Practical Uses for a Raspberry Pi: From Ad-Blocking to AI-Powered Business Automation

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There’s a credit-card-sized computer sitting on my desk right now — sandwiched between a coffee mug and a stack of astronomy books — running three separate automation pipelines, serving a custom API, blocking ads for my entire household, and costing me roughly seven dollars a year in electricity. That computer is a Raspberry Pi 5. And if you’re still paying a cloud VPS provider $10 a month for stuff you could run locally, I need you to read this.

Raspberry Pi projects have hit 68 million units sold worldwide, and the community shows zero signs of slowing down. But here’s the twist most people don’t know: 70 percent of Pis now go to industrial and embedded applications — factory floors, point-of-sale systems, digital signage, scientific instruments. The hobbyist use case is almost the minority now. Which means the software ecosystem is mature, the documentation is excellent, and the hardware gets better every generation. The Pi 5, released in late 2023, is genuinely fast — we’re talking quad-core Arm Cortex-A76 at 2.4GHz, up to 8GB RAM, and a PCIe 2.0 interface that opens up NVMe storage. For a home server or automation hub, it’s almost overkill.

What I Actually Run on My Pi (And Why It Changed How I Work)

Let me be specific, because vague tech enthusiasm helps nobody. My Pi 5 — the 8GB model, running Raspberry Pi OS Lite — handles three things I used to either pay for or do manually.

First: automated astrology report generation. My site 4phases.com publishes weekly cosmic forecasts, and I used to write every word of those by hand. Now a Python script runs every Sunday at 3 AM, pulls planetary position data from a local ephemeris library, formats it against a template system I built, and drops draft posts directly into WordPress via the REST API. I review and edit — but the skeleton is built while I sleep. The Pi never misses its alarm.

Second: a stock analysis API server. Nothing fancy — a Flask app that runs a handful of technical indicators against ticker data I pull from a free API, caches results locally, and serves them to a dashboard on my laptop. I looked at running this on AWS Lambda. The math got embarrassing fast. My Pi does it for free after the hardware cost.

Third: n8n workflow automation — more on that below. The point is: one small computer, always on, always running, and my annual electricity bill for it is under ten dollars. That’s not a rounding error. That’s a structural advantage.

Raspberry Pi 5 in 2026: Models, Pricing, and the Memory Shortage You Need to Know About

Here’s the current state of Pi 5 pricing, because it’s gotten complicated. The Pi 5 launched at $60 for 4GB and $80 for 8GB — those were the official prices. Then 2026 happened. A global LPDDR4X memory shortage — the same kind of supply chain drama that made graphics cards cost a kidney in 2021 — has pushed prices up across the board. As of early 2026, expect to pay $10–20 above MSRP on Amazon for the most popular configurations. The 8GB model, which I’d recommend for any server use case, is running around $90–100 street price right now. Annoying, but not deal-breaking when you consider what you’d spend on cloud infrastructure over 18 months.

The Pi 5 lineup as it stands:

• Raspberry Pi 5 (4GB) — The entry point. Fine for Pi-hole, Home Assistant, basic automation. Gets crowded fast if you try to run multiple services simultaneously.
• Raspberry Pi 5 (8GB) — The sweet spot. Run everything I described above plus a few more services without breaking a sweat. This is what I use.
• Raspberry Pi 5 with AI HAT+ 2 — The new hotness. A dedicated neural processing unit add-on that pushes edge AI inference to 26 TOPS (tera-operations per second). More on this in the projects section.
• Official Raspberry Pi 5 Starter Kits — Bundles that include the Pi, official case, power supply, and sometimes a microSD card. If you’re starting from zero, these save you the headache of compatibility hunting.

You’ll also need a few accessories: a quality USB-C power supply (the official 27W one is worth it — cheap power supplies cause mysterious crashes), a fast microSD card or an NVMe SSD via the PCIe HAT, and a case with active cooling if you’re running it 24/7 under load. The Pi 5 runs warmer than its predecessors. Don’t skip the fan.

Pi vs. Cloud VPS: The Cost Math Nobody Does Until It’s Too Late

Let’s do the math, because this is where the Pi argument gets genuinely compelling and most tech writers wave their hands instead of showing their work.

