How to Best Raspberry Pi HATs Expansion Boards

An excellent platform for learning and experimenting on Raspberry. We can learn coding, build robots, monitor satellites in orbit, and more. To build the tops, it helps to have the correct HAT (attached on top of the hardware). HATs are expansion boards that connect to a set of 40 GPIO pins on a Raspberry Pi and add functionality such as lights, motors, sensors, and fans.

There are hundreds, if not thousands, of Raspberry Pi HATs on the market, and most of them will work with any model of pie with 40 pins, each model has been launched since 2014, but you need GPIO pins attached above the gyro. Have to do.

To help you choose, we have listed the HAT on the best raspberries below based on the use case. These extension boards are called simple exercises or AI Can be used to make arcade cabinets.

Hot Shopping Tips on Raspberry
When buying HAT on Raspberry, ask yourself these questions:

What is HAT? If it is for a particular project, is this what you need to do? If it is for children, does the HAT have the appropriate features to grow with their learning?

Does HAT work with your Raspberry Pi? The B + 40 pin on the Raspberry Pi has GPIO since 2014, and all HAT boards are designed for this, but only Cap works on 3B + or 4 that use the PoE (Power over Ethernet) feature.

How can HAT be programmed? Does it come with the Python module, and is it user friendly? Can it be programmed in another language? Do you have documentation to support your practice?
Does HAT use all your pins? HATs on most raspberries physically cover a total of 40 GPIO pins, most of which allow pass-throughs, so you can use those pins with other devices or use another HAT stacked above it first. can do.

For general purpose experiments in electronics, Explorer Hot Pro is all you need. Four capacitive touch pads and four crocodile clip pads provide touch and capacitive inputs that can be used to convert carriers such as fruits and aluminum foil into fun inputs.

By buffering 5v tolerant inputs and outputs, you can easily use the simple electronic components you would normally need for an Arduino board. Perhaps most importantly, it has four built-in analog inputs, so you can attach analog devices such as potentiometers and joysticks without the need for an additional analog-to-digital converter chip (the above is nothing of its own).

Built in two motor controllers means that we can build a robot using this board. Built on breadboard it is on top of all, we can build our experiments on it. We will lose access to all GPO pins when using the Explorer HAT Pro, but given that this board offers very different input / outputs and is designed to keep beginners in mind, we can forgive this loss .

A fun board that can be used to create color light shows and teach the concept of core coding, the Pimoroni Unicorn PHAT is no larger than the Zero on the Raspberry, but has 32 controllable multi-color LEDs! Hot on this little Raspberry includes all GPIO pins, but it only uses three of them, so clever hacks can be used to include it in the project. Each LED can be controlled individually, changing brightness and color using the natural Python 3 library. Keep an eye out (or use a diffuser) because these lights are really bright.

If you want to build a retro arcade machine with arcade joysticks and buttons, Pimoroni Picade X Hot is the board to get. The X HAT has all the connectors you need to attach a joystick and 12 buttons, including functions such as adding a coin or 1UP button.

The attached “hack header” provides a connection to the I2C interface with easy to add additional components. The Picade X HAT delivers sound via the I2S interface via GPIO and the 3W mono amplifier delivers audio to external speakers (sold separately). The Picade X HAT has a USB port that can be used to power any speaker.

The latest version of the Picade X HAT uses the Type-C connector, which saves as much juice as the Raspberry Pi 4 or earlier models. Older versions of the X HAT, which may still be on sale, use the Micro USB connector, which only contains 3 or so of pie juice.

Once you install a one-line script, Picade X works flawlessly on popular emulation platforms such as HAT Retropy and Laca, which both look like a keyboard, where you can assign each button to a function (keyboard Assigned to key).

A potential problem with the Picade X HAT is that gaming will burden your processor and the board will cover your CPU.

All-round Raspberry Pi Hot, Sense Hot features can be used onboard temperature, humidity, air pressure, accelerometer, gyroscope, and magnetometer sensors to best use science experiments via Python and Scratch. Joysticks and 8 x 8 LED matrices can be used to create and control simple games.

If you work with children or want to start having fun with pie, then Sense Hot should top your shopping list. The overall practice provided by this board is excellent. A copy of this HAT is about the International Space Station and each year students compete to run their code on it. . . From space, to raspberry pie in space.

The I2C interface is hidden on Raspberry as part of the GPIO. This is an optional configuration of the standard GPIO and provides advanced users a four-wire interface for multiple devices connected in a series. The Breakout Garden is hot on Raspberry, providing simple ways to connect I2C devices.

Additional breakout boards range from LED matrices to air quality sensors and thermal cameras with one of six slots and this can easily be achieved thanks to the custom Python 3 library. It is very configurable and simple for citizen science projects.

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