Here is a link to our design report:
Team_D5_Doan_Wang_Ma_design_report.pdf
It can also be found under the design review tab on this website.

Carnegie Mellon ECE Capstone, Spring 2026 – Caleb Doan, Jayson Ma, Jack Wang
Here is a link to our design report:
Team_D5_Doan_Wang_Ma_design_report.pdf
It can also be found under the design review tab on this website.
Design Review Presentations took place this week. We feel it went very well, and are pleased with the progress we’ve made up until this point. All specific purchase items were selected and orders have been placed. We are excited for our orders to be processed and delivered so we can begin the assembly process.
This week, I ordered the primary coil components in alignment with our SSTC design requirements. Based on our system specification and the 48V LED power supply driving the primary coil. I finalized the selection of the primary winding conductor and ordered 50 feet of 18 AWG solid copper wire to construct the primary coil. The 18 AWG gauge was selected to safely handle the expected primary current while minimizing resistive losses and heat generation during 10-minute continuous operation, as required by our performance metrics. The estimated length allows for 6–8 turns around a ~5-inch diameter base with additional margin for lead routing and adjustment during tuning.
Circuitry component orders were placed this week, as such progress is on a bit of a hold until the ordered parts arrive.
This week I ordered the components for the secondary coil, mainly consisting of the PVC pipe body, the winding wire, and the topload. My progress as of now is on schedule, and next week I hope to be able to begin assembling the secondary coil.
I invested most of my time studying the power circuitry, making sure that our design would meet not only the power, but also the safety requirement. Instead of hand-picking all the electronic components, I decided it was better for us to go with a preassembled power unit due to its industrially tested power supply, reliability, and safety design. The control circuitry will be powered off of the 12 V rail of a computer power supply; the power for the primary coil will be provided by a 48 V LED power supply. Besides, I took many hours to have a better understanding of the idea behind Tesla Coils, as this is essential given that none of us have actually built one prior.
This week has been very productive. A power plan has been successfully created that is safe, reliable, and has good headroom. The interrupter, oscillator, and trigger have all been finished and are ready to be experimentally tuned (given that component tolerances must be considered, we have had to leave a couple things adjustable currently). The coil design process is most of the way done, the only thing left in theoretical design is to design the primary coil’s supporting circuitry, and then an enclosure for the circuitry itself. We think that this shouldn’t take too long and will be finalized in time for our Design Review Presentation.
A – Written by Jack) We’ve designed our product in consideration of welfare in the sense that it gives easier access to simple, affordable, visually presentable education to classes conducted with a low budget. I personally had the experience of volunteering at rural programs in China where music classes were conducted in the cheapest way possible. The teacher would write the notes on a chalk board and oftentimes no instruments could be played along while the students were singing. Our Musi-coil provides an option for a widely compatible speaker that is also educationally engaging, which can be used in music classes as well as physics, engineering, and even chemistry classes. Therefore, I consider our product to be not only an affordable teaching tool, but also one that achieves engagement levels unattainable by speakers costing 10x more.
B – Written by Jayson) The Musi-coil addresses social factors by making high-voltage physics accessible and engaging to diverse audiences. By enabling music playback through plasma discharge using a 3.5mm audio jack, we transform an intimidating technical demonstration into an inclusive education experience that creates emotional connections and inspires curiosity about STEM fields across different age groups and backgrounds. This design reflects our commitment to public science literacy and making advanced engineering concepts both approachable and memorable, potentially inspiring future engineers.
C – Written by Caleb) Our product is designed with economic factors in mind for both the educator and the hobbyist. Almost all internal parts are both affordable and readily available and the housing is 3D printed, thus production costs are low. Its compact size and relatively rectangular profile mean that distribution costs can be kept low, thanks to low wasted space in shipping organization. This means that final cost is kept low. As an educational device, this product is significantly cheaper than a large number of products meant for demonstration, especially ones with such versatility. While cheaper products that are similar to ours do exist, they are not nearly as impressive as outputs and are typically too small to be used in a demonstrative settings. In regards to the hobbyist, our device may seem expensive considering the aforementioned cheaper alternatives, however, there is not a widely available product which performs similar to ours on a similar scale of size or electrical output, and as such, our economic design means that our product, while not inherently affordable as a desktop collectible, is very reasonably priced in terms of its capabilities.
This week I finished up the trigger circuitry. I am of the belief given the research and calculations which I have done that this will provide the appropriate output necessary to drive the MOSFET gate in such a way that class E operation of a solid state tesla coil will be properly achieved. I also had a bit of extra time this week so I began working with the coil. Using a program called JAVATC I have come up with what I believe will be reasonable and functional dimensions and build specifications for both the primary and secondary coils.
Circuitry design is on track. The trigger setup has been fully designed, preliminary research has been done on power circuitry, and interrupter and signal output design are both on track to completion. We feel that the circuit designing process is coming along well and anticipate that it will be done by next week in order to move along to ordering circuit components and begin work on designing the coils.