Week 3
July 5, 2022 - July 8, 2022
Biomedical and Electrical Engineering
Goal for Week 3:
This week we were tasked to build a circuit that simulated a COVID-19 detector using LED lights and an alarm. The circuit tracks three COVID-19 symptoms on a timer which corresponds to the correct colored lights and the alarm. Having no symptoms correlates to the green LED light, having one symptom correlates the yellow LED light, and having two symptoms correlates to the red LED light. If all 3 symptoms are present, the alarm will sound. The symptoms include a dry cough, high temperature, and low oxygen levels.
Virtual Circuit - Circuit Lab
Breadboard Circuit
Truth Table
& Equations
When determining outputs on a circuit that contains AND and OR conditions a truth table must be made to visualize every output for each input. In addition, to simplify the table, multiple equations can be formed.
Alarm Circuit
This small part of our larger circuit is what powers the alarm. Following a basic outline of the wiring we were able to build this circuit and have the alarm play a high-pitch sound. This circuit was one of the hardest parts of our prject this week becasue of its complex wiring. In order to organize the wires more efficiently we color coded each number on the 555 chip to the colors of the rainbow. This made our alarm circuit neat, organized, and aesthetically pleasing to the eye.
Further Research on Commercial Circuits
