tigerbruce/lceda-operation-notes

This repository is a personal operational reference document for working with LCEDA Professional (also known as Jiajian EDA Pro), a Chinese electronic design automation tool used for drawing circuit schematics and PCB layouts. The README is written in Chinese and serves as the single authoritative text file for the author's ongoing temperature-detection module project. The document covers two main areas. The first is the technical setup for connecting to the LCEDA Professional API through a local bridge server. LCEDA Pro exposes an extension called Run API Gateway that lets external scripts call its schematic and PCB editor functions over a local HTTP port. The document records the Node.js bridge server location, port range, how to start it, health check commands in PowerShell, and the correct way to call the JavaScript execution endpoint so that dollar signs in the script are not accidentally expanded by the PowerShell shell. The second and larger area is a detailed definition of what a good schematic looks like, built from studying a Texas Instruments reference design. The document defines six baseline requirements: the system architecture must be legible, electrical connections must be verifiable through a netlist rather than just visual inspection, critical layout constraints must be stated explicitly near the relevant circuits, design decisions must be traceable to datasheets or reference designs, debug access points must be identified so someone receiving a board knows where to probe first, and manufacturing and handoff information must be complete with version numbers, page names, BOM fields, and assembly notes. The document then applies those standards to the current temperature-detection project, which uses five NTC thermistor channels feeding into a microcontroller's ADC. It records the specific component connections that are still missing from the schematic, the required two-page structure (one architecture overview page and one detailed netlist page), ADC sampling timing requirements including how long to wait after switching channels, and the geometry rules for placing five repeated sensor channels consistently. The PowerShell code snippets show how to call the LCEDA API to check wire counts, save documents, import PCB changes from a schematic, and retrieve netlist pin data for verification.