The latest Raspberry Pi 3 Model B+ includes a 1.4 GHz quad-core processor, along with Wi-Fi and Bluetooth support built- in, giving programmers endless ways to create and innovate. What the Pi doesn’t come with, however, are accessories. You’ll need to provide an HDMI cable, power supply, and other bits and pieces for your project. This keeps the Pi’s price down and lets you choose exactly the parts you need.
If you are interested in recording both positioning and environmental data, the Sense. The Sense HAT (B) is specially designed for Raspberry Pi, integrates multi powerful sensors such as gyroscope, accelerometer, magnetometer, barometer, temperature and humidity sensor, etc. It is communicated via I2C interface, and allows to connect more external sensors if you need.
One accessory option is a HAT, which stands for “hardware attached to top.” HATs are small devices that plug into the Pi’s GPIO pins. To qualify as a HAT, a device must conform to the Raspberry Pi Foundation’s standards:
- Implementation of an auto configuration system for the Pi.
- Regulated physical dimensions.
You can also find other accessories that don’t necessarily fit these parameters, like partial HATs (pHATs), which conform to a RaspPi Zero.
So, which of the many excellent HATs fit your project? Here are 10 Raspberry Pi HATs — including pHATs, Bonnets, and other packages that might not be considered a “HAT” in the strictest sense — that may be exactly what you’re looking for.
Raspberry Pi 0 Projects
1. The Basics: DIY HATs
You may have noticed that your RaspPi doesn’t include a prototyping area, forcing you to connect to an external breadboard for prototyping work. While this is fine for a short-term build, you may want a better solution for more permanent projects.
Some HATs allow you to build a permanent PCB (printed circuit board) and place it on top of your Pi. All circuits and sensors sit on top of the Pi’s surface area. Depending on your application, a HAT with screw terminals for external connections could be quite useful. AdafruitAB Electronics UK
2. Sense HATs
The Sense HAT was developed specifically for Astro Pi: a science and coding competition for high schoolers. The Sense HAT is an add-on board for the RPi that’s ideal for real world experimentation. These devices include sensors for orientation, pressure, humidity, and temperature, and they display data on an 8x8 LED matrix.
Sense Hat Raspberry Pi Zero Case
It also includes a tiny joystick, enabling user interface and even simple games like Pong or Snake. The Sense HAT has even traveled to the International Space Station, allowing students in the European Space Agency member states to write code that runs in space.
3. Automation HAT
The Automation HAT allows you to automate electronics and “non-smart” devices with three 24V 2A relays and three 24V sinking outputs; 24V input options are also available, along with analog sensing at 0-24V and 0-3.3V.
All of this, along with screw terminal connections and indicator LEDs for each channel, means this is the perfect shield for your next home automation project.
4. Joy Bonnet
We’ve seen lots of innovative Pi gaming solutions, whether it’s a system stuffed into an NES cartridge or a coffee table that doubles as a cocktail arcade cabinet. For an all-in-one solution, the Adafruit Joy Bonnet (or pHAT) fits on top of a Pi Zero, turning it into a controller that can also serve as a compact game system.
To make it more playable, you’ll want to add some sort of case. It can also work with the larger Pi flavors, though it won’t have the same compact feel.
5. Digital Audio HATs
If you need basic audio output from your Pi, use the 3.5 mm headphone jack or HDMI. If you’d like to upgrade your Pi audio experience, several HATs provide high-quality audio to your own speakers.
Examples include the Pi-DigiAMP+ or the JustBoom amp HAT. For a tiny boom box solution, Adafruit offers a three-watt solution that attaches to a Pi Zero. If you just want a high-quality headphone output or a DAC that allows an external amplifier to do the work of driving speakers, then a Pi-DAC+ will do the job nicely.
6. Music Creation HATs: Piano HAT and Drum HAT
Audio HATs are sufficient if you want to listen to music, but if you want to create your own music you’ll need an input method. Rather than cobble together some sort of interface with a keyboard, Pimoroni’s Piano HAT fits on top of a RaspPi directly, allowing you to play music in a nice compact package. Cycle through octaves with two pads and 13 capacitive keys per octave with attached LEDs.
An instrument pad lets you switch instruments, and it can even control an external synth over MIDI. For a slightly different take on things, Pimoroni’s Drum HAT performs a similar function but is configured to work as — you guessed it — a drum pad.
