Embedded Files
Week 2 projects
Week 2 projects
Automatic alarm system
Our team was instructed to design and simulate a heart attack monitoring device using EveryCircuit and Tinkercad, then build it with discrete components. The system will use digital logic chips (7408 AND, 7432 OR, 7404 NOT, 74374 flip-flops, and a 555 timer) to evaluate three indicators: elevated troponin, ST-segment changes on an ECG, and decreased SpO₂. Based on the number of detected indicators, the device will display a green LED for no risk, a yellow LED for one indicator, a red LED and notify a healthcare provider for two indicators, or sound an alarm and contact emergency services when all three indicators are present.
Ruben is using the Heart and Brain Spike Box to detect and display the electrical signals produced by the heart, brain, or muscles. It allows us to observe these signals in real time, helping them understand how the nervous system and heart function while learning about bioelectricity and basic electronics.
Ruben is using the Heart and Brain Spike Box to detect and display the electrical signals produced by the heart, brain, or muscles. It allows us to observe these signals in real time, helping them understand how the nervous system and heart function while learning about bioelectricity and basic electronics.
An example of heart activity on the spikebox, The SpikeBox is an educational device that detects and amplifies the body's electrical signals, such as those produced by the heart, brain, or muscles. It allows these signals to be displayed in real time, helping users study bioelectric activity and understand how the nervous system functions.
We are brainstorming ideas about the circuit
We are brainstorming ideas about the circuit
More calculations about the logic circuit
More calculations about the logic circuit
Our logic circuit prototype
Our logic circuit prototype
Our automatic alarm system was built using three main sections: the logic circuit, the triple 555 timer circuit, and the alarm circuit. We were encouraged to improvise with the materials provided rather than follow a detailed set of instructions. This required us to experiment with different circuit layouts, troubleshoot problems independently, and use trial and error to determine the most effective solutions. We first designed and tested the logic circuit, which processes the sensor inputs and determines when the alarm should be activated. Next, we assembled the triple 555 timer circuit, which controls the timing of the alarm output. This stage proved to be challenging for us, as we encountered several issues, including incorrect wiring, components overheating, and even the circuit producing smoke during testing, we also have to identify the resistance of multiple resisters and innovate based on the materials we have. We carefully inspected the connections, replaced damaged components, and continued troubleshooting until the circuit operated more reliably. Throughout the project, we used breadboards, integrated circuits, and careful testing to verify each section before combining them into a complete system. The experience taught us the importance of accurate wiring, systematic troubleshooting, and teamwork, as even small mistakes could prevent the entire system from functioning properly. Although the timer circuit presented many obstacles, working through those challenges improved our understanding of digital electronics and circuit design.
Our 555 timing circuit, This circuit controls how long the alarm remains active after it is triggered. It generates precise timing signals that ensure the alarm operates for the desired duration before resetting.
Our 555 timing circuit, This circuit controls how long the alarm remains active after it is triggered. It generates precise timing signals that ensure the alarm operates for the desired duration before resetting.
This is our alarm circuit, it is not complete and has many errors, this circuit produces the audible alert when it receives a signal from the logic and timing circuits. It drives the buzzer to notify the user that the alarm condition has been detected.
This is our alarm circuit, it is not complete and has many errors, this circuit produces the audible alert when it receives a signal from the logic and timing circuits. It drives the buzzer to notify the user that the alarm condition has been detected.
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