Week 4

Updated: Feb 27, 2025

Members: Hamad Alsayed, Amanda Guo, Sultan Hassan, Aaron Symonds

Week 4 activities:

During this week, we firstly drilled holes in the top of the boat for the 3 LEDs and then drilled a hole in the bottom for the temperature sensor. We then inserted the circuit into the boat toy and then used electronics grade silicone adhesive sealant to seal and waterproof the entire toy. The pictures below show the LEDs lighting up blue and green after being assembled into the toy and sealed with the silicone. 

We then tested the floating and temperature detection feature by placing the toy in a shallow bucket of water and first seeing if it floats. After we confirmed that it floats, we then cooled off the water to below 30 degrees Celcius (confirmed with a thermometer) and observed which LED lit up. As expected, the blue LED lit up. We then heated up the water to between 30 and 37 degrees Celcius and observed which LED lit up. Again, as expected, the green LED lit up. Finally, we heated the water to above 37 degrees and observed if the red LED lit up, which it did. This therefore confirmed that our toy was fully working as we intended.  

Final project

The photos below show our completed project. Note: the tape is covering the LEDs temporarily from when we glued them in, it will be removed during demonstration. 

Final note: We originally wanted to incorporate a speaker module to the toy that would play various sound cues corresponding to the different temperature boundaries, however, we decided there was not enough time to incorporate it into our final project.