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Featuring a 32-bit 48MHz ARM Cortex M0+ w/ 16K of ram the Tau packs a ton of power in a tiny package!
Featuring a 32-bit 48MHz ARM Cortex M0+ w/ 16K of ram the Tau packs a ton of power in a tiny package!
157 backers pledged $6,235 to help bring this project to life.

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Tau: The tiny 32-bit Arduino Zero compatible!

$6,235

157

What is the Tau?

The Tau is an extremely affordable, open source, miniaturized version of the Arduino Zero!

Featuring a 32-bit ARM processor running at 48MHz, and boasting 16K of ram, the Tau is far more powerful than your standard Arduino.

Finally, being open-source, you're free to modify it as you wish and integrate it into your own designs - without ever needing to pay any royalties or licensing fees!

The Tau!
The Tau!

  

Technical details:

  • Microcontroller: Atmel ATSAMD21E17A ARM Cortex M0+
  • Clock speed: 48 MHz
  • Operating voltage: 3.3V
  • I/O pin limits: 3.3V, 3mA
  • Digital I/O pins: 12 w/ 10 PWM channels + 2 dedicated I2C pins w/ pullups
  • Analog inputs: 3 12-bit ADC channels
  • Analog outputs: 1 10-bit DAC
  • Flash (program) memory: 128 KB RAM: 16 KB
  • Voltage regulator: TLV702, 3.5V - 5.5V input / 3.3V, 300mA output
  • Dimensions: 1.1 x 0.6" (28mm x 15mm)
The Tau's PCB
The Tau's PCB

  

Programming

Programming is easy! Like most Arduinos, you simply plug the board into your PC using a MicroUSB cable, select the board you want to program, and hit the upload button in the IDE when you're ready!

Other Features

Power + Status LEDs

Like most Arduinos, the Tau features a few LEDs. A green LED lets you know that the Tau is receiving power, while a red LED is connected to pin 26 aka PIN_LED_TXL. This LED can be used as a status indicator.

While I could have connected the red LED to pin 13, which is the usual pin for a status LED on an Arduino, connecting it to pin 26 avoided the need to isolate it from the SPI bus with a mosfet, and left room for the power LED!

10-bit DAC

Say goodbye to the Tone() command forever! Turn your Tau into a virtuoso by connecting an amplifier to pin A0 and the conveniently placed GND pad and use the Audio library to play .WAV files from a MicroSD card!

Tau Pinout
Tau Pinout

  

Why another Kickstarter?

The reason I'm launching a new campaign is because though the PCB design was flawless, there were numerous issues getting the Zero bootloader working with the new chip, and resolving them took months. As a result, ongoing business expenses ate through most of the funds I'd planned to invest in spare units, and now, only a month after they finally began shipping, I'm out of stock!

So, I need your help. I want to manufacture enough Tau that I'll be able to keep them in stock for many months to come. Every $2,500 I raise will allow me to manufacture enough spares to keep the Tau in stock for another 3 months. And if I can raise enough to keep them in stock for the next year, then there's an excellent chance I'll be able to then keep them in stock for many years to come!

Risks and challenges

I don't anticipate any issues delivering these boards to you. The issues that plagued the previous campaign have been resolved, and the design is ready for manufacture.

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Support

  1. Select this reward

    Pledge US$ 15 or more About US$ 15

    One Tau!

    Includes:
    • Tau
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    33 backers
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  2. Reward no longer available

    Pledge US$ 26 or more About US$ 26

    Two Tau! [EARLY BIRD]

    $13 ea!

    Includes:
    • Tau
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    Ships to Anywhere in the world
    Reward no longer available 25 backers
    $
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  3. Select this reward

    Pledge US$ 28 or more About US$ 28

    Two Tau!

    $14 ea!

    Includes:
    • Tau
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    37 backers
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  4. Reward no longer available

    Pledge US$ 36 or more About US$ 36

    Three Tau! [EARLY BIRD]

    $12 ea!

    Includes:
    • Tau
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    Ships to Anywhere in the world
    Reward no longer available 15 backers
    $
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  5. Select this reward

    Pledge US$ 39 or more About US$ 39

    Three Tau!

    $13 ea!

    Includes:
    • Tau
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    14 backers
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  6. Reward no longer available

    Pledge US$ 55 or more About US$ 55

    Five Tau! [EARLY BIRD]

    $11 ea!

    Includes:
    • Tau
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    Ships to Anywhere in the world
    Reward no longer available 10 backers
    $
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    Pledge US$ 60 or more About US$ 60

    Five Tau!

    $12 ea!

    Includes:
    • Tau
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    Ships to Anywhere in the world
    13 backers
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  8. Reward no longer available

    Pledge US$ 95 or more About US$ 95

    Ten Tau! [EARLY BIRD]

    $9.50 ea!

    Includes:
    • 10× Tau
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    Ships to Anywhere in the world
    Reward no longer available 5 backers
    $
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  9. Select this reward

    Pledge US$ 105 or more About US$ 105

    Ten Tau!

    $10.50 ea!

    Includes:
    • 10× Tau
    Less
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    Ships to Anywhere in the world
    2 backers
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Funding period

- (20 days)