Here a post for my high school graduate project, that is a 5 person group work, 2 person work for mold design, 2 person work for PCB maker, drilling, soldering, and I work in circuit design, PCB layout design, 8051 coding.
On this project I use five 8051 CPU to make it, and five CPU it got link to sync traffic light timing together, actually on high school knowledge not in deep, after university course, this project can step in to improve use only 1 CPU enough, and below is our work process shot.
1. Project start I use VB coding a simulator for traffic light module. (Simulator Download)
2. Circuit design and LAB test for stabilize.
3. Micro-controller coding & test.
4. PCB layout design.
5. Handmade PCB.
6. Drilling & Soldering.
7. Mold Design
8. Assembling
9. Circuit not work after work complete, that last we found power supply cannot combo use together, due to difference load device, that cause our micro-controller not work, so we design one more circuit module for split power supply source, and solve the problem.
On this project we spend 3 month to completed it, use our 3 year high school knowledge in Electronic, and thank for my other 4 best partner, we work very hard on it, and solve the problem one by one we meet in this project.




























