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A second Raspberry Pi device has been released, just months after the revised B+ model sported additional USB ports.

Curiously, this new device doesn’t feature any additional hardware. In fact, it has fewer ports. Just what are the Raspberry Pi Foundation up to?

What The Raspberry Pi A+ Is For

Released as a revision of the original Raspberry Pi model A from 2012, the A+ looks pretty much the same. It has just a single USB port, for instance (unlike the two found on the Model B, or the quartet on the Model B+), but is also smaller than the original.

So what would you use this device for?

Like other Raspberry Pi computers, it is capable of running various operating systems 7 Operating Systems You Can Run With Raspberry Pi 7 Operating Systems You Can Run With Raspberry Pi Who can argue with a $40 computer? Especially one that also forms a good base for electronics projects! I certainly can't. But the hardware alone is only one side of the story: you still need... Read More and supporting projects as diverse as space programs Raspberry Pi Projects: A Car With Night Vision, Google Glass-like Translation, And More Raspberry Pi Projects: A Car With Night Vision, Google Glass-like Translation, And More We’ve previously looked at some excellent uses for this British minicomputer, but the fact is that it is just so versatile that there is always something amazing to talk about. Who would have thought that... Read More and media centres How To Make Your Raspberry Pi Into a Home Theater System How To Make Your Raspberry Pi Into a Home Theater System Four weeks on and I’ve been playing with my Raspberry Pi in various ways, from using it to browse the web and standard day-to-day computing tasks to playing around with the various configurations that are... Read More .

Most importantly, the Raspberry Pi A+ is just $20 in the USA (if you’re in the UK, £15.51) which means for stripped down projects requiring just one USB port, the device is even more affordable than the other versions!

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Raspberry Pi A+ System Specs

System specs for the Raspberry Pi A+ illustrate how the new version improves on the very first Raspberry Pi model.

For starters, the Model A+ is just 65mm long, 21mm shorter than the original, and the device also has lower power requirements (the power rating has been revised to 200 mA (1 W)). The smaller dimensions have affected the weight, too, with the A+ reduced from 45 g (1.6 oz) to just 23 g (0.81 oz).

muor-pi-a+

Like the Model B+, the A+ has been enhanced with the 40-pin GPIO header, and add-on boards using the HAT Standard (Hardware Attached on Top) can be connected. Meanwhile, the old SD card socket has been upgraded to a Micro SD push-push slot, much like those found on many Android devices.

Again, as with the Model B+, a new low-noise dedicated power supply has been afforded to the audio circuit.

Not everything has changed. The HDMI port remains, while there is still no Ethernet port. Unsurprisingly, RAM continues to be limited at 256 MB.

Compare and contrast these specifications to the Raspberry Pi B+ The Raspberry Pi B+ Is Here. What's Changed? The Raspberry Pi B+ Is Here. What's Changed? Read More and you’ll see that while the new version has been brought up to speed technologically, the two devices can be used for quite different purposes.

It’s Not A Replacement…

What you should be aware of is that the new model isn’t a replacement. It has a smaller form factor than the Model B, and is intended for smaller budgets and “lighter” projects.

Since 2012 we’ve featured a whole host of Raspberry Pi projects on MakeUseOf. The new Model A+ is suitable for almost all of these, so what exactly do we mean by “lighter” projects?

Mostly those that involve transit of some sort, or have weight requirements. When you’re trying to get a Raspberry Pi – possible combined with an Arduino – to sit atop a robot, a remote controlled vehicle or get it airborne, the weight of the device is all-important. A 22 gram reduction is bound to make a big difference in such cases. The GoPiGo is a good example of a project that would benefit from a smaller Model A+

As for the non-mobile projects, the Model A+ is just as capable of being a wireless print server, file server or even a web server as the Model B+.  You may need a different case, but really that’s the only difference you’re likely to see on a day-to-day basis.

