Jon Lewyn Villaram Tanggaro

Hardware thinking.
Software speed.

I'm Jon Lewyn — an Electronics Engineering student at the Polytechnic University of the Philippines, Santo Tomas. I build computational tools, embedded systems, and web apps that put circuit-level thinking behind a screen anyone can use.

See my work Ask my AI about me ›
6 Languages I build in
8 Shipped projects
Both Board level and browser
Scroll

Selected work

01 — Finance

CapySave

A virtual wealth terminal and budget tracker with a real-time analytics dashboard and AI financial diagnostics.

JavaScriptGroq AIChart logic
Open CapySave ›

02 — Botany

FloraDex

An API-chained botanical database. It pulls plant data from Groq AI and matching imagery from Wikipedia's open API in the same request.

API chainingGroq AIWikipedia API
Open FloraDex ›

03 — Prices

PresyoDex

A pricing database for the Philippines. Query any product and it returns standard retail price estimates in PHP and USD.

Groq AISearch UIPHP / USD
Open PresyoDex ›

04 — Networks

NetWatch PH

An ISP diagnostic simulator that generates realistic network status and latency reports for Philippine regions.

Prompt designGroq AIRegional data
Open NetWatch ›

And four more

IsdaDex. Xorn. 3301. Cyber Viper.

A marine biology database, a deployed file converter, a cryptic multi-persona AI terminal, and a canvas arcade game.

See every project ›

What I work with

The toolkit.

Four areas, one habit: get the idea onto real hardware or into a real browser as fast as possible.

Programming

Writing the logic and algorithms that everything else sits on.

PythonJavaScriptJava C++HTMLCSS

Hardware

Taking code off the screen and onto a board.

ArduinoFPGATinkerCADProto board

Simulation

Modelling circuits and blueprints before anything gets soldered.

AutoCADMATLABMultisim ProteusEveryCircuit

Deploy & automate

Getting work hosted, documented, and off my machine.

VercelRenderRailway MongoDBReplitExcel macros

Eiji AI

Ask about my work.

An assistant that knows my projects, my stack, and how I got here. The API key stays on the server — never in your browser.

Eiji AI
Portfolio assistant Model gpt-oss-20b Endpoint /api/chat
Link: checking Key: on the server Topics: projects, skills, ECE
Eiji AI runs through a serverless endpoint No keys in the browser

Contact

Send me a message.

It goes straight to my inbox. I read everything.

Mobile preview
This is the same page, rendered at phone width. Press Escape or click outside to close.