What Can We Do with Raspberry Pi 3?

The room smelled faintly of melted acrylic and machine oil—just another Tuesday at our workshop. I had a dozen Pi 4s prepped for testing, but one of our interns reached for a Pi 3 instead. “Isn’t this one kind of outdated?” he asked, holding it like a relic. I almost laughed. Outdated? Maybe on paper. But this little board still powers half the demos at our trade shows, from smart kiosks to retro gaming rigs. So I told him, “Let’s plug it in—and I’ll show you why it still earns its spot.

I’m often asked why I still spec the Raspberry Pi 3 for client demos in 2025. The answer is simple:

The Pi 3 hits a sweet spot: power‑efficient, Wi‑Fi ready, and surrounded by an ecosystem big enough to drown in. Let me show you where it shines.

Retro Gaming & Emulation

Build a DIY NES/SNES Classic Mini with RetroPie

I flashed RetroPie on a lunch break, loaded a legal copy of Super Mario World, and slapped the board into a clear MaidaTech case. Customers love seeing their logo glowing through the acrylic while Yoshi jumps.

Multi‑console arcade cabinet

Arcade builders in Belgium ask for one Pi 3 per joystick. MAME, Sega, even early PlayStation titles run smooth at 60 FPS when you keep the airflow clean.

Game streaming & cloud play

Steam Link on a Pi 3 surprised me. I streamed Elden Ring from my office PC to a cheap hotel TV during CES—latency stayed under 40 ms on 5 GHz Wi‑Fi.

Critical Angle: Emulation is legal if you own the original ROMs. Always remind buyers; nobody likes a takedown notice.

Button mashing is fun, but watching movies with the same box feels like magic—so let’s pivot to the couch.

Home Media Center

Kodi / OSMC media hub setup

With LibreELEC, my Pi 3 boots into Kodi in under 15 seconds. CEC lets any TV remote act like it was born for the job.

Streaming services on Pi 3

Netflix needs a Widevine plugin. It’s one command, yet half my clients still email me at 2 a.m. I send them a screenshot and a smiley face.

Whole‑home audio endpoints

Snapcast turns leftover Pi 3 boards into speakers for the factory break room. Sync drift? Under 20 µs—nobody claps off‑beat.

A Pi 3 pumping playlists is cool, but blocking ads for the whole office is cooler—read on.

Network Services & Privacy

Network‑wide ad‑blocking with Pi‑hole

I once measured a 21 % speed‑up on our slowest line just by killing ad scripts.

Personal VPN / WireGuard server

A single Pi 3 now protects my Shenzhen‑to‑Brussels coffee‑shop sessions. AES speeds hover around 50 Mbps—enough for Zoom without stutters.

Lightweight web, Git, or file server

When Davide’s Amazon listings broke staging, a Pi 3 mirrored the repo and saved his launch day.

Flip Side: More services mean more attack vectors. Harden SSH, change default creds, sleep soundly.

Security sets the base; automation adds the sparkle. Let’s wire up some lights.

Smart Home & Automation

Home Assistant hub & DIY Alexa skills

I taught my office lights to fade when the laser cutter starts. It feels like living in a sci‑fi short film.

Smart doorbell / CCTV camera node

A Pi Camera v2 plus MotionEyeOS let me peek at incoming pallets, even when customs shows up unannounced.

Environmental monitoring & alerts

DHT22 sensors ping me on Telegram if humidity crosses 70 %. Acrylic hates moisture; my blood pressure spikes faster than the readings.

Dashboards glow nicely on a wall—why not put the whole wall to work next?

Interactive Displays & Smart Mirrors

Build a Magic Mirror dashboard

One‑way glass from a local supplier, weather forecast in the corner, and a line of motivational quotes employees secretly rewrite.

Touch‑ or gesture‑controlled kiosks

An infrared frame turns the Pi 3 into a spare parts catalog at trade shows. Visitors poke around without hijacking staff time.

Digital signage for B2B branding

Looping throughput stats in real time convinced one prospect we were twice as fast as their current vendor—because we are.

If a mirror can talk, a robot can surely roll. Cue wheels and sensors!

Robotics & Physical Computing

4‑WD robot car kits for Pi 3 beginners

We package kits with acrylic chassis, motors, and a cheat‑sheet. Kids in workshops race them like bumper cars.

Line‑following & obstacle‑avoidance bots

Black tape tracks on my office floor confuse the cleaning crew but train algorithms nicely.

Edge‑AI applications with Pi 3

TensorFlow‑Lite lets a conveyor‑belt sorter kick out cracked acrylic sheets before packaging.

Reality Check: AI on Pi 3 is possible, but heat throttles quick. Heatsinks are cheap; lost time is not.

Once a robot waves hello, you may want it to talk back—so let’s give it a voice.

AI & Voice Assistants

Google Voice HAT + Assistant SDK

Customers love telling a branded smart speaker to “open shipment status.” It queries our API and replies faster than I can.

Offline wake‑word & intent engines

Mycroft keeps data on‑site; EU clients breathe easier under GDPR clouds.

TinyML experiments

MobileNet on Pi 3 hits 2 FPS image recognition—not cinema, but perfect for detecting if the soldering iron was left on.

Teaching machines to speak is fun; teaching humans to code them is legacy. Let’s head to the classroom.

Educational & STEM Learning

Python & Scratch coding lessons

Blinking LEDs turn into Morse code chats across desks. Every error becomes a high‑five moment.

Physical computing workshops

I2C OLEDs display students’ heart rates after sprinting down the hallway. Science feels real when sweat is data.

Competitions & classroom initiatives

Last year a Code Club team used Pi 3 robots to deliver snacks around campus. They won, naturally.

Kids build prototypes; factories build thousands. Time to scale.

Commercial & Industrial Prototyping

Digital signage & kiosk deployments

We lock the root FS read‑only. Field techs yank power all day, nothing corrupts.

IoT gateway & data logger

MQTT on a Pi 3 funnels sensor data from ten production lines into Grafana. Downtime alerts shaved 6 % off defects.

Custom‑branded enclosures (MaidaTech ODM)

Our acrylic or ABS shells get laser‑engraved logos that survive warehouse abuse. Clients open the box, smile, and reorder.

Prototypes ship, numbers grow, stories end—but lessons stick.

Conclusion

The Raspberry Pi 3 may not top benchmark charts, yet it tops my “trust” chart. From retro gaming marathons to factory dashboards, it keeps earning its bench space. It boots fast, draws little power, and works with parts I can source before my coffee cools. If you need a board that bridges hobby and industry, the Pi 3 still punches above its weight—and I’m still happy to build the case that wraps it.