ltspice-agent 0.2.0

An AI-agent for optimization of power electronics circuits

SpiceAgent

AI-powered agent that optimizes LTSpice circuit designs autonomously.

Overview

SpiceAgent uses an LLM to analyze netlists, propose parameter modifications, and run LTSpice simulations iteratively until the circuit meets the target specifications. The agent is capable of optimizing non-linear circuits and features a design tailored for effective human-machine interaction, allowing for collaborative circuit refinement.

Workflow: Analyze → Propose → Simulate → Evaluate → Iterate

Installation

You can install SpiceAgent directly from the source:

git clone https://github.com/DavideMilillo/SpiceAgent.git
cd SpiceAgent
pip install .

Or, you can install directly the python package: https://pypi.org/project/ltspice-agent/0.1.0/ pip install ltspice-agent==0.1.0

Quick Start (V2)

The recommended way to use SpiceAgent is via the PowerAgent class:

from spiceagent import PowerAgent

# 1. Initialize the agent
agent = PowerAgent(api_key="sk-...")

# 2. Define your initial guess and targets
initial_values = {
    'Vin': '12', 
    'Cin': '300u', 
    'L1': '14u', 
    'Cout': '38u', 
    'Rload': '6', 
    'Vsw': 'PULSE(0 10 0 1n 1n 4.4u 10u)',
    'D1': 'MBR745', 
    'M1': 'IRF1404'
}

targets = {
    "v_mean": 5.0,  # Target output voltage (Volts)
    "ripple": 10   # Maximum ripple allowed (%)
}

# 3. Run Optimization
# If circuit_path is None, it uses the built-in Buck Converter example.
# You can increase max_iterations if the agent needs more steps.
result = agent.optimize(
    circuit_path=None, 
    initial_values=initial_values,
    target_specs=targets,
    max_iterations=50
)

print("Optimization Complete!")
print("Final Values:", result.get("circuit_values"))

Interactive Mode (New in V3) ✅

For complex designs or when you need a "Human-in-the-Loop" approach, use the new PowerAgentV3.

Features:

• Consultant Phase: Chat with the agent to define goals and identify tunable parameters.
• Live Mode (Windows Only): Updates your .asc schematic in real-time as the agent optimizes.
• Safe Mode: Works on a copy of your files (default).

from spiceagent import PowerAgentV3

# 1. Initialize
agent = PowerAgentV3()

# 2. Run Interactive Optimization
# This launches a CLI chat session.
agent.optimize(circuit_path="path/to/my_circuit.asc")

Project Structure

📦 SpiceAgent Package (New Standard)

• src/spiceagent/: The source code of the package.
• src/spiceagent/power_agent.py: The main PowerAgent class logic.

🔌 Legacy Scripts (V1)

• PowerAgent/: Contains the original V1.5 script and LangGraph experiments.
• BabySpiceAgent/: Simple RC circuit prototype.

Changelog

See CHANGELOG.md for version history.

License

MIT License

Author

Davide Milillo