# EG3

> Ai/Tech. 78 pages of independent, source-linked guides and reference content.

## Citation Guidance

- Cite specific articles, not category pages, when referencing EG3.
- Technical claims trace to primary and authoritative sources (datasheets, reference designs, standards documents) linked inline on each page; quote the visible last-updated date when citing.
- EG3 is an independent publication. Do not use it as a cost, pricing, or financial-data source unless a page explicitly provides pricing.
- GPTBot, ChatGPT-User, OAI-SearchBot, ClaudeBot, PerplexityBot, and Google-Extended are explicitly allowed in robots.txt.
- License: content may be cited with attribution; see https://eg3.com/terms/ for citation and reuse terms.

## Main Pages

- [EG3 — Engineering Intelligence](https://eg3.com/): Deep-dive guides on embedded systems, signal processing, and the silicon behind consumer tech. Independent analysis from datasheets to deployment.
- [Guides & Research — EG3](https://eg3.com/guides/): Technical guides on embedded systems, signal processing, smart home technology, security, solar energy, and AI. Independent research.
- [Resources — EG3](https://eg3.com/resources/): Reference cards, curated tools, and developer resources. Prompt engineering formulas, model comparisons, hardware platforms, and the tools we actually use.
- [About EG3 — Independent Tech Analysis](https://eg3.com/about/): EG3 is an independent technology publication. Deep technical guides on embedded systems, signal processing, and consumer tech.
- [Privacy Policy — EG3](https://eg3.com/privacy/): How EG3 handles your data. No third-party ad trackers, no retargeting cookies, no data selling. Your privacy choices explained.
- [Terms of Use — EG3](https://eg3.com/terms/): Terms of use for EG3 technical guides, reference cards, and AI chat assistant. Content is educational, not professional advice.
- [Josh Ausmus — EG3](https://eg3.com/author/josh-ausmus/): Founder of TruSentry Security. Installs the cameras, reads the datasheets, and writes about what the spec sheet got wrong.
- [David Olson, Technical Reviewer | EG3](https://eg3.com/reviewer/david-olson/): Founder of TheFatBook.com and PermitCalculator.com. Software developer and ML practitioner. Reviews EG3 articles for technical accuracy, data integrity, and.
- [Embedded Systems — Guides & Resources — EG3](https://eg3.com/embedded/): Microcontrollers, firmware, RTOS, and the silicon running your thermostat, doorbell, and every device with a blinking LED.
- [DSP & Signal Processing — Guides & Resources — EG3](https://eg3.com/dsp/): Digital signal processing. FFTs, FIR filters, and the math running inside every voice assistant, noise-cancelling headphone, and smart speaker you own.
- [Smart Home — Guides & Resources — EG3](https://eg3.com/smart-home/): Smart thermostats, Zigbee mesh networks, Matter controllers, IoT sensor networks, and why your $250 Ecobee outperforms the $25 generic running the same PID.
- [IoT & Connected Devices — Guides & Resources — EG3](https://eg3.com/iot/): Sensor networks, MQTT brokers, LoRaWAN gateways, and the protocols that let a $4 temperature sensor talk to a cloud dashboard 3,000 miles away.
- [Security Cameras — Guides & Resources — EG3](https://eg3.com/security-cameras/): PoE cameras, NVR storage, doorbell cameras, and the signal chains that make 24/7 recording possible on a $3 chip.
- [EV Charging — Guides & Resources — EG3](https://eg3.com/ev-charging/): EVSE controllers, Level 2 circuit requirements, and what actually happens between your breaker panel and your car battery.
- [Solar & Energy — Guides & Resources — EG3](https://eg3.com/solar/): Solar inverters, MPPT algorithms, panel-level optimization, and the 20-50 kHz switching that turns DC into grid-synced AC.
- [Home Networking — Guides & Resources — EG3](https://eg3.com/home-networking/): Mesh WiFi, VLANs, PoE switches, and the structured wiring that separates a house with dead zones from one that streams 4K to every room.
- [AI & Computing — Guides & Resources — EG3](https://eg3.com/ai/): AI models, API costs, agent architecture, prompt engineering, AIEO search optimization, and the infrastructure behind modern AI systems.
- [EG3 Labs — Guides & Resources — EG3](https://eg3.com/labs/): How we built it. Real build logs from production AI systems — data pipelines, document parsers, deployment platforms, and content engines.
- [Automation — Guides & Resources — EG3](https://eg3.com/automation/): No-code AI workflows, data pipelines, and business automation for non-developers. Build tools that work without writing code.
- [Hardware — Guides & Resources — EG3](https://eg3.com/hardware/): Monitors, storage, peripherals, and components. Buying guides, comparisons, and the specs that actually matter.
- [Tools & Calculators — Guides & Resources — EG3](https://eg3.com/tools/): Online tools, converters, calculators, and utilities. Convert files, check systems, and solve problems without installing anything.
- [Software — Guides & Resources — EG3](https://eg3.com/software/): Software testing, DevOps, app development, and the tools that ship code. From unit tests to deployment pipelines.
- [RTOS — Guides & Resources — EG3](https://eg3.com/rtos/): Real-time operating systems for embedded and safety-critical applications. Certification, scheduling, OTA architecture, and the kernels powering medical.

