STM32 ARM development board Ladybug STM32L432 - Elecrow

STM32 ARM development board Ladybug STM32L432 - Elecrow

Product information:

STM32L432: 32-bit microcontroller development board programmable via USB with the Arduino IDE.

Ladybug is a small, low-cost development board with simple, open-source design that will allow just about anyone to make use of the STM32L4 in their own custom applications. Ladybug relies on a single, inexpensive 32.768 kHz crystal oscillator and doesn't require the ST-Link built in to the STM32 Nucleo boards. Applications can be developed using the Ladybug development board, which provide access to all GPIOs and peripherals of the STM32L4. When the application has been sufficiently proved out, application-specific hardware can be designed using the STM32L432 development board as a design template. The 5 mm x 5 mm QFN32 package of the STM32L432 (Ladybug) is space-efficient, low-cost but a still powerful solutions to embedded computational and sensor management problems. Better still, the rich set of low-power modes allows very long battery life in remote and wearable applications.

Here is a github repository with example Arduino sketches and here is where you can find the Arduino core for the Ladybug.

We designed Ladybug for small LiPo battery operation. There is a port for a JST battery connector on the board as well as a Vin at the board edge that connects to the battery anode so peripherals like haptic motors or displays can be powered directly from the battery, or the board can be directly powered from Vin.

We chose the smallest form factors for the boards to enable use for wearable applications. Ladybug is smaller than most single-cell LiPo batteries!

We chose the TPS7A0233 200 mA 3V0 LDO because it has a quiescent current of only 65 nA. The STM32L432 Ladybug uses only 2.4 uA in STOP mode!

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