new projects on Raspberry Pi

Single-board devices from Raspberry are workhorses that allow you to implement a wide variety of projects, from the simplest to complex hi-end systems. Our team really likes raspberries, so we continue to keep an eye on new projects based on the Raspberry Pi. This collection contains a few new ideas to look out for.


Raspberry Pi Zero 2 W cluster

Not so long ago, we published a review of the capabilities of a new system from Raspberry – Raspberry Pi Zero 2 W. Almost immediately after the release of the single-board, developers began to offer various options for its use. One of the sentences is a whole

cluster of four systems

The project is based on two main elements – Cluster HAT and Raspberry Pi 4 with 3GB of RAM. Well, when composing a cluster, you need the Raspberry Pi Zero 2 W themselves. These single-board devices are connected via a USB port. The software to run the entire system is OpenFaaS.

Another question arises – why and what this cluster can be used for? In general, the range of tasks that can be solved with its help is quite limited. Perhaps you can suggest some options?

Arcade game machine

This is not the first such “slot machine”, but it has a number of distinctive features. At first,

it is assembled from scratch

… The body here was assembled from plywood cut with a laser. The slot machine is designed for two players, there are 16 buttons and 2 joysticks in total.

Input systems are connected using Xin Mo 2-player controller. This board has two separate controllers and a micro-USB port for output. The board is connected to the Raspberry Pi 3B +. The authors of the project recommend using RetroPie or Lakka – the operability of the slot machine was tested on the basis of this software.

An old monitor was used to display the image, but if you wish, you can use something else, as long as the size is compatible. Audio is output from the speakers built into the system.

Illumination for New Year and Christmas

Flashing lights of garlands have always attracted the attention of both children and adults. And this project is for those who like to decorate their home for New Years, Christmas or any other holiday. The ws2811 systems are used here as LED strips, which can be synchronized with each other, programmed, etc.

It all looks very cool at work. To build the system, the author used several Raspberry Pi 4 boards. In addition, the system includes a 5-port switch, an I2C connector and an FM transmitter. Another 100W stereo amplifier and P10 panel. The resulting system is very mobile, its size allows the assembly to be carried from site to site if necessary.

The individual components were assembled using 3D printed elements. Illumination control is done using xLights, plus the author used Falcon Pi Player to work with ws2811.

Commercial server


There are many raspberry-based DIY server projects. Well, we have developed a commercial proposal based on the Raspberry Pi 4B. By the way, we are not alone in this – the first, it seems, was the Raspberry Pi Foundation itself, which supplies its single-board devices to millions of users around the world.


Cluster of 18 Raspberry Pi 4. Source: raspberrypi.org
The developers decided to create a server for their site and successfully completed the plan. To do this, they assembled a cluster of 18 fourth-generation “raspberries” with a 1.5 GHz quad-core processor and 4 GB of RAM. The system passed the tests and was sent to commercial operation.

Well, we offer a server, the cost of which (499 rubles per month) includes:

  • 1 shared public IP address
  • 24/7 support
  • Accommodation in a TIER III data center
  • Prompt replacement of faulty components

YouTube Subscriber Counter

For those who have their own YouTube channel, an interesting subscriber counter project is offered. It’s cool to post a video and watch new community members arrive (it’s not so cool to watch someone unsubscribe, but you can’t throw words out of a song). This is another project from a selection based on the Pi Zero 2 W.

The board is connected to a MAX7219 7-segment display with 8 LEDs. The system shows subscribers in real time.

The YouTube API is used to access data on the number of subscribers. When the system is connected to a power source, everything immediately “starts up” and starts working.

The project is probably one of the easiest in the collection – all you need is software and soldering. Well, and of course, an indicator that will display the number of subscribers.

Bike pc

The core of this project is the Raspberry Pi Pico microcontroller. As it turned out, it can be used relatively easily to assemble a bicycle PC, the functionality of which is not inferior to factory systems.

Assembled by Overkill Cyclocomputer, as the computer is called, in a case printed on a 3D printer. It features a 1.12-inch screen. This is Seeed Studio Grove OLED Display v2.

In the picture, all this is placed in an ordinary cardboard box, which can hardly serve as reliable protection from rain and other weather conditions. For some reason, the case, which was printed on a 3D printer, was not photographed – apparently, the developer was in a hurry to show his project.

Here you can see all the elements that were used in the project, plus the diagram and text description.

Radio controlled car


Another unusual project is Newone RC. Its author has created a radio-controlled car that can be used as a courier, delivering goods with a small mass. Drinks, food and all that jazz.

This is probably the most difficult project of all that have made this selection. The author spent about a year on the development. This is not only the creation of an electronic system, but also the design of the body, the assessment of “driving qualities”, etc.

The project is distributed under an open license, the code, the scheme and so on can be viewed and downloaded at

Github

… 3D models available

by this link

The basis of the project is a Raspberry Pi 4 with a USB modem through which the system receives commands and transmits data. Battery – 6 18650 cells connected to a BMS module. In turn, the BMS is connected to a power board (PDB) that distributes the supplied power between the Pi, modem, servos, and the electric motor.

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