Pawin Jirasuntornsiri — Bangkok, TH
I build things
that actually ship.
A patented consumer product with 98% of its market. Five competition robots and a national title. 3D-printed tumor models for surgeons at 0.2% of the usual cost. Every claim on this page comes with a number attached.
Explore. Dream. Discover. Then go build it.
Flagship product · 01
Turbo Yadom™
Thailand’s first fan-assisted herbal inhaler. I designed it, patented the fan-integrated lid, manufactured it, and sold it — independently, at 15. The exploded model beside this is the real CAD assembly: patented fan lid, ventilated body, and the circuit that drives it.
- PatentLid with integrated fan — granted, IP Thailand
- Revenue>100,000 THB (≈ $3,300), profitable
- Market share98% of fan-assisted herbal inhalers
- RoleProject lead & designer — end to end
Hardware startup · 02
Printify3D + Quote Engine
A registered Bangkok 3D-printing studio I run solo — printer farm, an original product line, and a self-built instant quoting engine that parses your file and prices it before you've finished your coffee.
Live — printify3d.store
Personal project · 03
Design & OpenHome
Two tracks: a running personal habit of designing a product for every annoying problem in my life, and my engineering contributions to OpenHome Foundation, a nonprofit open-source hardware initiative — build guides, CAD, firmware, and a printable PDF for each one, released for anyone to fork and build.
General design
A weekly-ish habit — sketches and prints, published free when they're worth sharing.
OpenHome Foundation contribution
Nonprofit, open-source hardware — two build guides live so far.
Software · 04
RenalSeg
An AI-assisted segmentation and masked-SLA printing pipeline for patient-specific kidney tumor models, co-developed with Thailand's leading hospital. Scans go in; an AI-assisted segmentation step isolates the tumor and surrounding anatomy; the output prints as an anatomically accurate surgical-planning model at a fraction of the conventional cost.
Live tool — renalseg.comSoftware · 05
Colorbook
Most SAT prep hands you an answer key and a score. Colorbook is built the other way round: every one of 2,079 real questions carries a worked explanation, and the review reads the attempt itself — the annotations, the strike-outs, how long each question took — to name the pattern behind the mistakes rather than just counting them.
Live app — colorbook.tech- 2,079 real questions, all explained Not generated filler — tagged by topic and difficulty band, and 2,079 of 2,079 carry a written solution.
- It reads your working, not your score Annotate and strike out on screen. The review replays what you actually did, question by question, with the timings.
- Banded like the real adaptive test 30 topics across 13 difficulty bands, so a set can match the level you are sitting at.
Portfolio · 06
Ventures & builds
Hardware, software, and the businesses around them — designed, coded, and operated by me.
Product design
TwinTap
A dual-slot RFID card holder that solves card interference — carry two cards, tap either one cleanly. Designed from problem to production-ready mechanism.
Founder · Community
Build A Bot
Open-source educational robotics kits for underprivileged schools at ~20% the price of competing kits — fully hackable, for ages 5–18. Raised ฿20,000 to roll out in Bangkok schools.
Web · Tooling
Workshop Tools
Twenty-six calculators I kept re-deriving at the bench — feeds and speeds, tap drills, wire gauge, filament cost, bolt torque. Every one shows its working and runs entirely in the browser.
Web · Simulation
Toybox
Fifty-five toys and games, each a single dependency-free HTML file: a falling-sand automaton, n-body gravity, a Sudoku generator that proves its puzzles unique, a pinball table, and a truck that lands on its roof.
throw off the bowlines
Robotics · 07
VEX Robotics — three seasons, five robots
I led the first VEX team in Shrewsbury International School Bangkok’s history — recruiting it, designing and building 5 competition robots, delegating the engineering, and driving in matches.
2023–24 · Over Under
From nothing at scrimmage → national champions
Our first-ever season. We scored nothing at our first scrimmage, iterated relentlessly, and by February won the Excellence Award — the highest award across ~30 teams in Thailand — becoming the first team in school history to qualify for the VEX World Championship as a Thailand representative.
Excellence Award — National VEX Worlds qualifier — Thailand rep2024–25 · High Stakes
Taking it international
Competed abroad and took home the Amaze Award in Singapore, placing the team among the top performers at an international event.
Amaze Award — Singapore (International)2025–26 · Push Back
Engineering recognized
Top scores for design documentation and team interview: Design Award at VEX Regionals and the Inspire Award at the St Andrews RAT event.
Design Award — Regionals Inspire Award — St Andrews RATsail away from the safe harbor
Work · Research · 08
Experience & research
Agricultural drone engineering
HG Robotics — Bangkok
Worked on a next-generation agricultural drone: added pesticide flow-rate measurement, an additional camera system, and a radar mount for improved flight stability.
Hardware + AI
Heatstroke-sensing earbuds
Samsung Solve for Tomorrow — Designer & hardware coder
Earbuds that read body temperature and heart rate plus ambient temperature and humidity, feed 10+ data points into an AI risk model, warn the user before heatstroke onset, and can trigger an emergency call if one is detected.
Design lead
F1 in Schools
Miniature CO₂-powered F1 — national circuit
Oversaw car design and manufacturing, pitched sponsors to more than $10,000 in accumulated offers, and finished 2nd of 30 nationally with the Best Presentation award.
Teaching kids to code
Code Genius
Created a block-programming competition for 5–7-year-old students.
40+ members
Rhythms of Recovery
Music organisation — Co-founder & head of technical team
Led the school’s largest music group: taught music in underprivileged schools, staged 29 performances at local schools and hospitals, and raised funds to donate ukuleles.
catch the trade winds in your sails
Recognition · 09
Awards
explore. dream. discover.
Human · 10
About
I’m Pawin — everyone calls me Hero. I’m a student at Shrewsbury International School Bangkok, and I spend most of my time in a workshop turning problems into products: a patented inhaler that owns 98% of its market, robots that took a first-year team to the World Championship, tumor models that let surgeons rehearse before they cut.
The pattern I care about: find a real constraint (cost, access, comfort), engineer it away, then actually ship — patent it, sell it, open-source it, or put it in a school. An idea that stays a CAD file doesn’t count.
Off the bench: I long-jump, play drums, and my house is thoroughly over-automated.
The workshop
Twenty years from now you will be more disappointed by the things you didn’t do than by the ones you did. So throw off the bowlines. Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover.
อีกยี่สิบปีนับจากนี้ คุณจะเสียดายสิ่งที่ไม่ได้ทำ มากกว่าสิ่งที่ได้ทำลงไป ดังนั้นจงปลดเชือกออกจากฝั่ง แล่นเรือออกจากท่าอันปลอดภัย รับลมค้าไว้เต็มใบ สำรวจ ฝัน ค้นพบ
Mark TwainContact · 11
Want the full schematics?
Technical details, BOMs, and build logs are available on request — say hello.