Atto Arduino - world's smallest Arduino?

[last update: 2026-08-11]
Arduino boards available
Piksey Atto Programming/Operation
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• There are at least two versions of boards called "Atto"
  • The first was sold by nionics:
    
    
    (link to:) Nionics Atto
    
    
    (link to:) Nionics Atto-pinout
    
    
    (link to:) Nionics Atto Specs
    • It was scheduled to be released in October of 2019 by Nionics ((link to:) nionics.com) for around $14.
    • As of Aug-2020 their site says it will be available in 2021
    • As of Aug 2026, google says it had repeated production issues and was never released.

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  • The second, Piksey Atto, with a slightly different layout/footprint,:
    
    
    (link to:) Piksey Atto-pinout
    • Available now at (link to:) Tindie for $10.
    • Piksey Atto Programming/Operation
    • kickstarter: (link to:) kickstarter

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