# EG3, full page index

> Complete enumeration of all 85 pages. For the summarized version, see llms.txt.

## All Pages

### EG3 — Engineering Intelligence
URL: https://eg3.com/
Description: Deep-dive guides on embedded systems, signal processing, and the silicon behind consumer tech. Independent analysis from datasheets to deployment.

### 8051 Development — EG3
URL: https://eg3.com/8051/frontline.htm
Description: 8051 development tools, in-circuit emulation, and firmware debugging for classic microcontroller projects.

### About EG3 — Independent Tech Analysis
URL: https://eg3.com/about/
Description: EG3 is an independent technology publication. Deep technical guides on embedded systems, signal processing, and consumer tech.

### Ada Programming Language — Safety-Critical Embedded Development — EG3
URL: https://eg3.com/ada.htm
Description: Ada programming language for safety-critical embedded systems. Why avionics and rail still choose it, SPARK formal verification, Ravenscar tasking, and how to start with GNAT.

### AI & Computing — Guides & Resources — EG3
URL: https://eg3.com/ai/
Description: AI models, API costs, agent architecture, prompt engineering, AIEO search optimization, and the infrastructure behind modern AI systems.

### AI Chatbot Development Services Cost $5K-$200K
URL: https://eg3.com/ai/ai-chatbot-development-services/
Description: AI chatbot development services cost $5K-$200K in 2026. Basic bots run prompts on one LLM. High-end handle RAG, routing, logs, integrations across providers.

### OBD2 Codes Explained: How AI Diagnostics Are Changing DIY Car Repair
URL: https://eg3.com/ai/obd2-codes-ai-diagnostics-diy-car-repair/
Description: OBD2 Codes Explained: How AI Diagnostics Are Changing DIY Car Repair. Five-character DTC format, CarMD top-10 common codes, where ChatGPT and Carly AI help or hurt, CAN bus technical layer, and the privacy risk Bluetooth OBD2 dongles introduce.

### Josh Ausmus — EG3
URL: https://eg3.com/author/josh-ausmus/
Description: Founder of TruSentry Security. Installs the cameras, reads the datasheets, and writes about what the spec sheet got wrong. Read all guides by Josh Ausmus on EG3.

### Automation — Guides & Resources — EG3
URL: https://eg3.com/automation/
Description: No-code AI workflows, data pipelines, and business automation for non-developers. Build tools that work without writing code.

### DSP & Signal Processing — Guides & Resources — EG3
URL: https://eg3.com/dsp/
Description: Digital signal processing. FFTs, FIR filters, and the math running inside every voice assistant, noise-cancelling headphone, and smart speaker you own.

### DSP & Communications — Signal Processing Guides — EG3
URL: https://eg3.com/dsp.htm
Description: Digital signal processing guides. DSP fundamentals, audio processing, communication systems, and the signal chains inside consumer technology.

### Audio DSP in 2026, CPU Limits and Timing Tradeoffs
URL: https://eg3.com/dsp/audio-dsp-how-your-sound-system-processes-every-note/
Description: Audio DSP in 2026 explains why 1 sample deadline math favors MAC-heavy cores over CPUs, with timing, power, and scheduler tradeoffs that change design

### Digital Filter Design: Balancing Performance and Constraints
URL: https://eg3.com/dsp/digital-filter-design/
Description: Digital filter design balances stopband attenuation, phase response, load and stability against hardware constraints. The DSP signal chain maps to FIR, IIR and

### Digital Signal Processing in 2026
URL: https://eg3.com/dsp/digital-signal-processing-a-general-overview/
Description: Learn how digital signal processing works in broad terms, with 2026 context and bench-level examples from camera, audio, and sensor pipelines.

### Digital Signal Processor: 2026 Specs and Tradeoffs
URL: https://eg3.com/dsp/digital-signal-processor-what-it-is-and-why-it-exists/
Description: Digital signal processor breakdown for 2026: single-cycle MAC throughput, one per clock tick, with cost data and setup tradeoffs from field tests.

### FFT: 2026 Specs, Costs, and Tradeoffs
URL: https://eg3.com/dsp/fft-explained-fast-fourier-transform-for-engineers/
Description: FFT in 2026 gets clear fast. See why O(N log N) replaced O(N squared), with the 2048 point run that finished in 0.02 minutes.

