Course project · Team of 5·Feb – Mar 2026Complete
Reflow Oven Controller
PWM-driven SSR control of an AC heating load, sequenced by a 5-state FSM written in 8051 assembly.
A reflow soldering controller that drives an oven through preheat, soak, ramp, reflow and cooling. The heater is switched through a solid-state relay with PWM duty-cycle control, and the whole sequence runs as a finite-state machine in 8051 assembly.
Highlights
- Controlled an AC heating load via PWM-driven SSR switching, sequenced by a 5-state FSM
- Validated LM335 temperature sensing to ±3 °C across 25–240 °C against a Fluke 45 reference
- Verified fail-safe shutdown if the oven missed 50 °C within 60 s or exceeded 240 °C