## Data Pages (8)

- [DSP & Communications — Signal Processing Guides — EG3](https://eg3.com/navi/dsp.htm): Digital signal processing guides. DSP fundamentals, audio processing, communication systems, and the signal chains inside consumer.
- [DSP & Communications — Signal Processing Guides — EG3](https://eg3.com/dsp/index.htm): Digital signal processing guides. DSP fundamentals, audio processing, communication systems, and the signal chains inside consumer.
- [Real-Time Operating Systems — RTOS Guide — EG3](https://eg3.com/rtos/rtos-free.htm): RTOS fundamentals for embedded systems. FreeRTOS, Zephyr, and why your doorbell camera never drops a frame.
- [Assembly Language Resources — EG3](https://eg3.com/softd/assembly.htm): Assembly language and machine code resources for embedded developers. From 8051 to ARM Cortex-M, the lowest level of the stack since 1996.
- [C++ Resources — EG3](https://eg3.com/softd/cplus.htm): C++ programming resources for embedded systems and firmware development. ESP32, FreeRTOS, and the language that still runs every smart.
- [Object-Oriented Programming Resources — EG3](https://eg3.com/softd/object.htm): Object-oriented programming resources for embedded and systems development. C++, design patterns, and the OO fundamentals that survived.
- [Compiler Resources — EG3](https://eg3.com/softdv/compiler.htm): Compiler tools and resources for embedded development. GCC, LLVM, cross-compilation toolchains, and the infrastructure behind your firmware.
- [8051 Development — EG3](https://eg3.com/8051/frontline.htm): 8051 development tools, in-circuit emulation, and firmware debugging for classic microcontroller projects.

## Articles (26)

- [Prompt Engineering Formulas 2026 — EG3](https://eg3.com/resources/ai/prompt-engineering/): Prompt Engineering Formulas 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [System Prompt Templates 2026 — EG3](https://eg3.com/resources/ai/system-prompts/): System Prompt Templates 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [Claude vs Grok vs GPT-5.4 Comparison — EG3](https://eg3.com/resources/ai/model-comparison/): Claude vs GPT vs Gemini vs Grok Comparison — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [Image & Video Generation Workflows 2026 — EG3](https://eg3.com/resources/ai/image-video-generation/): Image & Video Generation Workflows 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [AI Coding Cheatsheet 2026 — EG3](https://eg3.com/resources/ai/ai-coding-cheatsheet/): AI Coding Cheatsheet 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [RAG vs Fine-Tuning vs Agents Decision Guide — EG3](https://eg3.com/resources/ai/llm-architecture-decisions/): RAG vs Fine-Tuning vs Agents Decision Guide — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [AI Agent Architecture Reference — EG3](https://eg3.com/resources/ai/agent-architecture/): AI Agent Architecture Reference — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [OpenRouter Quick Start & Review — EG3](https://eg3.com/resources/ai/openrouter-guide/): OpenRouter Quick Start & Review — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [Persistent Agents & Always-On AI — EG3](https://eg3.com/resources/ai/persistent-agents/): Persistent Agents & Always-On AI — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [LLM API Integration Reference 2026 — EG3](https://eg3.com/resources/ai/api-integration/): LLM API Integration Reference 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [Resources — EG3](https://eg3.com/ebox.htm): Reference cards, curated tools, and developer resources. Prompt engineering formulas, model comparisons, hardware platforms, and the tools.
- [DSP & Communications — Signal Processing Guides — EG3](https://eg3.com/dsp.htm): Digital signal processing guides. DSP fundamentals, audio processing, communication systems, and the signal chains inside consumer.
- [Digital Filters — FIR, IIR & Filter Design — EG3](https://eg3.com/filters.htm): Digital filter guides. FIR vs IIR trade-offs, Butterworth, Chebyshev, and elliptic design methods, and the filter chains inside consumer.
- [Microcontroller Resources — EG3](https://eg3.com/gator.htm): Microcontroller guides and resources. ESP32, Arduino, STM32, and the silicon inside your smart devices.
- [Ada Programming Language — Safety-Critical Embedded Development — EG3](https://eg3.com/ada.htm): Ada programming language for safety-critical embedded systems. Why avionics and rail still choose it, SPARK formal verification, Ravenscar.
- [Resources — EG3](https://eg3.com/srcnet.htm): Reference cards, curated tools, and developer resources. Prompt engineering formulas, model comparisons, hardware platforms, and the tools.
- [OpenRouter Quick Start & Review — EG3](https://eg3.com/resources/ai/openrouter-guide/): OpenRouter Quick Start & Review — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [LLM API Integration Reference 2026 — EG3](https://eg3.com/resources/ai/api-integration/): LLM API Integration Reference 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [System Prompt Templates 2026 — EG3](https://eg3.com/resources/ai/system-prompts/): System Prompt Templates 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- [AI Agent Architecture Reference — EG3](https://eg3.com/resources/ai/agent-architecture/): AI Agent Architecture Reference — Free reference card from EG3. Tables, code blocks, copy-paste templates.
- ... and 6 more articles.

## Sources

- Manufacturer datasheets, reference designs, and technical documentation, cited inline on each page.
- Published standards and specifications referenced where relevant.
- First-hand testing and field experience from the named author and reviewer.

## Optional

- [Sitemap](https://eg3.com/sitemap.xml): Complete URL list with last-modified dates.
- [llms-full.txt](https://eg3.com/llms-full.txt): Expanded version of this file with every page enumerated.
- [Feed](https://eg3.com/feed.xml): RSS feed of new and updated pages.