### FIR Filter: 2026 Specs and Tradeoffs
URL: https://eg3.com/dsp/fir-filter-explained/
Description: Understand FIR filter operation in 2026. We detail tap counts, coefficient loading, and the 256-value touch per sample, contrasting with IIR. Field

### How AI Chips Evolved from Basic DSP Processors 2026
URL: https://eg3.com/dsp/how-ai-chips-evolved-from-basic-dsp-processors/
Description: How AI Chips Evolved From Basic DSP Processors in 2026, with 2026 source-backed architecture shifts, measured throughput, power tradeoffs, and price

### How DSP Powers Every Smart Home Device You Own
URL: https://eg3.com/dsp/how-dsp-powers-every-smart-home-device-you-own/
Description: How DSP Powers Every Smart Home Device You Own. DSP in MCUs samples analog signals via ADCs and runs real-time math to issue commands to motors and switches.

### IIR Filter: 2026 Specs, Stability, and Tradeoffs
URL: https://eg3.com/dsp/iir-filter-explained/
Description: IIR filter behavior in 2026 starts with feedback. See why fewer coefficients can get steeper rolloff, and how 1 bad pole placement can destabilize it.

### DSP & Communications — Signal Processing Guides — EG3
URL: https://eg3.com/dsp/index.htm
Description: Digital signal processing guides. DSP fundamentals, audio processing, communication systems, and the signal chains inside consumer technology.

### Nyquist Theorem: 2026 Specs, Limits, and Aliasing
URL: https://eg3.com/dsp/nyquist-shannon-sampling-theorem/
Description: Nyquist theorem in 2026, with the 1949 source, aliasing limits, and what the math actually guarantees when you sample an analog signal.

### The Engineering Behind Solar Inverters: How Signal Processin
URL: https://eg3.com/dsp/the-engineering-behind-solar-inverters-how-signal-processing-maximizes-output/
Description: The Engineering Behind Solar Inverters: How Signal Processing Maximizes Output. Signal processing uses MPPT to maximize solar output and ensure grid sync.

### Resources — EG3
URL: https://eg3.com/ebox.htm
Description: Reference cards, curated tools, and developer resources. Prompt engineering formulas, model comparisons, hardware platforms, and the tools we actually use.

### Embedded Systems — Guides & Resources — EG3
URL: https://eg3.com/embedded/
Description: Microcontrollers, firmware, RTOS, and the silicon running your thermostat, doorbell, and every device with a blinking LED.

### Soldering Iron Buyer’s Guide 2026: From $25 Pinecil to $$$ JBC
URL: https://eg3.com/embedded/best-soldering-iron-2026/
Description: Soldering Iron Buyer’s Guide 2026: From $25 Pinecil to $$$ JBC. Find out which iron is the right one for your needs and budget

### FPGA vs Microcontroller: Which Runs Your Smart Home Hub
URL: https://eg3.com/embedded/fpga-vs-microcontroller-which-runs-your-smart-home-hub/
Description: FPGA vs Microcontroller: Which Runs Your Smart Home Hub. Microcontrollers suit the I/O-bound protocol translation across radios in smart home hubs unlike FPGAs.

### From Microcontrollers to Smart Thermostats: The Tech Inside
URL: https://eg3.com/embedded/from-microcontrollers-to-smart-thermostats-the-tech-inside-your-hvac/
Description: From Microcontrollers to Smart Thermostats: The Tech Inside Your HVAC. Explore how Cortex-M4 and ESP32 enable PID control in smart HVAC systems over FPGAs.

### I2C vs SPI: Which Serial Bus to Use, and Why
URL: https://eg3.com/embedded/i2c-vs-spi/
Description: I2C uses two shared wires and device addresses; SPI uses four wires and is far faster and full-duplex. Here is which serial bus to pick for sensors, displays, and memory.

### STM32 vs ESP32 vs RP2040: 2026 Decision Tree
URL: https://eg3.com/embedded/stm32vsesp32vsrp2040/
Description: STM32 vs ESP32 vs RP2040: 2026 Decision Tree. Find out which one fits your specific use case.