A basic cloud VPS — something like a DigitalOcean Droplet, Linode Nanode, or AWS Lightsail instance with 2GB RAM — runs $6–12 per month. Call it $96 per year on the low end, $144 per year if you need more resources. That’s for a single virtual machine running a single Linux instance.

A Raspberry Pi 5 (8GB) costs roughly $90–100 at current 2026 prices. Add an official power supply ($12), a quality case with fan ($15), and a 128GB microSD card ($12). You’re at about $130–140 all-in for hardware. The electricity cost for a Pi 5 running 24/7 at moderate load is roughly 5–9 dollars per year — I’ve measured mine at about 7 watts average draw, which works out to about $7.50 annually at average US electricity rates.

Break-even against a $10/month VPS: 12–15 months. Break-even against a $8/month VPS: 15–18 months. After that, you’re running for the cost of a couple of coffees per year. Forever.

And the Pi can run multiple services simultaneously — Pi-hole plus Home Assistant plus your automation server plus a VPN endpoint — which would require either a beefier VPS tier or multiple instances in the cloud. The cost advantage compounds fast.

The cloud wins on uptime guarantees, managed backups, and accessibility from anywhere without port-forwarding. The Pi wins on cost, privacy, and the fact that your data never leaves your house. For low-traffic, always-on automation work — which is exactly the use case I’m describing — the Pi is almost always the right call.

The Privacy Advantage Nobody Talks About Enough

Here’s something I care about deeply and most cost comparisons ignore entirely: when your automation runs on a cloud VPS, your data lives on someone else’s computer. Your workflow triggers, your API calls, your home network traffic patterns, your business logic — all of it passes through infrastructure you don’t control, logged by people whose incentives don’t perfectly align with yours.

When it runs on a Pi in your home, it stays in your home. Your Pi-hole DNS queries never leave your router. Your Home Assistant automations — including when you arm your security system, when you wake up, when you leave for work — are stored locally. Your n8n workflows, which might contain API keys, business data, or personal information, run on hardware you physically own.

This isn’t tinfoil-hat territory. It’s basic data hygiene. The Electronic Frontier Foundation has been making this argument for years: self-hosted infrastructure is a meaningful privacy tool, not just a cost-saving measure. For the kind of business automation I run — including client astrological data and financial analysis — keeping that data local isn’t optional. It’s a requirement.

15 Practical Raspberry Pi Projects Worth Your Time

Here’s where we get practical. These aren’t theoretical — every project on this list has a thriving community, solid documentation, and runs well on a Pi 5. I’ve starred the ones I run personally.

1. Pi-hole: Block Ads for Your Entire Network ⭐

Pi-hole is the gateway drug of Raspberry Pi projects — the one that convinces skeptics that this little computer is worth the investment. It’s a DNS sinkhole: it sits between your router and the internet, intercepts DNS queries for known ad and tracking domains, and returns nothing. Every device on your network — phones, tablets, smart TVs, laptops — gets ad-blocking without installing anything on them individually.

Setup takes about 20 minutes. The web dashboard shows you exactly how much of your network traffic is ads and trackers (spoiler: it’s depressing — usually 15–30%). It runs on a Pi Zero 2 W if you want to dedicate a tiny computer to just this task, or it shares a Pi 5 happily alongside other services. This is the first thing I set up on any new Pi.

2. Home Assistant: Your Smart Home’s Brain ⭐

Home Assistant is the most impressive open-source project I’ve used in the last five years. It’s a home automation platform that integrates with over 3,000 different devices and services — Philips Hue, Ring cameras, Nest thermostats, IKEA smart bulbs, your garage door opener, your washing machine, your car. It runs locally, it doesn’t require a subscription, and it gives you automation capabilities that make commercial smart home platforms look like toys.

The Pi 5 (8GB) handles Home Assistant with room to spare. The dedicated Home Assistant OS image makes installation almost foolproof. If you have any smart home devices at all, this is worth your time.

