Upon conceptualizing the Raspberry Pi 4, its chief founder, and creator, Eben Upton, intended it for future computer science students. He had planned for it to be a learning tool that would foster practical programming skills.
It is safe to say that the project grew legs. Today, electronic and robotics engineers, designers, hobbyists, enthusiasts, and anyone in need of an affordable computer use the Raspberry Pi.
Thanks to the Raspberry Pi’s GPIO and processing power, you can create hundreds of projects. However, sometimes, you do need a little inspiration. That is why we listed what we consider twenty-eight of the best projects for your Raspberry Pi 4 in this guide.
1、What is the Raspberry Pi?
The Raspberry Pi is one of the most affordable single-board computers (SBCs) on the market. It is arguably the most popular. Although The Raspberry Pi Foundation released its first board in 2012, it has been around since 2006.
At the time of writing this article, their latest SBC was the Raspberry Pi 4. It came in four flavors: 1GB, 2GB, 4GB, and 8GB. In addition to this, the Raspberry Pi 4 specs include a quad-core 1.5 GHz processor, wireless LAN, Bluetooth 5, 2 USB 3.0 ports, 2 USB 2.0 ports, 2 micro HDMI ports, and a micro SD card slot. The Raspberry Pi 4 is available on Amazon.
In this guide, we will cover all the projects you can build using the Raspberry Pi 4. However, it is important to note that you will need additional accessories to build most of these projects. Thus, a short overview accompanies each suggestion on this list to make things easier for you. Without further delay…
2、Raspberry pi 4 Projects
Raspberry Pi VPN Server
As you may or may not know, VPN stands for a virtual private network. A VPN helps you secure your data when you connect to the internet. It also helps you mask your IP address and hide your geo-location.
You can convert your Raspberry Pi 4 into a dedicated VPN server using PiVPN. What makes the Raspberry Pi well suited as a VPN Server is its affordability and size. In addition to this, you can run both your wireless and wired connections through it.
Converting your Raspberry Pi into a VPN server is not particularly demanding. Besides your Raspberry Pi 4 Model B SBC, all you need is the following:
- A power source for your Raspberry Pi 4
- A microSD card with a storage capacity of at least 8GB
Raspberry Pi Portable Hacking Tool
The Raspberry Pi 4 is compatible with most Linux distributions. One of these Linux distros happens to be Kali Linux.
Generally, network security specialists use Kali Linux primarily for penetration testing and forensics. Of course, you can repurpose its tools and use them for hacking.
With Kali Linux installed on your Pi, you can use it to spoof accounts, crack Wi-Fi networks and possibly hack into people’s cell phones.
Converting your Raspberry Pi 4 into a hacking machine will require a lot more work than converting it into a VPN server. To achieve this goal, you will need the following:
- The latest Kali Linux
- A battery pack or another portable power source for your Raspberry Pi 4
- A portable touch screen and case for your RPi4
- A MicroSD Card with at least 8GB of Storage
- A mini USB keyboard
- A computer
*Note: Although the above video tutorial refers to converting a Raspberry Pi 3 B+ into a hacking machine, these steps should work with a Raspberry Pi 4.
Raspberry Pi Seismometer (Raspberry Shake)
Not many people know that you can use your Raspberry Pi 4 to detect and measure the scale of earthquakes and tremors. You can essentially convert your Raspberry Pi into a digital seismograph.
While the end product may still be compact, converting your Raspberry Pi 4 into a seismometer/seismograph will require a bit of work and skill. Here is what you will need:
3. A micro SD with at least 8GB of storage capacity
4. An enclosure/case
Netflix Raspberry Pi Streaming Device
Suppose you are a casual hobbyist who simply cannot afford the accessories that go into creating a project such as the Raspberry Pi seismometer. In that case, you may be better off converting your Raspberry Pi into a Netflix streaming device.
You do not need much to convert your Raspberry Pi into a media center or streaming device. In addition to your RPi 4, you will need:
For detailed instructions, you can try Daily Dot’s tutorial.
Raspberry Pi FM Radio Transmitter
Radio broadcasting may seem like a dying art, but you can keep it alive by building your own FM radio transmitter using your Raspberry Pi. With just your Raspberry Pi and a few accessories, you can live out your aspirations of becoming a DJ or newscaster.
