export results for reports or further analysis.

Platform Features #

iPhone & iPad #

  • Touch-optimized interface
  • Apple Pencil support (iPad)
  • Haptic feedback
  • Split View multitasking

Mac #

  • Multiple windows
  • Keyboard shortcuts
  • Large screen layouts
  • Professional workflows

Vision Pro #

  • 3D circuit visualization
  • Volumetric component models
  • View your breadboard in space

Premium Features #

Upgrade to unlock:

  • Unlimited Probes & Signals - Monitor every node at once
  • AC Small-Signal Analysis - Frequency response and Bode plots
  • Tolerance & Monte Carlo - Statistical component variation
  • Temperature Sensitivity - Thermal effects on your circuit
  • Advanced Voltage Sources - PWM, exponential, FM, AM, audio
  • Custom Models & Chips - Edit chip netlists, save custom parts
  • Data Export - CSV simulation data and WAV audio

Learn More #

Start Building Today #

Download Breadpad and join thousands of users designing circuits the modern way. Free to download with optional premium upgrade.