3. Kodi: Media Center That Actually Works

Hook a Pi 5 to your TV via micro-HDMI, install LibreELEC (a minimal OS built around Kodi), and you have a 4K media center that plays virtually any file format, streams from your NAS, integrates with streaming services via add-ons, and costs a fraction of an Apple TV or Nvidia Shield. The Pi 5’s H.265 hardware decoding handles 4K content smoothly. For a secondary TV or a bedroom setup, this is hard to beat.

4. Network-Attached Storage (NAS)

Connect a USB hard drive or SSD to a Pi, install OpenMediaVault, and you have a NAS — a centralized file server accessible from every device on your network. Not as fast as a dedicated Synology or QNAP device, but dramatically cheaper. Great for backups, media storage, and shared documents. The Pi 5’s USB 3.0 ports deliver real-world transfer speeds of 200–300 MB/s to a fast USB SSD, which is plenty for home use.

5. WireGuard VPN Server ⭐

A Pi running WireGuard as a VPN server lets you tunnel back into your home network from anywhere in the world — securely, privately, without paying a VPN subscription service. When I’m on public Wi-Fi, I’m connected to my Pi at home. My DNS queries go through Pi-hole. My traffic routes through my home IP. PiVPN makes the WireGuard setup surprisingly painless — it’s basically a one-command installer.

6. RetroPie: Every Retro Game Ever Made

RetroPie turns a Pi into an emulation station that handles everything from Atari 2600 to PlayStation 1 to Nintendo 64. The Pi 5 is powerful enough to handle N64 and early PS1 games without the performance hiccups that plagued older Pi models. Connect a pair of USB controllers, install RetroPie, and you have an arcade cabinet in a box. This is legitimately one of the most fun weekend projects you can do with a Pi.

7. Security Camera System with Motion Detection

Combine a Pi with MotionEye OS and a handful of cheap IP cameras, and you have a local security camera system that records to your own storage, never uploads footage to a cloud service, and costs nothing in subscription fees. Unlike Ring or Nest cameras, nobody else has access to your footage. The Pi 5 can handle multiple camera streams simultaneously with motion detection enabled.

8. Automation Server with Cron and Python ⭐

This is the use case I described at the top — running scheduled scripts that do useful work while you sleep. Weekly report generation, data scraping and processing, automated backups, email digests, social media scheduling. A Pi running cron jobs and Python scripts is a remarkably capable automation engine. It’s not as visual as n8n, but it’s infinitely flexible. If you can write Python, you can automate almost anything.

9. Self-Hosted API Server ⭐

Flask or FastAPI on a Pi makes a surprisingly capable local API server. I run my stock analysis API this way — a lightweight Python app that handles a few requests per minute, caches results, and serves my personal dashboard. For low-traffic internal APIs, the Pi is more than adequate. You can expose it to the internet via port forwarding or a reverse proxy like Caddy, though for anything public-facing, think carefully about security hardening first.

10. n8n Workflow Automation ⭐

n8n is what Zapier wishes it could be — a self-hosted workflow automation platform with a visual node editor, 400+ integrations, and no per-task pricing. Connect your email to your CRM. Auto-post content to social media. Trigger Slack notifications when a form is submitted. Sync data between apps that don’t natively talk to each other. Running n8n on a Pi instead of paying for n8n Cloud saves you $20/month minimum. On the Pi 5 (8GB), it runs smoothly alongside other services.

11. Print Server

Got an old USB printer that doesn’t have Wi-Fi? CUPS (Common Unix Printing System) on a Pi turns any USB printer into a network printer accessible from every device in your house. Takes about 30 minutes to set up. Suddenly that perfectly functional laser printer you were about to replace works wirelessly. This is one of those projects that seems small until it saves you $200 on a new printer.

12. Digital Signage

Remember that statistic about 70 percent of Pis going to industrial use? Digital signage is a huge chunk of that. A Pi connected to a display showing dashboards, menus, announcements, or rotating content is a standard commercial deployment. For home use: a Pi displaying a Grafana dashboard of your home automation data, or a family calendar, or a weather station display. Screenly OSE is a popular open-source digital signage platform built specifically for Pi.