You will not need much to use your Raspberry Pi 4 as a radio transmitter. This is one of the easiest projects on this list. Besides your Raspberry Pi 4, you will need:
1. A steady internet connection
2. A USB Microphone
Raspberry Pi Bluetooth Enabled Speaker System
The Raspberry Pi 4 comes with Bluetooth 5. If you do not have Bluetooth speakers at home, you can use the Raspberry Pi 4 to convert your wired speakers into wireless speakers.
If you do not have a Raspberry Pi 4, but you do have RPi 3 or Zero W, you can create a Bluetooth speaker system. In addition to one of those boards, you will need:
1. A micro SD card with at least 8GB of storage
2. A power supply
3. A 3.5 mm auxiliary cable
For more details on how to execute this project, you can follow Balena’s tutorial.
Raspberry Pi Dedicated Office Productivity Machine
Despite the Raspberry Pi’s GPIO capabilities, it’s still a miniature computer and can work as such. If you’re working in an office and trying to save space, why not use a Raspberry Pi instead of a desktop tower or a laptop. That is the simple premise of this project recommendation.
This is one of the easiest projects to execute on this list. All you need to do is install a Linux Distribution on your Raspberry Pi and then hook your RPi 4 to a screen, keyboard and mouse.
1. A micro SD card with at least 8GB of storage capacity
2. A Monitor
5. Internet connection
For the details of this project, you can visit the official course page.
Raspberry Pi Wi-Fi Booster
If you live in a large house or just have problems with Wi-Fi reception in one of your rooms, you can fix this by installing a wi-fi booster. If you have a Raspberry Pi 2, 3, or 4 lying around, no need to purchase a new Wi-Fi extender. You can simply convert your SBC into a dedicated or part-time Wi-Fi booster.
Building this project is straightforward and simple. You can use your Raspberry Pi’s internally built Wi-Fi. If you’re using an older Raspberry Pi (1 or 2), you’ll need a Wi-Fi dongle for it.
1. Micro SD with a storage capacity of at least 8GB
2. Power supply
3. Raspberry Pi Case
If you want to learn more about this project, you can visit PiMyLife’s Wi-Fi extender tutorial.
Raspberry Pi Ultrasonic Theremin
The theremin is an electronic musical instrument that Lean Theremin invented in 1920. It is one of the easiest instruments to learn to play. In addition to this, it is also an easy project to build with your Raspberry Pi 4.
3. 330-ohm Resistor
4. 470-ohm Resistor
5. Solderless Breadboard
6. Ultrasonic Distance Sensor
7. 3 * Male to Male Jumper Leads
8. 4 * Male to Female Jumper Leads
This is one of the more challenging projects on this list. It’s also one of the most rewarding and practical. In addition to this, it is incredibly educational. If you want to learn more about this project, you can visit the official project page.
Raspberry Pi Wall Mounted Google Calendar
Since we have calendars on our phone, it seems that we do not need a wall-mounted paper calendar. However, sometimes, it is easier to look up and remind ourselves of important dates without pulling our phones out. This project helps you convert an old screen and a Raspberry Pi into a wall-mounted digital Google calendar
1. Wireless home network
2. Micros SD card with a storage capacity of 2GB or larger
3. Raspberry Pi power supply
4. Micro USB cable
5. USB keyboard and mouse
6. Monitor (preferably with HDMI port)
7. HDMI cable (or HDMI to VGA cable)
8. Wall bracket for your monitor
If you want detailed instructions for this project, you can visit the Instructables page.
Raspberry Pi AI Thermometer
It would be better for those looking for a more challenging and useful project to convert your Raspberry Pi into an AI-enabled thermometer. This project will teach you some of the basics of working with AI on your Raspberry Pi. This thermometer is capable of measuring your skin’s temperature so it can determine whether or not you have a fever.
1. IR Camera
2. RGB Camera
If you want further details on this project, visit Hackstar.io’s tutorial page.
Raspberry Pi Automatic Smart Plant Monitor
For anyone with a thriving career or demanding job, keeping track of your garden can be a tough ask. However, with a little ingenuity and expertise, you can build a smart garden monitor that keeps track of your plants’ lighting and moisture.
