Loh John Ray
Year 3 Engineering Science student in Singapore. My research is CO₂ adsorption — packed-bed columns, polymer sorbents, breakthrough curves I am fitting at this moment. My builds sit elsewhere: multimodal AI for misinformation, a voice-directed surgical co-pilot, and a blood sampler you can print tonight for under S$10.
Both, at once, all the way down. How I got here is on the about page.
Selected work
SENTINEL — Catching Fake Content Before It Spreads
A multimodal detection agent for text, images, audio and video, built in 24 hours at Hackomania 2026 and then extended for the Gemini Live Agent Challenge. Telegram bot, Cloud Run backend, SEA-LION GUARD for the languages Singapore actually speaks.
- AI
- FastAPI
- Gemini
- SEA-LION GUARD
SOAR — A Voice-Directed Surgical Co-Pilot
One coordinator agent, nine specialists, twenty-six tool functions. A surgeon talks; CT slices, a 3D anatomy model, drug-safety checks and a blood-loss counter appear on the console without anyone touching a keyboard.
- Google ADK
- Gemini Live
- FastAPI
- WebSockets
Lifeline / Quickly-Draw! — A Sub-S$10 Open-Source Blood Sampler
A fully 3D-printable, vacuum-actuated blood sampler for disaster response and low-resource clinics. No electricity, no phlebotomist, 4 mL into a standard VacuTube, under S$10 a unit.
- Hardware
- OpenSCAD
- TPU
- Microneedles
projects (8)
Agnes — A 24/7 Digital Employee for Heartland Merchants
Jun 22, 2026
MathScribe — Handwritten Maths to LaTeX in Under a Second
May 18, 2026
SOAR — A Voice-Directed Surgical Co-Pilot
May 2, 2026
ContextGuard — Credibility Checks Before You Click
Mar 21, 2026
Lifeline / Quickly-Draw! — A Sub-S$10 Open-Source Blood Sampler
Mar 20, 2026
SENTINEL — Catching Fake Content Before It Spreads
Feb 14, 2026
NeuPoster — AI Classroom Posters on a $3 Display
Aug 30, 2025
Retractiles — Tactile Paving That Gets Out of the Way
Jul 12, 2025
writing (12)
Two Years of Commits, Read Back
Jul 25, 2026
Trying to Bring the Anthropic Partner Network to My School
Jul 14, 2026
A Thousand Cups of Phin Coffee
Jul 2, 2026
Creating Luck Through Volume
Jun 8, 2026
Notes from SAIL: Cross-Cultural Engineering in Southeast Asia
Feb 2, 2026
A Year as Leo Club Secretary: Minutes, Proposals, and 5.45am
Jan 15, 2026
What to Expect from Engineering Science (An Answer to Secondary Four)
Jan 6, 2026
Presenting Research to the Deputy Prime Minister
Dec 10, 2025
Teaching EV3 Robotics to Underprivileged Students
Oct 18, 2025
The Fraction Is Not the Problem
Sep 5, 2025
Learning to Not Help: Notes from a Makerspace
Jun 14, 2025
Ben Tre, and the Things I Assumed
May 20, 2025
Elsewhere
- GitHub
- github.com/lohjo
- linkedin.com/in/lohjohnray
- hello@johnrayloh.com