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A development board using the STM32L052K8U3, optimized for low-power use. Its form factor matches the Adafruit Feather series.

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Æther L052

A development board using the STM32L052K8Ux, optimized for low-power use. Its form factor matches the Adafruit Feather series.

Aether L052

Schematic

Aether L052
Click to see the full-size PDF

Specifications

Microcontroller

Name STM32L052K8Ux
Core ARM Cortex M0+
Flash Size 64 kB
RAM Size 8 kB
Clock Frequency 32 MHz
Peripherals USB, SPI, I2C, UART
External Crystal None

STM32L052K8U6 = –40 to 85 °C
STM32L052K8U7 = –40 to 105 °C
STM32L052K8U3 = –40 to 125 °C

Voltage Regulator

Name MCP1711T-33I/OT
Output Voltage 3.3 V
Output Current 150 mA
Quiescent Current 600 nA

Lithium Battery Charger

Name MCP73832T-2ACI/OT
Charge Current 100 mA (set using R4)
Charge State Available through PB8

Why it exists?

There was no entry-level development board for the STM32L052 series, especially for the compact STM32L052K8Ux variant.

Where to get it?

Æther L052 is open source and not sold in shops. You can build your own; all required files are in the pcb folder. If you are a manufacturer, you may reuse the design under the License, or contact me first if you prefer.

Code examples

Look at the Æther L052 Examples repository.

License

CERN-OHL-P-2.0 license

About

A development board using the STM32L052K8U3, optimized for low-power use. Its form factor matches the Adafruit Feather series.

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