The document summarizes the challenges faced and overcome by a group in creating a traffic light and pedestrian light system prototype. The original plan was to create just a traffic light prototype, but the project scope was expanded to include pedestrian lights as well. Several circuit design challenges were encountered and addressed, such as timing issues with the LEDs. The group made multiple changes to the circuit plan before arriving at a design that used a simple logic trick of paralleling the red traffic light LED to the green pedestrian light LED and vice versa. In the end, the group was able to create a working miniature model of a highway with integrated traffic and pedestrian lights and received a perfect mark for their project.

1. Ancheta, Zacha Valerie G.
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Our project is a Traffic Light and Pedestrian Light System Prototype. In doing the project
we faced different challenges. Challenges that were overcame making the project
possible. To introduce, each one of the group is a first timer in creating and
implementing a circuit design, making it hard for us to even think about what project is
doable for us to propose.
To start with, the original plan is creating a traffic light prototype only, but it was
approved that we should merge it with the other proposal which is the pedestrian light
system. Therefore joining the two projects we proposed brought up the first challenge.
Since we’re ready for the traffic light prototype, the virtual simulation of circuit was then
applied to the breadboard. The prototype worked but at first there was a slight problem
about the timing of the LED, it was solved by doing some adjustments in the circuit. As
we tried creating the virtual simulation of the pedestrian system, it works, but as the
simulation is applied in the breadboard, it came up not the way it was supposed to work.
We created the plain traffic light system and tried passing it, yet we are told that we
could only get low grade. The group was then at a hassle, instead of letting everyone
rage, we decided to call up a break. At this part, I really appreciate how one member
humbled down and how the other worked hard to finish this.
Changing the circuit plan once again, we used a simple logic trick in adding the
pedestrian light system in parallel to the traffic light system. We parallel the red LED of
traffic light system to the green LED of the pedestrian light system and vice versa. The
timing then depends to the 555.
In the lay-out of the project, we decided to make it in a miniature. Then again, new
circuit was created to make it flexible with the miniature we planned. We decided to
make a highway with pedestrian light in order make it more presentable.
In conclusion, in creating this project is a bit pain to start, but as it flows and when you
see that your project was working, the happiness is irreplaceable. I am glad that our
professor gave us a perfect mark and I know that she pushed us to create this project
because she believed we can.