### What is a Microcontroller: Architecture, Specs, and How to Pick One in 2026
URL: https://eg3.com/embedded/what-is-a-microcontroller/
Description: What is a microcontroller? A chip with CPU, flash, SRAM, and peripherals in one package. Covers Cortex-M tiers, real boards, interfaces, and how to choose.

### EV Charging — Guides & Resources — EG3
URL: https://eg3.com/ev-charging/
Description: EVSE controllers, Level 2 circuit requirements, and what actually happens between your breaker panel and your car battery.

### Digital Filters — FIR, IIR & Filter Design — EG3
URL: https://eg3.com/filters.htm
Description: Digital filter guides. FIR vs IIR trade-offs, Butterworth, Chebyshev, and elliptic design methods, and the filter chains inside consumer audio.

### Microcontroller Resources — EG3
URL: https://eg3.com/gator.htm
Description: Microcontroller guides and resources. ESP32, Arduino, STM32, and the silicon inside your smart devices.

### Guides & Research — EG3
URL: https://eg3.com/guides/
Description: Technical guides on embedded systems, signal processing, smart home technology, security, solar energy, and AI. Independent research.

### Hardware — Guides & Resources — EG3
URL: https://eg3.com/hardware/
Description: Monitors, storage, peripherals, and components. Buying guides, comparisons, and the specs that actually matter.

### Home Networking — Guides & Resources — EG3
URL: https://eg3.com/home-networking/
Description: Mesh WiFi, VLANs, PoE switches, and the structured wiring that separates a house with dead zones from one that streams 4K to every room.

### Cat6 vs Cat6a: When the Upgrade is Worth It
URL: https://eg3.com/home-networking/cat6-vs-cat6a/
Description: Cat6 runs 10 Gbps to about 55 m; Cat6a holds it to the full 100 m at 500 MHz. Here is when the thicker, pricier Cat6a is worth pulling and when Cat6 is plenty.

### PoE vs PoE+ vs PoE++: How Much Power Each Standard Delivers
URL: https://eg3.com/home-networking/poe-vs-poe-plus/
Description: PoE delivers 15.4 W, PoE+ 30 W, and PoE++ up to about 90 W at the switch. Here is what each IEEE standard gives a device and which tier your cameras and access points need.

### What is a VLAN, and When Do You Actually Need One?
URL: https://eg3.com/home-networking/what-is-a-vlan/
Description: What is a VLAN? It splits one switch into separate logical networks with IEEE 802.1Q tags. Here is how tagging, trunk ports, and segmentation actually work, and when you need them.

### How the Inkless Printer Signal Chain Works
URL: https://eg3.com/inkless-printer/
Description: The inkless printer takes Bluetooth data from your phone. The MCU decompresses it and calculates PWM pulses for the thermal head to avoid banding.

### IoT & Connected Devices — Guides & Resources — EG3
URL: https://eg3.com/iot/
Description: Sensor networks, MQTT brokers, LoRaWAN gateways, and the protocols that let a $4 temperature sensor talk to a cloud dashboard 3,000 miles away.

### EG3 Labs — Guides & Resources — EG3
URL: https://eg3.com/labs/
Description: How we built it. Real build logs from production AI systems — data pipelines, document parsers, deployment platforms, and content engines. Built by a non-engineer with AI tools.

### DSP & Communications — Signal Processing Guides — EG3
URL: https://eg3.com/navi/dsp.htm
Description: Digital signal processing guides. DSP fundamentals, audio processing, communication systems, and the signal chains inside consumer technology.

### Privacy Policy — EG3
URL: https://eg3.com/privacy/
Description: How EG3 handles your data. No third-party ad trackers, no retargeting cookies, no data selling. Your privacy choices explained.

### Resources — EG3
URL: https://eg3.com/resources/
Description: Reference cards, curated tools, and developer resources. Prompt engineering formulas, model comparisons, hardware platforms, and the tools we actually use.

### AI Agent Architecture Reference — EG3
URL: https://eg3.com/resources/ai/agent-architecture/
Description: AI Agent Architecture Reference — Free reference card from EG3. Tables, code blocks, copy-paste templates.

### AI Coding Cheatsheet 2026 — EG3
URL: https://eg3.com/resources/ai/ai-coding-cheatsheet/
Description: AI Coding Cheatsheet 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.

