Kolkata, India · 17 · rev. 2026
Souptik
Samanta.
I design circuit boards, build 3D printers and write the firmware that runs on them. I started with HTML at eleven and haven’t stopped making things since.
Things I made
- U1
HackDucky
RP2040 / KiCad / Firmware / Python · 2025 · 13 stars
A pocket-sized USB keystroke-injection tool for automation and authorized security testing. Custom RP2040 board, custom firmware, and a payload scripting language.
Fig. 1 — The assembled board, rev 1 - U2
Chaos Compiler
Fusion 360 / Klipper / KiCad / Raspberry Pi · 2025 · 10 stars
A from-scratch CoreXY / Cartesian hybrid 3D printer: 310×310×380 build volume, Klipper on a Pi 4, multicolor printing, auto bed leveling and a servo that kicks finished prints off the bed. Funded by the Hack Club Infill grant.
- U3
Sensor Node
STM32L0 / LoRa / KiCad / C · 2026
A low-power outdoor environmental node on an STM32L052: temperature and humidity sensing, onboard storage and a header for an external SX1262 LoRa module. Designed so one custom board replaces a pile of dev boards.
Fig. 3 — Out in the sun with an 18650 and the LoRa module fitted - U4
Infrared Gun
STM32F103 / USB-C / KiCad / CAD · 2025 · 6 stars
A non-contact thermometer with a very wide range. STM32F103 with USB-C, RTC, broken-out GPIO and a custom 3D-printed case.
Fig. 4 — KiCad 3D render of the main board
Smaller things
- µBeatSTM32G0, KiCad
16-LED PWM heart module on an STM32G031, powered straight from a CR2032. High-frequency multiplexing and controlled duty cycling give a realistic heartbeat on a coin cell.
Filament DryerKiCad, CAD, C++Custom PCB plus a self-centering spool holder. Controls fans, monitors temperature and drives modular PTC heaters, so the heater is easy to swap or upgrade.
2026source
LazyControllerESP, Relays, C++A WiFi relay board so I never have to walk up to a switch again. Toggle lights, fans or pumps from a phone or browser.
2026source- Fume ExtractorCAD, 3D printing, Power
Desk solder-fume extractor: a 12025 fan pulling air through a carbon filter, USB-C PD or DC jack in, simple control. No overthinking.
2026source - N20 Motor MountCAD, 3D printing
Gear motor mount with a Pinecil holder, designed around N20 datasheets after a lot of trial and error on hole spacing and tolerances.
2026source 
ESP32-C3 Dev BoardESP32-C3, KiCadA compact custom ESP32-C3 board: USB-C, BOOT and EN buttons, PCB trace antenna and a UART header, with 0402/0603 passives.
2026source- ZephyrStationESP32-C3, TFT, C++
DIY weather station on a custom PCB with a Wemos C3 and a 1.8" TFT, pulling live data from the OpenWeatherMap API.
2025source - Hydroponics NodeNode.js, ESP32, REST
Node.js API that polls an ESP32 every 10 seconds, backs readings up to JSON, serves them over HTTP and can switch the water pump.
2025source - Soup Pad / 88-key KeyboardKiCad, Python, CAD
Custom macropad and a full 88-key mechanical keyboard with its own PCB, case and BOM.
- Walkie TalkieRF, KiCad
A handheld two-way radio, documented in a build journal.
- Off-grid CCTVESP32, WiFi
A cheap, off-grid camera. Several can join one router over WiFi and be monitored together.
2025source - SU-57 PCBKiCad, Art PCB
A PCB shaped like an SU-57 that blinks and glows when it gets dark.
- Julius: a small LLMPyTorch, Python, Hugging Face
A GPT-style model I trained from scratch on Colab. It took six Google accounts and 18 hours of 3-hour GPU slots. Published on Hugging Face.
- BillGenHTML, CSS, JavaScript
Multi-theme bill and business card generator with three themes and smooth animations.
- Hack Club Reviewer ToolsHTML, JavaScript
Small tools I built for reviewing Hack Club Arcade projects.
Plus 100+ repos of half-finished experiments on github.
About
I’m 17 and live in Kolkata. Six years ago I made my first web page; now most of what I make ends up on a soldering station. The 3D printer on this page, Chaos Compiler, I designed myself and it still surprises me that it prints.
A lot of my projects come through Hack Club, where I’ve built for Infill, OnBoard and Blueprint, and where I review other teenagers’ projects as a volunteer.
Lately I’m into small, low-power boards (STM32, LoRa) and low-level code. Next I want to get properly into machine learning and security.
“A good world is where learning is available to all, no matter what their age, gender, creed or race is.”
What I use
- hardware
- KiCad, PCB design, STM32, ESP32, RP2040, LoRa, Soldering
- mechanical
- Fusion 360, 3D printing, CoreXY, Klipper, Enclosure design
- software
- TypeScript, JavaScript, React, Node.js, Express, Python, C / C++
- learning
- AI / ML, Cybersecurity, Low-level / embedded
People say
“Delivered a complex payment integration ahead of schedule. His attention to detail and problem-solving skills are remarkable.”
“Souptik's PCB skills are exceptional, great innovator.”
Contact
Want to talk about a board, a printer, or something you’re building? Write to me at me@souptik.me.