IGBT Welding Inverter Firmware
Budget: $3,000 – $5,000 USD
I have a production-ready, IGBT full-bridge welding inverter that already powers both TIG and MMA processes, yet the embedded side still needs a final expert pass before release. The control board is built around 8051 and STC MCUs running Keil C51 firmware, and every line of code directly shapes arc stability, HF start, AC balance, soft-start, and safety interlocks.
The short-term goal: review, tidy, and extend the existing code so it drives the power stage flawlessly in TIG and MMA, AC and DC. That means refining PWM timing, gate-drive dead-time, current-feedback filtering, and all the little state-machine details that separate a decent welder from a great one.
Core tasks and deliverables
• Audit the present C51 codebase, flagging race conditions or timing pitfalls.
• Implement any missing control routines (arc-force, hot-start, adjustable pulse, fan logic).
• Tune PID and switching parameters against real hardware via an in-circuit debugger (STC-ISP / Keil ULINK).
• Hand back well-commented source, updated schematics or register maps if touched, plus a one-page validation report showing stable operation across the full current range in TIG and MMA.
Everything is fully remote; I’ll supply schematics, BOM, scope captures, and can stream live bench tests so you can see results in real time. Expect tight technical conversations, quick feedback loops, and freedom to propose smarter approaches if you spot them.
If you’ve shipped TIG/MMA inverter firmware on 8051 or STC before, this should feel familiar and fun. Let’s push the last mile together and get metal melting beautifully.
The short-term goal: review, tidy, and extend the existing code so it drives the power stage flawlessly in TIG and MMA, AC and DC. That means refining PWM timing, gate-drive dead-time, current-feedback filtering, and all the little state-machine details that separate a decent welder from a great one.
Core tasks and deliverables
• Audit the present C51 codebase, flagging race conditions or timing pitfalls.
• Implement any missing control routines (arc-force, hot-start, adjustable pulse, fan logic).
• Tune PID and switching parameters against real hardware via an in-circuit debugger (STC-ISP / Keil ULINK).
• Hand back well-commented source, updated schematics or register maps if touched, plus a one-page validation report showing stable operation across the full current range in TIG and MMA.
Everything is fully remote; I’ll supply schematics, BOM, scope captures, and can stream live bench tests so you can see results in real time. Expect tight technical conversations, quick feedback loops, and freedom to propose smarter approaches if you spot them.
If you’ve shipped TIG/MMA inverter firmware on 8051 or STC before, this should feel familiar and fun. Let’s push the last mile together and get metal melting beautifully.