7. AIY Voice Kit
If you enjoy the functionality of Google Home, you can add that kind of speech recognition and cloud intelligence to your Raspberry Pi. The Google AIY Voice Kit (AIY for Artificial-Intelligence-Yourself) gives you the same functionality for your project.
While it does include a Voice HAT, the kit also includes:
- A speaker
- Microphone board
- Button
- A foldable cardboard enclosure
Check out Zach’s assembly video at to see this project in action.
8. Pan/Tilt HAT
While other HATs on this list take input or generate an electrical signal or audio/visual feedback, this HAT is all about movement. It’s a pan/tilt fixture that attaches directly on top of your RPi and includes a pair of micro servos and mounting hardware for a Pi camera. The Pan/Tilt HAT is compatible with conventional or programmable LEDs. With this HAT, you can scan your property or automatically track and record yourself building your next invention in an all-in-one package.
9. Cellular and GPS Communication HAT
If you’d like to add cellular communication capabilities to your Pi setup, use the GSM/GPRS/GNSS/Bluetooth HAT to make phone calls, send text messages, and transfer cellular data. This HAT features a GNSS receiver, so you can access GPS and other satellite positioning systems.
It also adds its own Bluetooth radio, which is useful if you want to pair a wireless headset with your “Pi-phone.” The device comes in a pHAT format for use with a Pi Zero or a full Pi, and even includes a 3.5 mm headphone jack.
10. Real Time Clock HAT
With Raspberry Pi’s impressive functionality, you might be surprised to learn that it doesn’t have a way to keep track of time when powered off. Add this function with a real time clock (RTC) module, some of which come in a HAT format. Here are a few. AdafruitNation ElectronicsPiShop.us
Whether you’re building your own electronic drum kit or measuring distance with a 3D scanner, a HAT can give your Raspberry Pi exactly the functionality you need. Have you used a HAT for any recent projects? Share your story in the comments!
Jeremy S. Cook and Zach Wendt are engineers who enjoy sharing innovative ways to create projects using Raspberry Pi.Jeremy writes for a variety of technical publications, while Zach works for Arrow Electronics, a major supplier of Raspberry Pi products.
Innovate with Sense HAT for Raspberry Pi por Dogan Ibrahim
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El autor de este libro esDogan Ibrahim
Descripción
Sinopsis
Ready to explore the world around you? By attaching the Sense HAT to your Raspberry Pi, you can quickly and easily develop a variety of creative applications, useful experiments, and exciting games.The Sense HAT contains several helpful environmental sensors: temperature, humidity, pressure, accelerometer, magnetometer, and gyroscope. Additionally, an 8×8 LED matrix is provided with RGB LEDs, which can be used to display multi-color scrolling or fixed information, such as the sensor data. Use the small onboard joystick for games or applications that require user input. In Innovate with Sense HAT for Raspberry Pi, Dr. Dogan Ibrahim explains how to use the Sense HAT in Raspberry Pi Zero W-based projects. Using simple terms, he details how to incorporate the Sense HAT board in interesting visual and sensor-based projects. You can complete all the projects with other Raspberry Pi models without any modifications.Exploring with Sense HAT for Raspberry Pi includes projects featuring external hardware components in addition to the Sense HAT board. You will learn to connect the Sense HAT board to the Raspberry Pi using jumper wires so that some of the GPIO ports are free to be interfaced to external components, such as to buzzers, relays, LEDs, LCDs, motors, and other sensors.The book includes full program listings and detailed project descriptions. Complete circuit diagrams of the projects using external components are given where necessary. All the projects were developed using the latest version of the Python 3 programming language. You can easily download projects from the book’s web page. Let’s start exploring with Sense HAT.
Acerca de Dogan Ibrahim
Prof Dogan Ibrahim graduated from the University of Salford with First Class Honours in Electronic Engineering. He then completed an MSc course in Automatic Control Engineering at the University of Manchester, and PhD in Digital Signal Processing at the City University in London. Prof Ibrahim worked at several companies before returning to the academic life. He is currently a lecturer at the Department of Computer Information Systems at the Near East University. Prof Ibrahim is a Fellow of the IET, and a Chartered Electrical Engineer. His interests are in the fields of microcontroller based automatic control, digital signal processing, and computer aided design.Dogan Ibrahim has been Associate Professor and Head of Department at the Near East University, Cyprus, lecturer at South Bank University, London, Principal Research Engineer at GEC Hirst Research Centre, and is now a hardware and software systems consultant to London’s Traffic Control Systems Unit.
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