This project will require you to use your Raspberry Pi board with an Arduino Uno board. This is the hardware you will need:
1. Arduino Uno Board
2. PARTICLE Argon
3. DHT11 Temperature and Humidity Sensor
4. SparkFun Moisture Sensor
5. CDS photoresistor
7. Raspberry Pi Raspbian (Raspberry Pi 4 OS)
8. Arduino IDE
If you want a detailed set of instructions, you should visit Hackster’s dedicated page.
Raspberry Pi Remote Smart Camera Focus
If you found that the Thermometer was a little tough for you, you can build a remote smart security camera with a focus. The Raspberry Pi Foundation makes this easy for you. All you need is their high-quality camera and a bit of python code.
2. Lego Part No. 18938
3. Lego Compatible Servo
4. Raspberry Pi Raspbian
Once again, for those looking for instructions, Hackster.IO has an amazing tutorial for you.
Raspberry Pi Intercom System
This project takes an old 1986 intercom system, refurbishes it, and updates it for the new millennium.
1. Google AIY Voice Kit
2. Vintage Intercom
You can find the intercom on Radio Shack or eBay. For more details on this project, you can visit Instructables’ tutorials.
Raspberry Pi Photo Booth
You can use your Raspberry Pi to create a smart photo booth that takes your picture and uploads it to Google Photos.
To set this project up, you will need a few accessories in addition to your Raspberry Pi 4.
1. Raspberry Pi Camera Module
2. Micro USB Power Supply
3. Raspberry Pi Touch Display
4. Machine Screws, M2.5, 10mm x 2
5. Machine Screws M2.5, 6mm x 2
6. Machine Screws M2x6mm x4
7. Mounting brackets and/or enclosure (optional)
8. Hex nut, ¼-20 (optional)
Once again, Hackster.io has a lovely tutorial for this project.
Raspberry Pi Sleeping Cycle and Light Alarm Clock
Alarm clocks can be loud and intrusive. The alternative to this is an alarm that plays soothing sounds or displays a light that gently wakes you up. You can either purchase an orb that emits light depending on the time of the day or just build one yourself using your Raspberry Pi 4. This is the premise of this project.
This project combines some of the components we introduced with the other projects in this guide.
1. Active Speaker
2. 3 x 1 Watt RGB LEDs
3. Raspberry pi 4 fan
4. Raspberry Pi 4 heatsink (optional)
5. 2 x temperature sensors
6. 1 x light sensor
7. 2 x accelerometers
8. 1 x pushbutton
For more information on this project, you can visit Instructables’ tutorial.
Raspberry Pi Pen Plotter
The Raspberry Pi Brachiograph’s creators have dubbed it as one of the simplest yet artistic drawing devices on the market. In essence, it looks very rudimentary. You can make it with a few wires, a peg, and an ice cream stick. It is a fun and educational project to undertake.
1. 2 x wooden craft sticks
3. Clothes peg
4. 3 x servo motors
You can learn more about the BracioGraph on its official page.
Raspberry Pi Email Notifier
Email messages and mailboxes can feel like esoteric and abstract concepts. The only way you can access your email messages is through a device. Thus, receiving alerts for new mail is the most common way through push notifications and other digital alerts. This project allows you to make your email notifications more physical. This project will light up whenever you get a new email message.
2. Raspberry Pi USB power supply
3. Raspberry Pi Compatible USB Cable
4. 22AWG Stranded Wire
5. 10K-Ω resistor x 5
6. 220-Ω resistor x 5
7. white LEDs x5
8. Plywood (5mm and 3mm)
9. N-Channel Power Mosfet transistors
11. Various screws and nuts
12. Glue gun
For a more detailed hardware list and instructions on how to build this project, you can visit Instructables’ comprehensive tutorial.
Is brewing IPAs one of your favorite hobbies? Thanks to technology, you can make brewing your beer a lot easier. You can use your Raspberry Pi to track your brew’s temperature, adjust it, and document all of its information.
1. Hacked Fridge
2. BrewPi Spark
3. Computer, phone, or tablet
For a more detailed list of tools and hardware, you can visit the official Brewpi project page.
Raspberry Pi Light Painter
In this project, you will be creating your very own Aurora Borealis with a set of LEDs, a camera, and a Raspberry Pi.
1. Digital Addressable RGB LED strip
2. DC Power Jack
3. 2 Amp power supply
4. 10 Amp power supply
5. Pi Cobbler breakout kit
6. JST 4-pin inline plug & receptacle cable
For more information about the tools, hardware, and prerequisites for this project, visit the official Adafruit project page.
