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Josh Ausmus

Founder, TruSentry Security | Technology Editor, EG3

Josh Ausmus is the editorial voice of EG3 and the founder of TruSentry, a security camera and smart home installation company. He bridges the gap between embedded systems engineering and consumer technology from both sides of the equation. He reads the datasheets, reference designs, and FCC filings that manufacturers publish. Then he installs the actual hardware in real homes through TruSentry and finds out what the spec sheet didn’t mention. That combination of research and field experience is what makes EG3 different from publications that only review products on a test bench. When Josh writes about a camera’s night vision performance or an NVR’s storage architecture, it’s informed by real-world installation work, not just lab testing.

Methodology

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.

Published Guides

All guides by Josh Ausmus.

What is a Microcontroller: Architecture, Specs, and How to Pick One in 2026
Embedded Systems

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.

Apr 29, 2026 · ✓ Updated Apr 29, 20269 min readRead →
AI & Computing

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.

Apr 3, 2026 · ✓ Updated Apr 3, 20263 min readRead →
PoE Security Cameras: Why Power Over Ethernet Changes Everyt
Home Networking

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.

Apr 3, 2026 · ✓ Updated Apr 3, 20269 min readRead →
Technology

Image & Video Generation Workflows + Prompts 2026: Stats

Image & Video Generation Workflows 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.

Apr 3, 2026 · ✓ Updated Apr 3, 20265 min readRead →
AI & Computing

Modern Prompt Engineering Reference & Formulas 2026

Prompt Engineering Formulas 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.

Apr 3, 2026 · ✓ Updated Apr 3, 20264 min readRead →
2026 Raspberry Pi Home Automation: A Practical Setup Guide
Smart Home

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.

Apr 9, 2026 · ✓ Updated Apr 9, 20268 min readRead →
Digital Filter Design: Balancing Performance and Constraints
DSP & Signal Processing

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

Apr 7, 2026 · ✓ Updated Apr 7, 20269 min readRead →
AI & Computing

LLM API Integration Best Practices 2026 Guide

LLM API Integration Reference 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.

Apr 3, 2026 · ✓ Updated Apr 3, 20263 min readRead →
How DSP Powers Every Smart Home Device You Own
DSP & Signal Processing

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.

Apr 1, 2026 · ✓ Updated Apr 1, 20268 min readRead →
How the Inkless Printer Signal Chain Works
Hardware

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.

7 min readRead →
AI & Computing

System Prompt Templates That Actually Work 2026

System Prompt Templates 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.

Apr 3, 2026 · ✓ Updated Apr 3, 20266 min readRead →
AI & Computing

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.

Apr 3, 2026 · ✓ Updated Apr 3, 20264 min readRead →
AI & Computing

AI Coding Cheatsheet 2026: Local Edge AI Costs

AI Coding Cheatsheet 2026 — Free reference card from EG3. Tables, code blocks, copy-paste templates.

Apr 3, 2026 · ✓ Updated Apr 3, 20265 min readRead →
Best Coding Podcasts in 2026
Software

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

16 min readRead →
AI Chatbot Development Services Cost $5K-$200K
AI & Computing

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.

7 min readRead →
NVR Security Systems Explained: PoE Cameras, Storage, and Se
Security Cameras

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.

Mar 29, 2026 · ✓ Updated Mar 29, 20268 min readRead →
From Microcontrollers to Smart Thermostats: The Tech Inside
Embedded Systems

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.

Mar 27, 2026 · ✓ Updated Mar 27, 20267 min readRead →
The Engineering Behind Solar Inverters: How Signal Processin
Solar & Energy

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.

Mar 25, 2026 · ✓ Updated Mar 25, 20268 min readRead →
FPGA vs Microcontroller: Which Runs Your Smart Home Hub
Embedded Systems

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.

Mar 22, 2026 · ✓ Updated Mar 22, 20266 min readRead →
AI & Computing

AI Agent Architecture Reference: True Costs

AI Agent Architecture Reference — Free reference card from EG3. Tables, code blocks, copy-paste templates.

Apr 3, 2026 · ✓ Updated Apr 3, 20263 min readRead →
AI & Computing

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.

Apr 3, 2026 · ✓ Updated Apr 3, 20264 min readRead →