Breadpad is a digital electronics breadboard exclusively for iPad, iPhone and Mac. Place components, connect them, and simulate the result with a virtual oscilloscope.

Whether you are a student, hobbyist, or professional engineer, Breadpad can help you ideate, plan, and implement new circuit designs. Learn new concepts, tinker with prototypes, and evaluate changes to production systems.

Breadpad is free to get started.

Free Features:
- Intuitively connect components on a virtual breadboard
- Customize chips with your own SPICE simulations
- Place resistors, capacitors, and diodes with precise device models
- Visualize the impact of parameter changes on fast-rendering charts
- Capture snapshots of circuits to insert into documentation or web pages
- Identify components more quickly using reference tables for markings and labels
- Optionally store .breadpad files in iCloud for collaboration, sharing, and seamless file sync
- Only on Apple Silicon: use Breadpad on your Mac to view and edit breadboard simulations
- Share your files via iMessage, email, Google Drive, or any other collaboration tool
- Simulate 8-pin, 14-pin, and 16-pin DIP-packaged integrated circuits
- View any .breadpad file, including files from Premium subscribers

Unlock more features with a Premium subscription.

Premium Features:
- Run temperature sensitivity analysis to evaluate environmental effects on your circuits
- Unlock five additional voltage sources
- Export simulation data to CSV for further analysis and visualization
- Place chips with 18+ pins on the breadboard
- Adjust component tolerances with six-sigma gaussian distributions
- Visualize manufacturing tolerances with dynamically randomized simulation values
- Select from a growing library of built-in preconfigured parts

View, edit, and share .breadpad files:
- Breadpad files contain an entire breadboard circuit, component netlists and parameters in a single shareable file
- Collaborate with your team using your favorite file synchronization tools: iCloud, Dropbox, Google Drive, One Drive, and more!
- Free users can view any .breadpad file, including files created by Premium subscribers
- Precise simulation output based on the industry-standard ngspice open source project

Implement simulations of integrated circuit inputs and outputs using SPICE:
- Place virtual DIP-packaged integrated circuits on your breadboards
- Each chip is modeled by an editable SPICE subcircuit containing analog and/or digital components
- Edit SPICE netlist source code using a built-in text editor compatible with most LTSPICE and PSPICE device models
- Import and save PDF datasheets for reference and faster collaboration

Create accurate diode simulations by adjusting a variety of detailed parameters or selecting from dozens of pre-configured common parts:
- Breakdown voltage and current
- Zero-bias junction capacitance
- Saturation current
- Grading and emission coefficients
- Series resistance
- Transit time
- Junction potential
- Noise characteristics
- Energy gap

Premium subscribers unlock five additional kinds of voltage sources:
1. pulsed DC signals
2. exponential sources
3. piecewise linear sources
4. single-frequency FM and
5. amplitude-modulated AM

Every week, we add new example circuits and learning materials available for free to all Breadpad users, helping accelerate the progress of beginners and experienced engineers alike.

Breadpad does not collect your personal data. We only collect information to assist with troubleshooting, customer support and quality assurance.
Privacy policy: https://breadpad.com/privacy/
Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/