Tag Archives: 32-bit Arduino

Going hands-on with the now-on-sale Arduino Zero


It’s official! Makers in the U.S. can now buy the 32-bit Arduino board online. 


In addition to a number of other announcements during his Maker Faire Bay Area “State of Arduino” address, Massimo Banzi had finally revealed the dates for the highly-anticipated Zero board to a standing-room only crowd. In fact, MAKE: Magazine would even go on to call it “one of the biggest pieces of news” from this year’s show and tell.

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And now available (as of June 15th) for purchase within the United States, here’s a quick refresher on the 32-bit Arduino unit that is bound to become a Maker hit over the summer. While its form factor may share that of the Leonardo, the Zero boasts an Atmel | SMART SAM D21 ARM Cortex-M0+ core, enabling the board to run much faster and pack more of a punch than its 8-bit counterparts.

It’s also worth mentioning that the latest device offers users the ability to easily talk to the cloud, thanks to an increase in bits and clock cycles to deal with what’s coming in and going out. This allows Makers to bring their wildest (and smartest) Internet of Things projects to life. As the Wizard of Make Bob Martin explains, “You can do this with an 8-bit microcontroller, but sometimes with data streams, it’s like drinking from a firehose.”

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Key hardware specs include 256KB of Flash, 32KB SRAM in a TQFP package and a clock speed of 48MHz. In comparison, the 8-bit Leonardo (ATmega32U4) comes with only 32KB of Flash, 2.5KB of SRAM and merely runs at 16MHz. One its other notable features is the Atmel Embedded Debugger (EDBG), which provides a full debug interface without the need for any supplemental hardware. EDBG supports a virtual COM port that can be used for device programming and traditional Arduino bootloader functionality, and is entirely compatible with Atmel Studio to give users the ability to import their sketches directly and do source-level debugging.

The Zero sports six analog and 14 digital pins, all of which except for the Rx/Tx pins can also serve as PWM pins. Meanwhile, the analog pins have a 12-bit ADC instead of the Leonardo’s 10-bit ADC, significantly improving analog resolution. Though the new board does not have EEPROM, it does support 16KB by emulation. In other words, Arduino sketches relying upon this feature will still run without any hiccups.

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Upon receiving the board, a user may notice that that Zero’s silk includes an additional graphic element: the Genuino logo. (For those who may not know, Genuino — meaning “genuine” in Italian — is Arduino’s global sister brand.)

“We added the Genuino logo to the Arduino Zero to stress its authenticity, and to make it easier for the Arduino community to spot original boards. We are going to include this logo to all genuine Arduino boards from now on,” the crew says.

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In tandem with its debut on the Arduino U.S. online store, the team has unveiled the Arduino IDE 1.6.5 with a bunch of enhancements as well as support for the Zero. This version of the incredibly popular IDE will keep the serial monitor open while uploading, an “Open Recent” menu that shows the last five opened sketches and a new modern editor, among many other improved elements.

Interested? Head over to the Zero’s official page here, where the board is currently going for $49.90. As you wait for its arrival, watch below as the Wizard of Make gives MAKE’s Alasdair Allan a hands-on demonstration.

Neutrino is an open-source Arduino Zero variant


This 32-bit board crams the functionality of the Arduino Zero into a smaller package.


During last year’s Maker Faire Bay Area, Arduino revealed its latest development board, the Zero. Based on the Atmel | SMART SAM D21, the 32-bit MCU packs 256KB of Flash, 32KB SRAM in a TQFP package and is compatible with 3.3V shields that conform to the Arduino R3 layout. Inspired by this design, Maker Sean Swift and the Rabid Prototypes team took it upon themselves to develop an inexpensive, open-source variant that takes the functionality of the Zero and crams it into a much smaller form factor. As expected, the Neutrino is also based on an ATSAMD21G18, runs at 48MHz and boasts 32KB of RAM.

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“Neutrino is far more capable than your typical Arduino,” its creators note. “And because it has the same processor and pinout, all libraries written for the Zero will work on the Neutrino without any modification.”

Like most Arduinos, Neutrino was built with ease-of-use and the DIY community in mind. That being said, the board can be programmed using either the Arduino IDE or a JTAG programmer, like the Atmel-ICE. Makers simply plug it directly into their PC using a Micro-USB cable, select the unit that they wish to program, and hit the upload button within the IDE when ready.

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The Rabid Prototypes crew says that the SAM D21 based device ships pre-installed with the Zero bootloader, and will auto reset when the USB serial port is opened by the IDE. In the event that this fails, “You can always hit the reset button on the board to force it to enter bootloader mode after your program finishes compiling,” Swift adds.

The Neutrino comes with a convenient power multiplexing circuit, allowing Makers to recharge via USB, battery or a 3.3V regulated supply when necessary. What’s more, the board can power up USB devices when acting as a USB host, but as Swift notes, this will require a 5V supply to the VIN pin. A 500mA resettable polyfuse protects the Neutrino and PC if too much current is being drawn.

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Beyond that, Neutrino boasts a number of other notable features as well. For instance, Makers can employ its built-in LED as a status and power indicator, transform the board into a virtuoso by connecting an amplifier, or link to a USB LiPo charging backpack when on the go.

Other notable specs:

  • Clock speed: 48MHz
  • Operating voltage: 3.3V
  • I/O pin limits: 3.3V, 7 mA
  • Digital I/O pins: 14 (with 12 PWM)
  • Analog input pins: 6 12-bit ADC channels
  • Analog output pins: 1 10-bit DAC
  • Flash memory: 256KB
  • SRAM: 32KB
  • Voltage regulator: 3.7V – 6V input / 3.3V, 500mA output
  • Dimensions: 1.5″ x 0.7″ (38mm x 18mm)

Sound like a board you’d love to tinker with? Head over to its official Kickstarter page, where the Rabid Prototypes team is currently seeking $5,000. Shipment is expected to begin in June 2015.