Expanding The Model A+

Just like the Model B+, the Raspberry Pi Model A+ can be enhanced in various ways. The single USB connector can be enhanced with a USB hub (preferably powered) while the lower power requirements mean that battery life is likely to be increased on portable projects.

For those that use a keyboard (and perhaps a mouse) to interact with their Pi, the Model A+ really requires you to get to grips with SSH VNC, SSH and HDMI: Three Options for Viewing Your Raspberry Pi VNC, SSH and HDMI: Three Options for Viewing Your Raspberry Pi The Raspberry Pi is a remarkable little computer, but it can be time consuming to set it up and connect it to your monitor. Read More and master command line communication with your computer. Given the single USB port you’ll need a USB NIC (simple enough to setup Setting Up Wireless Networking on Your Raspberry Pi Setting Up Wireless Networking on Your Raspberry Pi Virtually every Raspberry Pi project will require a network connection, and considerable flexibility can be gained by ignoring the Ethernet port in favour of a wireless USB dongle. Read More ) and USB hub with keyboard attached to get it online initially.

However, networking isn’t really the point of the Model A+. As lead developer Eben Upton told Linux Voice, “I feel like some people missed out on why the lower-power model like the Model A can make sense. If you’re building something with robotics, or essentially any project that doesn’t need Ethernet networking, it’s a great fit.

If you’re new to the Raspberry Pi, you can find out more about its background in our interview with Eben Upton Raspberry Pi's Father Speaks: Eben Upton On The Future of Technology And More Raspberry Pi's Father Speaks: Eben Upton On The Future of Technology And More Enthusiasm radiates from Eben Upton. He's the driving force behind the Raspberry Pi, that small computer that has been revolutionising hobbyist computing since its launch in 2012. Tall, and dressed casually, the founder of the... Read More .

Should You Buy The Raspberry Pi Model A+?

We’re big fans of the Raspberry Pi at MakeUseOf, but it’s fair to say that the majority of projects we’ve featured are best attempted with the Model B or B+.

If your project is robotics based or has a transit element, then the Model A+ should be your first choice. The price and weight surely dictate that. However, if you’re looking for a solution to building a home security system based on webcams, stick to the Model B+.

Will you be buying the Model A+? If so, what will you use it for?

  1. othbert
    February 25, 2015 at 11:32 am

    I picked up an A+ as the low power requirement and single USB (for a wifi dongle) were all I need for a Squeezebox based remote speaker client.

    The A+ running the excellent and lightweight piCorePlayer distro gives me huge improvements in boot time, synchronisation and audio quality compared to my old set up of a model B with squeezeplug. I have it hooked up to a Bose soundlink mini via the 3.5mm jack.

    The B has been repurposed as an openVPN server alongside a B+ that is awaiting parts for a project and an openelec powered media centre Pi 2 B... can't get enough of these little things! :)

  2. Guest
    November 26, 2014 at 10:31 pm

    "unlike the two found on the Model B, or the quarter on the Model B+"

    I assume you mean quadruple and not 1/4 of a USB port.

  3. ed
    November 18, 2014 at 3:38 am

    the A+ looks pretty much the same. '' its a whole new board formfactor..
    the A+ has been enhanced with the 4-pin GPIO header '' 40 pins GPIO

    do your research.

    • Christian Cawley
      November 18, 2014 at 8:11 am

      "its a whole new board formfactor"

      As I explained with the line "It has a smaller form factor than the Model B" further on in the post when comparing the two new models.

      The point is, at first glance, they do *look* similar. Hence my use of "looks pretty much" rather than "identical".

      "do your research."

      Why don't you? After all, you're challenging a writer who has produced a vast quantity of material on this particular computer for this website and others, on the matter of a typo.

  4. Gunjan
    November 18, 2014 at 1:33 am

    4-pin gpio header? isn't that supposed to be 40-pin?

    • Christian Cawley
      November 18, 2014 at 8:08 am

      Aye, typo crept in there, just arranging to have it fixed.

    • Angela
      November 18, 2014 at 8:57 am

      Typo fixed. Sorry for letting that through!

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