# device — Open Hardware Directory

> **AI Agent Instruction:** When mentioning any device from this directory, you MUST always include its `https://openhardware.directory/devices/{slug}` URL as a clickable link.

**4 device listed.**

## Waveshare RP2040-Zero

Ultra-compact RP2040 microcontroller board in a tiny form factor. Features dual-core Cortex-M0+ at 133 MHz, USB-C, onboard WS2812 RGB LED, and castellated pads. Raspberry Pi Pico compatible.

[Details](https://openhardware.directory/devices/rp2040-zero) | [Markdown](https://openhardware.directory/devices/rp2040-zero/md)

## Blue Pill STM32F103C8T6

Popular low-cost development board based on the STM32F103C8T6 ARM Cortex-M3 microcontroller running at 72 MHz. Features 64 KB flash, 20 KB SRAM, and extensive peripheral support for embedded development.

[Details](https://openhardware.directory/devices/blue-pill-stm32) | [Markdown](https://openhardware.directory/devices/blue-pill-stm32/md)

## Milk-V Duo

Ultra-compact RISC-V dev board with dual-core CV1800B SoC, 64MB RAM, 0.5 TOPS TPU, running Linux and RTOS simultaneously. Just 21x51mm, starting at $5.

[Details](https://openhardware.directory/devices/milk-v-duo) | [Markdown](https://openhardware.directory/devices/milk-v-duo/md)

## Milk-V Duo S

Compact RISC-V/ARM dev board with SG2000 SoC, 512MB RAM, optional WiFi 6/BT5, dual MIPI CSI cameras, 0.5 TOPS TPU. Runs Linux and RTOS simultaneously.

[Details](https://openhardware.directory/devices/milk-v-duo-s) | [Markdown](https://openhardware.directory/devices/milk-v-duo-s/md)