13. Edge AI with the Raspberry Pi AI HAT+ 2

This is the newest and most exciting project category. The Raspberry Pi AI HAT+ 2 is an add-on board featuring the Hailo-8L neural processing chip, delivering 26 TOPS of AI inference performance. That’s enough to run real-time object detection, image classification, and lightweight language model inference locally — no cloud API required, no per-token costs, no latency from a round-trip to a server.

Practical applications: a security camera that identifies specific people or vehicles locally. A voice assistant that processes speech on-device. A plant disease detector in a greenhouse. A manufacturing quality control system. The AI HAT+ 2 connects via the Pi 5’s PCIe interface and runs inference tasks without loading the main CPU. For anyone interested in running AI workloads privately and cheaply, this is genuinely exciting hardware.

You can find the — expect to pay around $70 for the HAT itself, plus your Pi 5 base.

14. Code-Server: VS Code in Your Browser

Code-server runs Visual Studio Code as a web application on your Pi, accessible from any browser on your network (or remotely via your VPN). This means you can do real development work from a tablet, a Chromebook, or any computer that doesn’t have your dev environment set up. Your code lives on the Pi, your terminal is on the Pi, your Git history is on the Pi. It’s a personal cloud development environment that costs nothing after hardware.

15. Uptime Monitor and Status Dashboard

Uptime Kuma is a self-hosted monitoring tool that pings your websites, APIs, and services at regular intervals and alerts you when something goes down. Running it on a Pi means your monitor is independent of the infrastructure it’s monitoring — if your web host has an outage, your Pi still knows about it and can alert you via Telegram, email, or Slack. It’s a beautiful dashboard, it’s free, and it takes about 15 minutes to set up with Docker.

Where to Start If You’ve Never Done This Before

The learning curve is real, but it’s not as steep as it used to be. Here’s the honest beginner path.

Week 1: Get the hardware running. Buy a Pi 5 (4GB is fine to start), an official power supply, a case with a fan, and a quality 64GB microSD card. Use the Raspberry Pi Imager software to flash Raspberry Pi OS to the card. Boot it up. Spend a few hours just getting comfortable with the Linux terminal — learn cd, ls, sudo apt update, and how SSH works. That’s your foundation.

Week 2: Install Pi-hole. Follow the official documentation at pi-hole.net. It’s a single curl command and a few menu prompts. Point your router’s DNS to your Pi’s IP address. Watch in awe as your ad-blocking dashboard fills up. This is your first win — it’s tangible, it’s useful, and it teaches you the basics of running a service on Linux.

Week 3–4: Add Home Assistant or n8n. Once Pi-hole is running and stable, add a second service. Home Assistant has excellent documentation and a large community. n8n has a one-command Docker install. Either one will teach you about Docker, port forwarding, and managing multiple services — the skills that unlock everything else on this list.

Month 2 and beyond: You’ll know what you want by then. The community at r/homelab and r/raspberry_pi is genuinely helpful — ask questions, search for tutorials, and don’t be afraid to wipe your microSD and start over. That’s not failure. That’s how you learn faster.

What the Pi Doesn’t Do Well (Be Honest With Yourself)

Fair warning: the Pi isn’t the right tool for everything, and pretending otherwise wastes your time.

High-traffic web serving. If your website gets more than a few thousand visitors per day, a Pi will struggle. The network interface, storage I/O, and RAM constraints make it a poor choice for anything that needs to scale. Use a VPS for public-facing web apps with real traffic.

Anything requiring 99.9% uptime guarantees. Your Pi can crash. Your power can go out. Your microSD card can corrupt. For business-critical infrastructure, the cloud’s redundancy and managed backups are worth the money. My Pi handles my automation pipelines, but my actual websites live on a VPS with automated backups. Belt and suspenders.

Large language model inference without the AI HAT+. Running a full LLM on a Pi without dedicated neural processing hardware is painful — slow and memory-constrained. With the AI HAT+ 2, lightweight models become feasible. Without it, stick to API calls to hosted models for anything language-model-related.

Video transcoding at scale. Jellyfin or Plex can run on a Pi, but if you need to transcode high-bitrate 4K content on the fly for multiple simultaneous streams, the Pi will choke. Direct play works great. Transcoding is where you hit the ceiling.

