15 im­press­ive Raspberry Pi Zero projects

The Raspberry Pi Zero is a popular single-board computer that is ideal for all limited space projects. At the end of 2021, the long-awaited successor of the Raspberry Pi Zero was launched – the Raspberry Pi Zero 2 W. Boasting a 64-bit quad-core processor, it offers up to 40% improved per­form­ance compared to the Raspberry Pi Zero.

The Raspberry Pi Zero was primarily developed as a minicom­puter for projects which use every last bit of space. To this end, the Raspberry Pi Found­a­tion expanded its single-board computer family back in November 2015 with the Raspberry Pi Zero coming in at a weight of just nine grams. The concept of the miniature computer was a success, and various suc­cessors followed in the footsteps of the Raspberry Pi Zero. The latest member of the Raspberry Pi Zero family is the Raspberry Pi Zero 2 W, which has been available since October 2021. It is similar to its pre­de­cessors in terms of di­men­sions. At a board width of 30mm, a length of 65mm and a height of just 5mm, the mini computer is suitable for all sorts of in­ter­est­ing Raspberry Pi Zero ap­plic­a­tions. Another advantage is that due to the identical di­men­sions to the pre­de­cessor models, existing cases can simply be reused.

Although nothing has changed in terms of size, per­form­ance is a very different matter. The Raspberry Pi Zero 2 W packs in more power compared to the 2015 model. The previous single-core CPU has been replaced by a more powerful quad-core processor. WLAN and Bluetooth 4.2 ensure that the Raspberry Pi Zero 2 W is suitable for almost any project despite the lacking Ethernet con­nec­tion. The HDMI con­nect­ors of the Raspberry Pi 4 have been replaced with a mini HDMI type connector on the Raspberry Pi Zero 2 W for space reasons.

As is usual with new releases from the Raspberry Pi Found­a­tion, the demand for the Pi Zero 2 W was huge right from the start with stocks quickly selling out among numerous Raspberry dealers. Since so many people could get their hands on one so quickly, it is no wonder that many new in­ter­est­ing projects were created with the help of the Raspberry Pi Zero. From practical, everyday helpers, to drones, to en­ter­tain­ment devices, it seems like amateur hobbyists have no limit to their creative ima­gin­a­tion, as the following examples il­lus­trate:

The musical Tesla coil

The first example proves the minicom­puter’s flex­ib­il­ity quite im­press­ively. Elec­tron­ics-savvy pro­gram­mer Derek Woodroffe re­designed the Raspberry Pi Zero as part of his ‘Extreme Elec­tron­ics’ project, allowing him to control one or more Tesla coils. As if this idea was not crazy enough, the visual marvel is also ac­com­pan­ied musically by an MIDI file being played, which is located on the single board computer. He reveals what software and hardware he used to create this mas­ter­piece on his website: Extreme Elec­tron­ics.

Pi0drone: the $200 drone from the Basque country

A Spanish de­vel­op­ment team led by Victor Mayoral – co-founder of robotics startup Erle Robotics- has garnered interest on the online Hackster platform with his Raspberry Pi Pi0drone. It is a drone that can be con­trolled with a standard remote control, thanks to the Raspberry Pi Zero. The material costs of this home-made aircraft came to about $200, the majority being spent on the required autopilot board PXFmini (approx. $70). The operating system is a Debian-based dis­tri­bu­tion that Erle Robotics has put together for this purpose.. The Hackster project webpage does not just provide in­form­a­tion about the project, but also gives in­struc­tions on how to construct one of these drones yourself, including a list of hardware and software required.

PiZero Cluster – 16 Raspberry Pi Zeros as a test en­vir­on­ment

The Japanese startup Idein relies on the Raspberry Pi Compute Module to develop its mul­ti­func­tion­al hardware Actbulb. Actbulb is designed for a variety of devices or com­pon­ents that use com­pu­ta­tion­al and data analysis – like light­bulbs, network cameras, mi­cro­phones, or VR/AR equipment (virtual and augmented reality). For some time now, however, Idein has not been testing the product on these devices, but rather on a composite of 16 Raspberry Pi Zeroes. The ‘PiZero Cluster’ board has 32 micro USB ports for power and data-input, as well as 16 USB A ports and 16 ethernet in­ter­faces. In­cid­ent­ally, due to delivery bot­tle­necks, the Japanese company relied on donations from other Pi owners to complete the cluster.

DIY electro-skate­board

Another exciting project using the Raspberry Pi Zero is the Raspberry Pi Guy elec­tron­ic skate­board. The young man from England provides numerous tutorials on using the mi­cro­com­puter on his YouTube channel and made de­vel­op­ing the power-driven skate­board his summer holiday project, achieving a re­mark­able result. Equipped with a single motor (120 amp, 2.2 kilowatts), the vehicle reaches a maximum speed of up to 30 kilo­metres per hour. To ac­cel­er­ate or slow down the skate­board, you use an ordinary Nintendo Wii con­trol­ler. For a complete list of the com­pon­ents used, see GitHub the raspberry pi guy.

Automated indoor gardener

A par­tic­u­larly exciting home project with Raspberry Pi Zero is the indoor gardener. The de­vel­op­ing team – two former students from Iowa State Uni­ver­sity – have taken advantage of the minicom­puter’s computing power to drastic­ally simplify caring for house­plants. To do this, the two have installed the Raspberry Pi Zero as a central component to regulate a peri­stalt­ic pump (12 volts) and an LED plant light (5 volts), which supply the plants with water and ar­ti­fi­cial sunlight. The ‘automated gardener’ script can be used to configure intensity and timing. At Hackster.io you can find a detailed guide on how to build your own household helper.

