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R&D · Prototyping space

Engineering Lab

Hypotheses tested, boundaries pushed, and architectures broken. This is where I document raw technical experiments before they become projects — things tested, measured, compared, broken and investigated across local AI, Linux, networking and backend systems.

PostgreSQL Engine:Neon Serverless
Tools:12 SaaS
Arcade:5 Modes
Prompts Copied:480+
Edge Latency:< 15ms
Bench log

Experiments & prototypes

Ongoing bench tests across infrastructure, local AI, Linux systems, hardware and creative tech — filter by discipline or try the terminal.

sabbir.nav.bd — bash
Welcome to SABBiR_OS [Version 5.2.14]
Type 'help' to see available commands.
:~$
AI LabActive2026

Offline LLM VRAM Offloading Benchmarks

Measuring token generation speeds and memory fragmentation across quantized 7B/8B GGUF models on dedicated GPU hardware using Ollama.

OllamaCUDAGGUFVRAM Optimization
Hardware LabPrototyped2025 - 2026

Custom Uninterruptible Power Supply (UPS) Rig

Engineered a custom high-capacity backup DC supply system with automated relay cutover to keep network nodes and compute rigs online during brownouts.

Battery ManagementRelay SwitchingSolar DC InverterPower Electronics
Systems LabActive2026

Idempotent Ubuntu Workstation Bootstrapper

A modular GNU Bash provisioning suite that configures a fresh Ubuntu installation with dotfiles, developer toolchains, Docker, and kernel sysctl parameters in under 4 minutes.

GNU BashUbuntuSysctlDotfilesSystemd
Infrastructure LabTesting2025 - 2026

OpenWrt / Routing & Local Storage Testbed

Configuring custom router firmware with QoS traffic prioritization, DNS-over-HTTPS, and lightweight network-attached storage benchmarks.

OpenWrtQoS QueuesDNS-over-HTTPSSambaLinux Networking
Creative LabDocumented2025

Multi-Camera Virtual OBS Signal Router

Built a low-latency multi-angle camera switching pipeline using OBS Studio, virtual loopback devices, and hardware capture cards for broadcast production.

OBS StudioVirtual CamA/V SynchronizationHardware Encoding
Hardware LabDocumented2024 - 2025

Discrete Multi-Transistor Audio Amplifier Circuit

Designed and soldered a discrete power amplifier using high-current bipolar junction transistors, passive filters, and dual-rail power regulation.

BJT TransistorsAnalog Circuit DesignSolderingHeat Dissipation