Raspberry Pi Cluster Computer
The Raspberry Pi 4 works well as a bottom tier or mid-range standalone computer. However, if you combine a set of Raspberry Pis, you can create your very own supercomputer.
1. 4 x Raspberry Pi 4
2. Raspberry Pi 4 Cluster Case
3. Ethernet switch
4. Multiport USB PSU
5. USB C Cables
6. Ethernet cables
For a more detailed hardware list and the instructions on how to build this project, visit The Magpi tutorial page.
Raspberry Pi Smart Garage Door Opener
Thanks to the Internet of Things, you can access all your IoT-enabled smart devices from smartphones or PCs. You can also do this using your Raspberry Pi 4.
2. Relay module
3. Connecting wires
If you want more details on this project, you can visit CircuitDigest’s official tutorial. In addition to this, we recommend that you visit the Raspberry Pi Lock website to learn more about using RFID with your Raspberry Pi 4.
Raspberry Pi Android TV Box
Earlier in this guide, we spoke about converting your Raspberry Pi into a streaming device. This works on the same principle, but instead of using your Raspberry Pi for Netflix, you can use it as an Android media box.
1. A micro SD card with a storage capacity of at least 8 GB
2. A power source for your Raspberry Pi
3. USB keyboard and mouse/ combo remote
4. USB Flash drive with a storage capacity of at least 4 GB
5. An HDMI cable
6. Unofficial Lineage 17.1 for Raspberry Pi 4
For more details on how to execute this project, visit the Make Use Of tutorial.
Raspberry Pi Object Tracker
If you have ever been interested in teaching yourself about deep learning with a Raspberry Pi 4, this project is for you. Astute users will combine it with the Raspberry Pi Brachiograph and draw the objects that the Raspberry Pi object tracker detects.
1. Raspberry Pi Camera V2
2. Pimoroni Pan-tilt HAT Kit
3. Micro SD Card 16+ GB
4. Micro HDMI Cable
For detailed instructions on building this project, you Towards Data Science have an awesome tutorial that you can follow.
Raspberry Pi ADS-B Receiver
An automatic dependant surveillance-broadcast receiver (ADS-B) is a form of surveillance technology used to track airplanes. You can build your own PiAware ADS-B ground station.
We recommend that you use a Raspberry Pi 4GB for this project. Other than that, you’ll need the following:
1. Micro SD card with at least 8GB of storage capacity
2. Power supply for Raspberry PI
3. Micros SD card reader for your computer
4. USB SDR ADS-B Receiver
5. 1090 MHz Antenna
For more details, you can visit FlightAware’s Pi Aware tutorial.
Raspberry Pi Christmas Tree Light Show
You can use your Raspberry Pi to make your Christmas decorations a new dimension. This project may seem straightforward, but it will require you to work with relays and LEDs.
1. Micro SD Card (2GB+)
2. SainSmart 8 Channel 5V SSR Module Board
3. Jumper wires
4. JST 4-pin inline plug & receptacle cable
5. 32ft roll of wire (or four 8 ft pieces of wire)
6. Extension cord x 8
7. 2 x Power distribution block
8. Power strip
9. 5 Volts, 3 Amps or greater to drive LEDs and Pi power supply
10. 5 Volts, 1 Amp or greater to drive SSR module power supply
For more detailed instructions and a list of hardware, you will need the star and tree and pay a visit to the Instructables tutorial.
Raspberry Pi PirateBox
A pirate box allows you to share files offline anonymously. You can use it as a portable offline file or media center.
- Micro SD Card (8GB+)
- 5V micro USB power supply
- USB Flash Drive
- Ethernet cable
- PC with an ethernet port
- 5V USB Battery
Visit the official PirateBox site for additional instructions.
There you have it. In this guide, we featured 28 of the best Raspberry Pi projects. We made sure that all these projects were ideal for beginners. However, even intermediary Raspberry Pi users can gain a bit of enjoyment from building some of these projects. If you want a more game-oriented endeavor, you can try building a Raspberry 4 Retropie console. For more project ideas, you can visit any Raspberry pi 4 Reddit subreddit. Alternatively, you can simply run Windows 10 on your Raspberry Pi 4 and use it as a computer. Nevertheless, we hope that you have found this guide helpful. Thank you for reading.