### LLM API Integration Reference 2026 — EG3
URL: https://eg3.com/resources/ai/api-integration/
Description: LLM API Integration Reference 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.

### Image & Video Generation Workflows 2026 — EG3
URL: https://eg3.com/resources/ai/image-video-generation/
Description: Image & Video Generation Workflows 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.

### RAG vs Fine-Tuning vs Agents Decision Guide — EG3
URL: https://eg3.com/resources/ai/llm-architecture-decisions/
Description: RAG vs Fine-Tuning vs Agents Decision Guide — Free reference card from EG3. Tables, code blocks, copy-paste templates.

### Claude vs Grok vs GPT-5.4 Comparison — EG3
URL: https://eg3.com/resources/ai/model-comparison/
Description: Claude vs GPT vs Gemini vs Grok Comparison — Free reference card from EG3. Tables, code blocks, copy-paste templates.

### OpenRouter Quick Start & Review — EG3
URL: https://eg3.com/resources/ai/openrouter-guide/
Description: OpenRouter Quick Start & Review — Free reference card from EG3. Tables, code blocks, copy-paste templates.

### Persistent Agents & Always-On AI — EG3
URL: https://eg3.com/resources/ai/persistent-agents/
Description: Persistent Agents & Always-On AI — Free reference card from EG3. Tables, code blocks, copy-paste templates.

### Prompt Engineering Formulas 2026 — EG3
URL: https://eg3.com/resources/ai/prompt-engineering/
Description: Prompt Engineering Formulas 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.

### System Prompt Templates 2026 — EG3
URL: https://eg3.com/resources/ai/system-prompts/
Description: System Prompt Templates 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.

### David Olson, Technical Reviewer | EG3
URL: https://eg3.com/reviewer/david-olson/
Description: Founder of TheFatBook.com and PermitCalculator.com. Software developer and ML practitioner. Reviews EG3 articles for technical accuracy, data integrity, and engineering claims. David Olson reviews all guides on EG3 for technical accuracy.

### RTOS — Guides & Resources — EG3
URL: https://eg3.com/rtos/
Description: Real-time operating systems for embedded and safety-critical applications. Certification, scheduling, OTA architecture, and the kernels powering medical, automotive, and aerospace systems.

### Best RTOS 2026: Certification and OTA Architecture
URL: https://eg3.com/rtos/best-rtos-2026/
Description: The best RTOS 2026 selection hinges on certification evidence and OTA architecture for 10-15 year DSP success in security cameras and solar inverters.

### FreeRTOS Complete Guide: Kernel, Licensing, Architecture Support
URL: https://eg3.com/rtos/freertos-complete-guide-kernel-licensing-architecture-support/

### Priority Inversion: The Bug That Froze Mars Pathfinder
URL: https://eg3.com/rtos/priority-inversion-the-bug-that-froze-mars-pathfinder/

### QNX OS: BlackBerry's Microkernel in 275M+ Vehicles
URL: https://eg3.com/rtos/qnx-os-blackberrys-microkernel-in-275m-vehicles/

### Rate Monotonic Scheduling: Liu & Layland's 1973 Classic
URL: https://eg3.com/rtos/rate-monotonic-scheduling-liu-laylands-1973-classic/

### Real-Time Operating Systems — RTOS Guide — EG3
URL: https://eg3.com/rtos/rtos-free.htm
Description: RTOS fundamentals for embedded systems. FreeRTOS, Zephyr, and why your doorbell camera never drops a frame.

### RTOS vs Linux: When to Use Each (with Benchmarks)
URL: https://eg3.com/rtos/rtos-vs-linux-when-to-use-each-with-benchmarks/

### What is an RTOS? Real-Time Operating Systems Explained
URL: https://eg3.com/rtos/what-is-an-rtos-real-time-operating-systems-explained/

### Zephyr Project: The Linux Foundation's Vendor-Neutral RTOS
URL: https://eg3.com/rtos/zephyr-project-the-linux-foundations-vendor-neutral-rtos/

### Security Cameras — Guides & Resources — EG3
URL: https://eg3.com/security-cameras/
Description: PoE cameras, NVR storage, doorbell cameras, and the signal chains that make 24/7 recording possible on a $3 chip.