The Sweet Spot: Private, Low-Traffic, Always-On Automation

Here’s where I land after two years of running a Pi as my primary automation server: the Pi absolutely excels at private, low-traffic, always-on workloads. Scheduled jobs. Internal APIs. Home automation. Network services like DNS and VPN. Workflow automation with n8n. Development tools like code-server. Monitoring dashboards.

These are things that run in the background, don’t need to scale, benefit from local execution for privacy reasons, and don’t justify paying $10–15 a month to a cloud provider. The Pi handles all of them simultaneously, sips power, and asks for nothing in return except occasional OS updates.

My astrology forecast pipeline runs every Sunday at 3 AM and finishes in about four minutes. My stock analysis API handles maybe 50 requests per day from my personal dashboard. My Pi-hole blocks about 18,000 ad and tracking requests per day across my household devices. My WireGuard VPN endpoint lets me tunnel home from anywhere. All of this runs on one $90 computer consuming 7 watts.

The industrial and embedded world figured this out years ago — that’s why 70 percent of Pi sales now go to commercial applications. The rest of us are catching up.

Recommended Hardware to Get Started

Here’s exactly what I’d buy today, given current 2026 prices and availability.

• — The starting point. Handles Pi-hole, Home Assistant, VPN, and light automation without issues.
• — What I use. Run everything above plus n8n, code-server, and multiple APIs simultaneously.
• — For edge AI projects. Adds 26 TOPS of neural processing via PCIe. Required if you want to run local AI inference seriously.
• — Don’t skip the cooling on a 24/7 server. The active cooler keeps temperatures sane under sustained load.
• — Cheap power supplies cause random crashes and data corruption. Buy the official one. Non-negotiable.

The Bottom Line: Seven Dollars a Year Is Hard to Argue With

I’ve been running some version of a Raspberry Pi server since the Pi 2 days. Every generation gets meaningfully better — faster CPU, more RAM, better I/O. The Pi 5 is the first one where I genuinely don’t feel like I’m compromising. It’s fast enough for everything I ask of it, small enough to sit forgotten on a shelf, and cheap enough to run that I’ve stopped thinking about its electricity cost entirely.

The memory shortage has made 2026 a slightly annoying time to buy — prices are up $10–20 from where they were at launch, and availability fluctuates. But even at $100 for the 8GB model, the math works. You’ll break even against a mid-tier VPS in about 14 months, and after that you’re running a capable Linux server for the cost of a small bag of coffee per year.

Start with Pi-hole. Seriously — just start there. It’s the fastest path from “I bought this thing” to “this thing is actively improving my daily life.” Once you see 18,000 blocked requests in your dashboard and realize that’s just a normal Tuesday, you’ll start thinking about what else you want to run on it. That’s when the real fun starts.

Sixty-eight million units sold. Seventy percent going to industrial use. And one sitting on my desk, quietly running my business automation, blocking my ads, and routing my VPN traffic — for seven dollars a year. Some things are just worth doing.

Further Reading

If this got you excited about self-hosted infrastructure and small-form-factor computing, these books are worth adding to your shelf:

Raspberry Pi Cookbook

Buy Now

Raspberry Pi Cookbook: Software and Hardware Problems and Solutions by Simon Monk — The closest thing to a comprehensive Pi reference book, covering hundreds of projects from basic GPIO to networking to machine learning. Now in its 4th edition, it’s the phone book of Pi projects — you don’t read it cover to cover, but it’s indispensable when you need it.

The Linux Command Line

Buy Now

The Linux Command Line: A Complete Introduction by William Shotts — If the terminal still intimidates you, this is the book that fixes that. Shotts writes clearly and practically, and the command-line skills you build here transfer directly to managing a Pi server. The newly released 3rd edition is fully updated for modern Linux.

20 Easy Raspberry Pi Projects

Buy Now

20 Easy Raspberry Pi Projects: Toys, Tools, Gadgets, and More! by Rui Santos and Sara Santos — A project-based guide packed with practical builds — from weather stations to game consoles to home automation controllers. Each project is self-contained with clear instructions, making it perfect for beginners who learn best by building.