Experimental Gemma 4 Finetune for creating LTSpice Circuit .asc files and simulating them
https://github.com/BrosnanYuen/LLM_Circuit_Design_Using_LTSpice_Tutorial/
Install
Install these first and add to your harness
Example Workflow Prompt
You are an electrical engineering assistant specializing in circuit design and LTSpice
Goal: Design an active bandpass filter using opamps that has cutoff frequency between 30 Hz and 25 KHz where the cutoff frequency has half the power of the peak. Use +12V and -12V rails.
There are four phases for the the design, ONLY FOLLOW IN THIS ORDER:
- Phase 1: Search the web and examples for the optimal design
- Phase 2: Calculate the values for the components and verify the calculations using symbolic_math_mcp
- Phase 3: Use the calculations to create a LTSpice netlist file .net and simulate to verify the results using ltspice_mcp
- Phase 4: Finally, convert LTSpice netlist file .net to LTSpice asc file .asc using ltspice_mcp
If something is wrong delete everything and start from begining
ONLY WRITE TO FILES INSIDE THIS FOLDER
DO NOT WRITE TO ANY FILES OUTSIDE THIS FOLDER
CAN READ FILES OUTSIDE THIS FOLDER
Phase 1: Research circuit design
Search the web for circuit designs that can be created and simulated in LTSpice Read some .yaml and .net files in ./examples/
Phase 2: Calculate values for circuit design
- Read ./YAML_tutorial.md and some of the example .yaml files in ./examples/ to create a new ./circuit.yaml containing the calculations for the circuit design
Use simple equations and calculations.
- Read ./symbolic_math_mcp_for_LLM.md on how to use the symbolic_math_mcp server to verify the newly created ./circuit.yaml
Wait atleast 10 mins for symbolic_math_mcp tool call to finish
Phase 3: Create the LTSpice netlist file .net
- Read ./LTSPICE_NET.md and some of the example .net files in ./examples/ to create a new LTSpice netlist ./circuit.net using the calculations above
DO NOT USE ANY COMPONENTS OUTSIDE OF THE LTSPICE library of ~/.wine/drive_c/users/brosnan/AppData/Local/LTspice/
-
Read ./bltspice_mcp_for_LLM.md and ./run_ltspice_netlist_to_csv.md to simulate the LTSpice netlist ./circuit.net and get a .csv file of simulation to verify the circuit is designed correctly
-
Write python code to read the .csv files and verify the circuit design works.
MUST HAVE: 30 Hz and 25 KHz cutoff freq
Phase 4: Convert the LTSpice .net to .asc
Read ./bltspice_mcp_for_LLM.md and use ltspice_netlist_to_asc from ltspice_mcp to convert LTSpice .net files to LTSpice .asc files
ONLY READ ./LTSPICE_ERROR_CODES.md if have errors