EITHAN TUYILINGIRE - ABOUT
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https://etservice.us/about

I learn things by needing them first. Almost everything on this site
started as a problem I had no idea how to solve.

My current focus is Fiftra, our company developing a fast-charging power
bank around Molicel P50B cells. We are targeting a 0–80% recharge in 15
minutes, with custom charging electronics and thermal management. We
received a 1517 Medici Grant to support prototype development; now the
work is building and testing the design.

In 2023 I joined the electrical team for Okemos Solar Racing, writing
the CAN telemetry for a car that won its division that year. I later
became electrical lead for the 2025-26 season. Vehicle electronics are
unforgiving in a way software is not: a connector works on the bench and
fails in the sun, and you find out with a clock running.

The DJ controller is the clearest version of the pattern. I wanted a
deck, would not pay for one, and decided that meant I should build it.
Three revisions later I can design a PCB and have spent roughly three
times the price of the deck.

Running alongside all of it since 2024 is ET Service, where I design and
build websites for local businesses. It taught me the part no personal
project can: somebody else decides when the thing is finished. Getting
the first client was harder than building the first site.

With my cofounder Pranav Gollu, I built Rulix, a copilot for
export-control work: it researches classifications, shows the regulatory
support behind every claim, and produces something a reviewer can
actually audit. I am putting Rulix on pause and working on Fiftra now.

Away from all of it I run, ski, DJ, and play viola and piano. The common
thread is that I can tell whether I am getting better, and I lose
interest quickly when I cannot.

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