Raspberry Pi

pi-top [4] is a Raspberry Pi neatly integrated as a portable IoT computer with OLED display

(January 24, 2019) The latest pi-top product is a very nice case integrating a portable power pack, an OLED screen, four buttons, and access to the GPIO pins. The pi-top team has always sought to make it easier for youngsters to get started on IoT projects with Raspberry Pi's by offering easy-to-use cases. The pi-top [4] is about building portable hand-held gadgets that can interface with real hardware. The kit includes a Raspberry Pi 3B+, the aforementioned case, a battery pack for portable power, and a handful of sensors.

Build a DLP2000 based pocket projector with Raspberry Pi Zero

(June 17, 2018) The TI DLP2000 is a compact low power video projector, and while the evaluation board is meant for the Beaglebone it can be easily wired to a Raspberry Pi Zero W. This project, along with the custom adapter board, makes for a very compact video projector that's easily battery powered.

Build a security camera system with Raspberry Pi Zero and cheap webcams

(June 15, 2018) Implement a full security camera system supporting multiple cameras, with night vision, motion detection, uploading video to Google Drive, all built on the Raspberry Pi Zero platform. The Zero W makes a perfect security camera because of its small size, and the NO-IR camera supports night vision (with IR light source) in a slim case that directly supports the camera.

Build your own inexpensive super-computing cluster with Raspberry Pi 3's

(April 15, 2018) Want a cheap super-computer farm? A Raspberry Pi cluster can pack a lot of computing power into a small space at low energy consumption. Single-board-computers like the Raspberry Pi 3 are inexpensive, consume a miniscule amount of power, run Linux making them instantly accessible by all programmers, and support all kinds of computing tasks, including supercomputing. The Raspberry Pi's themselves run off a USB power supply you might otherwise use to charge cell phones. Simply stack a bunch of them up, wire them to an ethernet switch, and you have a computing cluster on the cheap.

The SunFounder smart Video Car kit for Raspberry Pi

(April 6, 2018) This cool Raspberry Pi-based toy car can roam around, shoot video as it goes, panning and tilting the camera on 2-axes, all of which is sure to make any teenager go "WAY COOL".

Raspberry Pi board and accessories buying guide.

(March 3, 2018) DIY makers around the world are building customized computerized gizmos thanks to the Raspberry Pi, and similar computers. These diminuitive computers pack a lot of computing power, at low energy requirements, and by running Linux they are more approachable than microcontrollers like the Arduino. The Raspberry Pi is the best known of this class of computer. Because of the very large user community, there is a ton of accessories, books, tutorials, and more focusing on the Raspberry Pi.

Booting diskless Raspberry Pi remotely over USB to auto-create a Raspberry Pi cluster

(November 18, 2017)

The Raspberry Pi is a cool computer with one flaw - that it runs off an SD card. SD card's aren't terribly reliable, and it's tedious to create individuated SD cards for each Pi in a cluster. This guy came up with a "Cluster Hat" that not only creates a Pi Cluster using Raspberry Pi Zero's, but also has them booting over USB from a master controller Raspberry Pi 3.

Creating a Docker Swarm with Raspberry Pi Zero's for easy cluster computing

(November 18, 2017)

Docker is a powerful basis for cloud computing especially if you use Docker Swarm's. This tutorial shows how to autoscale Docker images over a cluster of inexpensive Raspberry Pi Zero computers. It's an interesting way to learn about Docker and using Docker Swarms. The example shows autodeployment of Node-RED instances to individual Pi Zero's which is raises interesting ideas in my mind.

A downside to this example is the laborious setup. Each Pi Zero must have a customized boot SD card created. Seems to me that marrying this idea with the "Cluster HAT" hardware might be easier to manage, since you don't create a customized SD card for each machine in the cluster.

Booting a Raspberry Pi from a regular disk, avoiding the flaky SD card

(August 7, 2017)

The Raspberry Pi is a cool little computer allowing you to do lots of crazy DIY projects interfaced through the GPIO port. While the Raspberry Pi is a small embeddable computer, because it runs Linux the Raspberry Pi is instantly approachable by any programmer. The biggest flaw in this picture is that it uses an SD card as the boot device. SD cards are not exactly fast nor reliable, preventing the Raspberry Pi from being used in serious production situations.

In April 2017 the Raspberry Pi foundation released the ability for the Raspberry Pi Model 3 to boot off a drive connected via USB. That instantly opens the door to using reliable regular disks rather than unreliable SD cards. The downside is that disks must connect via USB2 limiting disk throughput speed. As with anything there are plusses and minuses, but this is an interesting step forward.

For those seriously interested in using a Linux-Single-Board-Computer with a regular disk, some of the other devices will be a better choice. For example the Orange Pi Plus 2 has a SATA connector.

Inexpensively stream your MP3 collection with Raspberry Pi and Pi MusicBox

(April 10, 2017) Why pay megabucks to buy a commercialized music streaming gizmo that requires a monthly fee? You may already have the MP3 files, and with the right software a simple computer like the Raspberry Pi is sufficient to stream the music anywhere on your home network. The Pi MusicBox software makes it incredibly easy to setup, the only wrinkle being to have a large enough storage device. Fortunately the Raspberry Pi can easily use a USB hard drive.

Build your own security camera system with Raspberry Pi and cheap webcams

(April 7, 2017) You can build a powerful and flexible motion sensing security camera system using open source software on a Raspberry Pi and similar single board computers. The key is the MotionEyeOS that neatly bundles everything you need into a Raspberry Pi image. Simply burn it to an SD card, attach cameras, boot the Raspberry Pi, and start configuring. It easily supports monitoring multiple cameras, which can be USB webcams, WiFi cameras, the Raspberry Pi camera, or other MotionEyeOS instances. I have an original-version Raspberry Pi (low CPU power) driving two cameras and it handles things just fine.

Installing OpenVPN on a Raspberry Pi Zero W, inexpensive security for your peace of mind

(March 31, 2017) Nowadays our personal privacy is being threatened by new government policies. Fortunately the open source world gives us tools with which to secure our lives. This tutorial goes over installing OpenVPN on your home network, giving you a secure method to access resources on your home network from anywhere else. Suppose you have a NAS with many terabytes of data at home, but you're traveling thousands of miles away and need to access that data. A VPN service on your home network provides a porthole through which to do so, provided you have VPN software on the computer you're carrying.

Raspberry Pi Zero W, inexpensive Zero goodness, now with WiFi for just $10

(February 28, 2017) The original Raspberry Pi Zero was a game-changer for inexpensive computers, offering a full-fledged for just $5. The biggest problem was the lack of WiFi. The Raspberry Pi foundation have now fixed that, unveiling the new Zero W with both WiFi and Bluetooth.

How to back up your Raspberry Pi SD card, or copy it to another (larger?) Raspberry Pi SD card

(December 15, 2015) SD Cards aren't exactly the most reliable of data storage devices. What happens if you've put hundreds of hours of work into a Raspberry Pi system, it's all on your SD Card, and the card craps out. Have you saved your work? Or maybe you need to move to a larger SD Card because you've run out of space. Or maybe you want to duplicate the card to have additional systems. These tasks are pretty easy, but not intuitively obvious. It'll take some time at the command line, but fortunately the commands are easy.