### Best Doorbell Camera 2026: Engineering Behind the Top Picks
URL: https://eg3.com/security-cameras/best-doorbell-camera-2026-engineering-behind-the-top-picks/
Description: Best Doorbell Camera 2026: Engineering Behind the Top Picks explores H.265 bandwidth savings and local processing in Ring, Eufy and Nest for stable 4K video.

### NVR Security Systems Explained: PoE Cameras, Storage, and Se
URL: https://eg3.com/security-cameras/nvr-security-systems-explained-poe-cameras-storage-and-setup/
Description: NVR Security Systems Explained: PoE Cameras, Storage, and Setup. Explore PoE power (802.3af/at/bt), storage needs, and local setup without subscriptions.

### PoE Security Cameras: Why Power Over Ethernet Changes Everyt
URL: https://eg3.com/security-cameras/poe-security-cameras-why-power-over-ethernet-changes-everything/
Description: PoE Security Cameras: Why Power Over Ethernet Changes Everything. It removes the need for separate power outlets and cuts installation complexity.

### Security Camera Local Storage: No Cloud, No Subscription, No
URL: https://eg3.com/security-cameras/security-camera-local-storage-no-cloud-no-subscription-no-problem/
Description: Security Camera Local Storage: No Cloud, No Subscription, No Problem. Keep recording during internet outages with local NVR storage, no subscriptions needed.

### Smart Home — Guides & Resources — EG3
URL: https://eg3.com/smart-home/
Description: Smart thermostats, Zigbee mesh networks, Matter controllers, IoT sensor networks, and why your $250 Ecobee outperforms the $25 generic running the same PID loop.

### Matter vs Zigbee vs Z-Wave: Which Smart Home Mesh Actually Fits Your House
URL: https://eg3.com/smart-home/matter-vs-zigbee-vs-z-wave/
Description: Matter, Zigbee, and Z-Wave solve the same mesh problem with different frequency bets. Which one fits depends on your walls and your gear, not a winner.

### 2026 Raspberry Pi Home Automation: A Practical Setup Guide
URL: https://eg3.com/smart-home/raspberry-pi-home-automation-a-practical-setup-guide/
Description: Raspberry Pi Home Automation: A Practical Setup Guide. Pi 5 with Home Assistant OS beats Pi 4 for speed, I/O and reliability in 24/7 homes with 50+ devices.

### Assembly Language Resources — EG3
URL: https://eg3.com/softd/assembly.htm
Description: 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
URL: https://eg3.com/softd/cplus.htm
Description: C++ programming resources for embedded systems and firmware development. ESP32, FreeRTOS, and the language that still runs every smart device.

### Object-Oriented Programming Resources — EG3
URL: https://eg3.com/softd/object.htm
Description: Object-oriented programming resources for embedded and systems development. C++, design patterns, and the OO fundamentals that survived three decades of fashion cycles.

### Compiler Resources — EG3
URL: https://eg3.com/softdv/compiler.htm
Description: Compiler tools and resources for embedded development. GCC, LLVM, cross-compilation toolchains, and the infrastructure behind your firmware builds.

### Software — Guides & Resources — EG3
URL: https://eg3.com/software/
Description: Software testing, DevOps, app development, and the tools that ship code. From unit tests to deployment pipelines.

### Best Coding Podcasts in 2026
URL: https://eg3.com/software/best-coding-podcasts/
Description: Best coding podcasts rank sixth among developer resources in 2026. Docs at 67.8%, search 58.7%, Stack Overflow 51.4%, video 50%, AI codegen tools next. Shows

### Solar & Energy — Guides & Resources — EG3
URL: https://eg3.com/solar/
Description: Solar inverters, MPPT algorithms, panel-level optimization, and the 20-50 kHz switching that turns DC into grid-synced AC.

### Resources — EG3
URL: https://eg3.com/srcnet.htm
Description: Reference cards, curated tools, and developer resources. Prompt engineering formulas, model comparisons, hardware platforms, and the tools we actually use.

### Terms of Use — EG3
URL: https://eg3.com/terms/
Description: Terms of use for EG3 technical guides, reference cards, and AI chat assistant. Content is educational, not professional advice.

### Tools & Calculators — Guides & Resources — EG3
URL: https://eg3.com/tools/
Description: Online tools, converters, calculators, and utilities. Convert files, check systems, and solve problems without installing anything.