---
layout: download
board_id: "circuitbrains_basic_m0"
title: "CircuitBrains Basic Download"
name: "CircuitBrains Basic"
manufacturer: "Null Byte Labs LLC"
board_url:
 - "https://github.com/neubauek/CircuitBrains"
board_image: "circuitbrains_basic.jpg"
date_added: 2020-02-27
family: atmel-samd
bootloader_id: circuitbrains_basic_m0
downloads_display: true
blinka: false
download_instructions: ""
features:
  - Castellated Pads
---

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.

**NOTE:** This board does not have a USB connector for the native USB. Native USB is broken out on the header/castellations and therefore requires a non-standard USB connection such as mounting to a motherboard PCB.

## 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

## Purchase

* [CircuitBrains Basic Project Page](https://kevinneubauer.com/portfolio/circuitbrains-basic/)
* [Kevin Neubauer Twitter](https://twitter.com/kevinneubauer)

## Learn more

* [GitHub](https://github.com/neubauek/CircuitBrains)