Printing sand
Sand binder-jet 3D printer
A Voron that learned to print sand.
Hardware prototypes, start to finish: circuits, firmware, mechanical design.
I’m Iqbal Samin Prithul, a freelance hardware engineer and electrical engineering student at BME, based in Budapest.
Taking new projects
Firmware
I tune 3D printers with Marlin and Klipper, and bring up new boards with the Arduino core, ESP-IDF and other platforms.
CH1 SCK · CH2 MOSITRIG'D ↑CH1
SPI · AC 53 00 00 · Programming Enable
Projects
Printing sand
Shown at GITEX
Kitchen-robot electronics
Three years of remote R&D for a robot that cooks.
247 orders
3D printer firmware
Marlin and Klipper for 80+ printer models.
700+ users
Abhash smart-cane device
Obstacle alerts for white-cane users, designed from scratch.
Delivered
Voron 2.4 for Khulna University
A fast CoreXY printer, built and tuned for university research.
WRO bronze
Self-driving robot car
Bangladesh’s first bronze at the World Robot Olympiad.
Grand Prize
3D-printed RC glider
Designed in Fusion 360, printed on my own printer, and it flies.
Open source
ESP32 precision wattmeter
Two units graph a power supply’s efficiency live.
My homemade 3D printers
I built my first in 2020, before I’d seen one in real life.
Bench power electronics
A 200 W+ DC load and a buck-boost converter I designed myself.
Self-balancing robot
Two wheels, one PID loop, tuned live from a phone.
CNC hot-wire foam cutter
Cuts the wings for my RC planes.
5-inch racing drone
Built, tuned and occasionally crashed.
What I do
U1
Firmware
I tune 3D printers with Marlin and Klipper, and bring up new boards with the Arduino core, ESP-IDF and other platforms.
U2
Electronics
Custom electronics projects with schematic and PCB design, SPICE simulation, embedded hardware and more.
U3
Custom systems
Special-purpose 3D printers, motion systems, complete process control, test rigs and more.
How a project runs
- 01Short callFree, no strings attached
- 02ProposalFixed scope and milestones
- 03BuildWeekly photo updates
- 04Test reportMeasured, not guessed
- 05HandoffSource files, CAD and docs
What clients say
All reviews on Fiverr →247orders on Fiverr
5.0★from 142 reviews
700+people use a device I designed
3 yrsremote R&D for a US startup
“Prithul spent countless hours solving puzzle after puzzle, problem after problem, designing out-of-the-box 3D models … and all while communicating progress at a very high level.”
“Knows his stuff, incredibly responsive, excellent quality work. Can’t recommend highly enough.”
“…you are very intelligent my friend. If anybody needs any help, this is the guy.”
“Excellent communication and speed of delivery.”
Experience
- 2022–nowFreelance hardware engineerFiverr and direct clients
- 2022–25R&D contractorChefee Robotics, remote
- 2023–25Co-founder, R&D leadDrishti Technologies
- 2023–24Exchange yearFox Valley Tech · US State Dept program
- 2024Engineering apprenticeAbel Manufacturing
- 2025–28BSc Electrical EngineeringBME, Budapest
Hi, I’m Prithul.
I learned electronics on bare chips with a borrowed USBasp programmer, then built my own. The 6-pin ISP header became my logo.
Today I build hardware for clients while studying at BME.
- Bangladesh → Japan → Wisconsin → Budapest
- English · Bengali · Japanese
Got a project in mind?
Taking new projects
Based inBudapest, Hungary · CET
Not sure yet?Email me a rough idea. A sketch or a photo is enough.