Build. Test. Share.

Practical Engineering.
Built, Tested, Shared.

Open-source projects, engineering guides and real-world experiments across embedded systems, CNC, automation and motion control.

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About JustLast
290+Articles
15+Years in Lab
8Domains

Engineering Domains

Pick a domain and start reading.

E

Electronics & Embedded

STM32, Arduino, ESP32, sensors

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C

CNC & Machining

LinuxCNC, toolpaths, calibration

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D

CAD / CAM

SolidWorks, Fusion 360, post processors

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T

Engineering Tutorials

Protocols, controllers, systems

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I

IoT & Smart Systems

Matter, Thread, sensors

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W

Workshop & Tools

Practical workshop engineering

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Featured Engineering

Recent deep dives from the lab.

Industrial Automation

Neuron Industries Cortex AIC: Python-Programmable Industrial Controller

Y Combinator-backed controller replaces ladder logic with Python and AI-powered control design. A look at what this means for PLC programming.

Aug 26, 2026 · 12 min read

CNC & Machining

CNC Material Selection Guide

Aluminium, steel, titanium — feeds, speeds, and tooling for every material class.


Electronics & Embedded

SPI Communication Protocol Guide

Clock modes, chip select, full-duplex — from basic SPI to multi-slave bus topologies.

How I Build

The engineering philosophy behind JustLast.

Real Hardware

Actual machines, sensors and controllers. No simulated data.

Open Source

Code, schematics, designs shared freely.

Tested & Documented

Measurements, scope captures, real test results.

From India

Bhiwani, Haryana — shared globally.

The Engineer Behind JustLast

Virender Kumar runs JustLast alongside his engineering businesses. With 15+ years in electronics, mechatronics and motion control, he builds real systems and documents the engineering process here.

JustLast is the knowledge arm. The commercial work happens through Neway & Velton Pvt. Ltd. — motion control systems, linear actuators, conveyor systems, and operating theatre equipment.

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Engineering Products & Solutions

Custom motion control systems, servo motors, linear actuators, conveyor systems, and OT equipment — built by Neway & Velton Pvt. Ltd.

Visit Neway & Velton →

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JustLast is an independent engineering lab and knowledge platform by Virender Kumar covering STM32 microcontroller projects, Arduino tutorials, ESP32 builds, LinuxCNC conversions, CNC machining guides, CAD/CAM workflows, industrial automation, servo motor and linear actuator systems, motion control engineering, embedded systems development, smart home IoT, and open-source engineering projects. Based in Bhiwani, Haryana, India.