Every guide starts with primary technical sources. Datasheets, reference designs, IEEE papers, manufacturer documentation. Not blog posts, not press releases, not marketing collateral. Field observations from TruSentry installations supplement the specs. When the spec sheet doesn’t cover something, we check it in the field. When we can’t verify a claim either way, we flag it.
All guides by Josh Ausmus.
Best Coding Podcasts in 2026
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
From Microcontrollers to Smart Thermostats: The Tech Inside
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.
STM32 vs ESP32 vs RP2040: 2026 Decision Tree
STM32 vs ESP32 vs RP2040: 2026 Decision Tree. Find out which one fits your specific use case.
OBD2 Codes Explained: How AI Diagnostics Are Changing DIY Car Repair
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.
LLM API Integration Best Practices 2026 Guide
LLM API Integration Reference 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
What is a Microcontroller: Architecture, Specs, and How to Pick One in 2026
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.
Matter vs Zigbee vs Z-Wave: Which Smart Home Mesh Actually Fits Your House
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.
System Prompt Templates That Actually Work 2026
System Prompt Templates 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
AI Agent Architecture Reference: True Costs
AI Agent Architecture Reference — Free reference card from EG3. Tables, code blocks, copy-paste templates.
Soldering Iron Buyer’s Guide 2026: From $25 Pinecil to $$$ JBC
Soldering Iron Buyer’s Guide 2026: From $25 Pinecil to $$$ JBC. Find out which iron is the right one for your needs and budget
Fine-Tuning vs RAG vs Agents Decision Guide 2026
RAG vs Fine-Tuning vs Agents Decision Guide — Free reference card from EG3. Tables, code blocks, copy-paste templates.
AI Coding Cheatsheet 2026: Local Edge AI Costs
AI Coding Cheatsheet 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
The Engineering Behind Solar Inverters: How Signal Processin
The Engineering Behind Solar Inverters: How Signal Processing Maximizes Output. Signal processing uses MPPT to maximize solar output and ensure grid sync.
Digital Filter Design: Balancing Performance and Constraints
Digital filter design balances stopband attenuation, phase response, load and stability against hardware constraints. The DSP signal chain maps to FIR, IIR and
FPGA vs Microcontroller: Which Runs Your Smart Home Hub
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.
Persistent Agents and Always-On AI Systems: Hardware Risks
Persistent Agents & Always-On AI — Free reference card from EG3. Tables, code blocks, copy-paste templates.
How the Inkless Printer Signal Chain Works
The inkless printer takes Bluetooth data from your phone. The MCU decompresses it and calculates PWM pulses for the thermal head to avoid banding.
PoE Security Cameras: Why Power Over Ethernet Changes Everyt
PoE Security Cameras: Why Power Over Ethernet Changes Everything. It removes the need for separate power outlets and cuts installation complexity.
Image & Video Generation Workflows + Prompts 2026: Stats
Image & Video Generation Workflows 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
Claude vs Grok vs GPT-5.4 Model Comparison 2026
Claude vs GPT vs Gemini vs Grok Comparison — Free reference card from EG3. Tables, code blocks, copy-paste templates.
AI Chatbot Development Services Cost $5K-$200K
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.
Modern Prompt Engineering Reference & Formulas 2026
Prompt Engineering Formulas 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.
How DSP Powers Every Smart Home Device You Own
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.
NVR Security Systems Explained: PoE Cameras, Storage, and Se
NVR Security Systems Explained: PoE Cameras, Storage, and Setup. Explore PoE power (802.3af/at/bt), storage needs, and local setup without subscriptions.
2026 Raspberry Pi Home Automation: A Practical Setup Guide
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.
What is a VLAN, and When Do You Actually Need One?
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.
PoE vs PoE+ vs PoE++: How Much Power Each Standard Delivers
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.
Cat6 vs Cat6a: When the Upgrade is Worth It
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.
I2C vs SPI: Which Serial Bus to Use, and Why
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.