CircuitBrains Basic

by Null Byte Labs LLC

Image of Board

CircuitPython on an ARM Cortex M0 in 1 square inch! This “Just Add Solder” castellated module is perfect for incorporating into your own project. The CircuitBrains Basic board footprint is small enough to fit into narrow spaces and wearable projects.

Technical Specs

  • Dimensions: 25 x 25 x 3.5 millimeters / 1 x 1 x 0.15 inches
  • Atmel ATSAMD21E18 Microcontroller (32-bit ARM Cortex M0)
  • 48 MHz
  • 32 KB SRAM
  • 256 KB Flash
  • 4 MB QSPI Flash
  • Onboard 3.3V LDO Regulator
  • Power and Status LEDs
  • Breakouts for SPI and I2C
  • Breakouts for 4 Analog and 8 Digital Inputs/Outputs


Coming soon. Follow the below links for manufacturing updates:


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Absolute Newest

Every time we commit new code to CircuitPython we automatically build binaries for it. They are stored on Amazon S3 by language (some which may be unreleased.) Try them if you want the absolute latest and are feeling risky.

Past Releases

All previous releases are available on GitHub. They are handy for testing but we recommend the latest stable otherwise.