ELEC291P1

Reflow Oven Controller - A.K.A Lit Solder Controller

PROJECT COMPLETED

Resources

GitHub Pages: https://fsxac.github.io/ELEC291P1/

Trelle Link: https://trello.com/b/4QynfMXc/project-1-lit-solder-controller

Google Drive: https://drive.google.com/drive/folders/0B7_AKRr0ByjpWmxVZVN0MWlLRlU

Hardware

AT89LP52 Microcontroller

• Input: ADC module, LM335, thermocouple, buttons
• Output: Serial to PC (via USB), PWM SSR control, speaker, LCD, LED

System Configuration

OPAMP Configuration

Task 1: Circuit and Hardware Assembly

• Assemble OP AMP
• Attach OP AMP to thermocouple
• Attach LM335 for temperature offset
• Attach sensors to ADC, attach ADC to microcontroller

Software

Task 1: Reflow FSM

• Program reflow FSM shown in diagram on lecture slides
• Integrate FSM with interface
• Test FSM
• Add required sound and LCD outputs during each transition

Task 2: SSR Controller

Task 3: Interface and Configuration (FSM)

important: crtTemp should be temperature input from sensors

• Wire up crtTemp to sensors

• Update LCD Screen for each state

• Make marcos for incrementing and decrementing temperature

• Program what happens when you press start while on the main screen

• Make macros for setting time

• Modify code for 3 digit temperature readings

• Unit test interface

• Unit test FSM

• Integration to main program

Pin Assignment

Pin	Assignment
P0.0	Buzzer Output
P0.1	unassigned
P0.2	unassigned
P0.3	unassigned
P0.4	unassigned
P0.5	unassigned
P0.6	unassigned
P0.7	unassigned
P2.0	ADC - CE
P2.1	ADC - MOSI
P2.2	ADC - MISO
P2.3	ADC - SCLK
P2.4	Button - Start / Stop
P2.5	Button - State
P2.6	Button - Up
P2.7	Button - Down
P3.7	SSR Output

Extra Features