Game Boy Zero

In 1989, Nintendo released the Game Boy, one of the most suc­cess­ful portable game consoles of all time – until it was replaced by the colour-coded Game Boy Color (1998). Nearly 120 million copies of the console have been sold. For more than a quarter of a century, Game Boy rewrote gaming history and dominated the market with games like Tetris or Super Mario. Now, a hobbyist who goes by the pseudonym ‘wermy’ has breathed new life into an old classic, with the help of Raspberry Pi Zeroes. His ‘Game Boy Zero’ project not only has a colour display, but also a USB A and micro USB jacks, a mini HDMI slot, and two ad­di­tion­al control buttons.

The console runs on the operating system RetroPie, a dis­tri­bu­tion that contains emulators for different consoles, making it possible to play other classic games (including SNES, NES) that only need to be down­loaded as ROM. A converted game plugin module, including SD card, finally ensures that the minicom­puter can access the Game Boy’s hardware. Wermy doc­u­mented his de­vel­op­ment steps and published them on Imgur on April 6^th 2016.

Raspberry Pi Zero R2-D2

If you’re a fan of the Star Wars movie series, you’ve probably dreamed about having your own R2-D2. British man Les Pounder fulfilled this dream and recreated the little as­tromech­an­ic­al droid that is a mech­an­ic­al genius in George Lucas’s movies. The crucial main component: A Raspberry Pi Zero. In com­bin­a­tion with the Explorer pHAT board and two mi­cro­met­al geared motors that provide the necessary engine power, Pounder has used the minicom­puter to bring an ordinary R2-D2 toy to life. The operating system is the current version of the Debain de­riv­at­ive Raspbian. A more detailed de­scrip­tion of the project and the required software code is available on Techradar for free.

Raspberry Pi Zero AirPlay loud­speak­er

To stream music from Apple devices like the Mac, iPad, or iPhone to external speakers without using a cable con­nec­tion, your device must support Apple AirPlay. This tech­no­logy is no longer just reserved for in-house hardware like the Apple TV, there are now a huge selection of devices that have that support cap­ab­il­ity. The Belgian Frederick Vanden­bosch, however, did not let that stop him from making his own AirPlay-enabled loud­speak­er. To do this, he expanded a Raspberry Pi Zero with a pHAT DAC board from Pimoroni and enabled audio playback.

In addition to the Raspbian operating system, he installed the ShairPort software on the single board computer, which acts like an AirPlay emulator. The fine-grained finish is provided by a meranti wood cabinet, a loud­speak­er grille made using a 3D printer, and two sidebars. Those in­ter­ested can view the entire de­vel­op­ment process on hackster.io.

PIX-E: the camera for moving pictures

The Raspberry Pi Zero was also used in Nick Brewers Projekt for the World Maker Fair 2016 (Festival for in­spir­a­tion, cre­ativ­ity and in­nov­a­tion). Brewers from the USA developed the PIX-E as a camera that takes several second-long GIFs instead of ordinary photos. He makes use of the Raspberry Pi camera module, as well as the minicom­puter itself. All com­pon­ents of the camera body come from a 3D printer.

Various software com­pon­ents are installed on the Raspberry’s SD card to enable GIF pho­to­graphy. These include the image pro­cessing program Graph­ic­sMa­gick, the module user interface PiCamera, and the software GifCam, specially pro­grammed for PIX-E. The user can, for example, use the ap­plic­a­tion to set the duration of the GIFs, decide whether to save them on the SD card or in the cloud, or upload them directly to a social network.

iPod upcycling - the Spotify-capable sPot

Apple's iPod was a big seller. The classic design remains popular to this day, es­pe­cially among vintage fans. The only drawback: modern streaming services like Spotify cannot be used. However, where there’s a will, there’s a way for the talented Raspberry Pi hobbyist. For example, Guy Dupont used a Raspberry Pi Zero W to turn his fifteen-year-old iPod into a spotify-enabled sPod that lets you play and even search for songs on Spotify. He kept the iPod-style controls for that retro feeling.

Computer to-go with case and display

The Raspberry Pi Zero is already a computer only lacking a screen or keyboard to be used like a normal desktop PC or notebook. Hobbyists like Ramin As­sad­ol­lahi have used a Raspberry Pi Zero to create a handheld computer that runs the Linux operating system. In addition to the Raspberry Pi, he used a Hy­per­pixel mini display and a Q9 keyboard, among other things, for this. He produced the custom case for his Computer to-go with a 3D printer.

Security camera with WLAN function

The small di­men­sions of the Raspberry Pi Zero ensure that it is perfect for projects in narrow spaces. One such example is a security camera, which shouldn’t be dis­covered by a third-party. With just a few com­pon­ents, it is possible to turn the single-board computer into a camera that can be connected directly to WLAN. The step-by-step tutorial makes it easy to recreate the practical sur­veil­lance gadget with a Raspberry Pi Zero for home use.

Word clock

Clocks that display the time in words are popular gadgets. Un­for­tu­nately, they are very expensive to buy. But for talented Raspberry Pi hobbyists, this is no problem. With the help of a Raspberry Pi Zero and many LEDs, and a suitable letter template, nothing stands in the way of your own word clock. The time is de­term­ined by a Python program running on the single board computer and then displayed via the LEDs.

Pedal Pi: guitar pedal

There are a number of Raspberry Pi Zero ideas for musical Raspberry Pi en­thu­si­asts. For example, you can build your own guitar pedal. The guitar pedal is pro­gram­mable thanks to the in­teg­rated Raspberry Pi Zero, so the desired sound effects can be cus­tom­ised and changed. In addition to the complete in­struc­tions, you can find a number of pre-pro­grammed sound effects online. This Raspberry Pi Zero project is great even for pro­gram­ming novices.