CTO · Electronics Engineer · Robotics, IoT & Tech Education
For more than 10 years I've built hardware products end to end: from the PCB schematic to firmware, backend and the deployed product. Two-time CTO, designer of boards for space applications, and leader of the Arduino Guatemala community. My mission is to bring technology to the people who need it most, even schools without internet.
Newest first. Some were built for companies I worked at; each card says so.
A 3D robot head you talk to by voice: it listens with Whisper, answers with a vision model that can see your camera or the images you share, and lip-syncs to Spanish speech. It runs in the browser, including on phones, and its personality can be changed from the interface.
Web platform for scoring projects at hackathons and events with multiple judges: weighted criteria, a unique link per judge, a 0–100 ranking, and feedback for each team without exposing scores. Runs for free on Cloudflare Workers with a D1 database, and the browser never receives any keys.
Chat-based medical guidance for remote villages without cell coverage. An ESP32 node with a LoRa radio gives the village its own WiFi, and queries travel compressed to a hub where a medical model (MedPsy-4B) runs 100% locally. Data never leaves the community, and answers in K'iche' are validated by the community itself.
A flora encyclopedia for a school. Visitors scan a QR code or NFC tag next to each tree to open its profile, with its scientific name and Maya meaning. ESP32 stations monitor the environment in real time. Everything runs on the local network, no internet needed.
Reverse engineering of the 360×360 rear panel on this Android 15 phone. I found it isn't an Android display but an RGB565 framebuffer drawn through JNI, and managed to turn it on and off and show custom text without root, using a Python tool and an app built without Android Studio. Includes a retrospective on what worked and what didn't.
Interactive website presenting the nahuales of the Maya calendar and their associated stones.
Editor and solver for control-system block diagrams. Draw the diagram and get the exact, symbolic transfer function C(s)/R(s) via Mason's gain formula, watching Δ being built term by term. Backed by 95 automated tests.
Humanoid robot combining computer vision, natural language processing, speech synthesis and servo control, with manual and network control modes.
Python server that receives audio recorded by the robot over TCP, processes it and sends back the spoken reply for the bot to play.
Educational electronics game for 6- to 8-year-olds who can't read yet: you understand it by seeing, not reading. A snake stands for the current, and the player guides it through a battery, resistor, capacitor and switch until the LED lights up. Includes a shop, progression, an in-game economy and a level editor. It started as a Godot 4.6 prototype and evolved into Phaser.
Hands-on video series: how a soldering iron works, what's in the kit, assembling the base, exercises on joints and polarity, measuring LEDs and resistors, and first steps in KiCad.
Open tutorials on STEAM, robotics and electronics for schools and educational institutions.
Automatically builds Apex Legends tournament leaderboards from screenshots. Vision AI (Gemini or Groq) reads team, placement and kills, and scores them with the ALGS system. Bilingual, with PNG export.
Code and examples from my workshops: IoT with the ESP8266, digital communications with Arduino for beginners, and a real-time web dashboard using MQTT and WebSockets (ESP8266 + DHT22).
Servo and DC motor control board based on the XIAO ESP32-C3.
CanSat and air-quality monitoring station.
Complete documentation to build, replicate and improve a water-quality monitoring station developed within a SINCYT project.
5×5 cm telemetry board with 500 km range, a solar energy-harvesting system and a coil driver to simulate Earth's magnetic field. PCBs of up to 4 layers in KiCad, with EMC testing.
A device that deploys a local wireless network with educational content so children and teens in schools without internet can use it. Hybrid servers sync whenever a connection is available.
Free, openly accessible projects and resources about MQTT.
Open, low-cost device for blind people. It detects obstacles with ultrasound and warns through vibration. Designed so anyone with a 3D printer can build it.
International speaker for more than 10 years in Guatemala, El Salvador, Nicaragua and Costa Rica. These are the most recent.
Competed with Tinimit: medical guidance powered by 100% local AI for villages without coverage, connected over LoRa.
I organized the community's biggest edition in 14 years, with Arduino co-founder David Cuartielles as keynote, speakers from across Latin America, and parallel talks and workshops in classrooms and labs. I also built the event website with the schedule.
Introductory workshop on wiring and programming basic electronic components in a simple, fun way.
Hands-on workshop on robotics applied to industry.
A program of 3-day in-person hackathons where young people solve real problems in their communities with AI, backed by PRONACOM, ProGuatemala and MINECO. Includes the INTECAP hackathon in Santa Lucía Cotzumalguapa and a workshop facilitation manual.
National technology training and hackathon program that I lead at Creabot.
Talk with example code on interrupts, graphics mode, text mode and loops using the stack.
Hardware project, talk, workshop or collaboration? Message me on LinkedIn.
Guatemala · Sacatepéquez · Available for remote work