# 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. **43 device listed.** ## DezKVM Go Open-source KVM-over-USB device for controlling headless computers from your laptop. Features HDMI capture up to 1080p 25fps, virtual keyboard/mouse via USB HID, and a browser-based interface requiring no drivers. [Details](https://openhardware.directory/devices/dezkvm-go) | [Markdown](https://openhardware.directory/devices/dezkvm-go/md) ## TP4056 Charge Controller Module Li-Ion/LiPo battery charging module based on the TP4056 IC with built-in battery protection circuit. Mini USB 5V input, 1A charging current. Essential for portable and battery-powered IoT projects. [Details](https://openhardware.directory/devices/tp4056-charge-controller) | [Markdown](https://openhardware.directory/devices/tp4056-charge-controller/md) ## SLAMTEC RPLiDAR A1 360-degree 2D laser scanner with 12m range and 8000 samples per second. Widely used for ROS robotics, SLAM mapping, and autonomous navigation applications. [Details](https://openhardware.directory/devices/slamtec-rplidar-a1) | [Markdown](https://openhardware.directory/devices/slamtec-rplidar-a1/md) ## WS2812B RGB LED Ring (12-Bit, 50mm) 12-LED addressable WS2812B RGB ring in a 50mm form factor, running on 5V with single-wire data control — perfect for status indicators, wearables, and visual effects. [Details](https://openhardware.directory/devices/ws2812b-rgb-led-ring) | [Markdown](https://openhardware.directory/devices/ws2812b-rgb-led-ring/md) ## AVR-HF ADX-MI3 Pre-built digital mode QRP transceiver for amateur radio, supporting FT8, FT4, JS8, and WSPR on HF bands from 160m to 6m with ~5W output, OLED display, and single USB-C cable operation. [Details](https://openhardware.directory/devices/avr-hf-adx-mi3) | [Markdown](https://openhardware.directory/devices/avr-hf-adx-mi3/md) ## DFRobot Beetle CM-32U4 Ultra-compact Arduino Leonardo-compatible microcontroller board with ATmega32U4, integrated lithium battery charging, and native USB in a tiny 22x20.5mm form factor. [Details](https://openhardware.directory/devices/dfrobot-beetle-cm-32u4) | [Markdown](https://openhardware.directory/devices/dfrobot-beetle-cm-32u4/md) ## DFRobot Beetle BLE Ultra-compact Arduino Uno-compatible board with BLE 4.0 (CC2540), ATmega328P, sewable gold-plated I/O pads, and wireless programming in a 28.8x33.1mm wearable form factor. [Details](https://openhardware.directory/devices/dfrobot-beetle-ble) | [Markdown](https://openhardware.directory/devices/dfrobot-beetle-ble/md) ## DFRobot W5500 Ethernet PoE Board Arduino Leonardo-compatible IoT board with WIZnet W5500 hardwired TCP/IP Ethernet (10/100Mbps), 802.3af PoE power input, ATmega32u4 MCU, 20 digital I/O pins, and 6 analog inputs for wired IoT applications. [Details](https://openhardware.directory/devices/dfrobot-w5500-ethernet-poe) | [Markdown](https://openhardware.directory/devices/dfrobot-w5500-ethernet-poe/md) ## DFRobot Beetle Board The original coin-sized Arduino Leonardo-compatible board with ATmega32U4, native USB, 10 digital and 5 analog pins, and sewable gold-plated pads in a 20x22mm form factor. [Details](https://openhardware.directory/devices/dfrobot-beetle-board) | [Markdown](https://openhardware.directory/devices/dfrobot-beetle-board/md) ## DFRobot Xboard Relay Ethernet-controlled dual-relay board with ATmega32u4, WIZnet W5100 Ethernet, XBee socket, and two 10A relays for remote switching of AC/DC loads via web or MQTT, ideal for home automation. [Details](https://openhardware.directory/devices/dfrobot-xboard-relay) | [Markdown](https://openhardware.directory/devices/dfrobot-xboard-relay/md) ## Banana Pi M2 Pro Banana Pi M2 Pro is a compact SBC powered by the Amlogic S905X3 with 2GB DDR4, 16GB eMMC, WiFi 5, Bluetooth 5.0, three USB 3.0 ports, and USB-C power input. [Details](https://openhardware.directory/devices/bananapi-m2-pro) | [Markdown](https://openhardware.directory/devices/bananapi-m2-pro/md) ## Banana Pi M2+ Banana Pi M2+ is a compact SBC powered by the Allwinner H3 quad-core SoC with 1GB DDR3, 8GB eMMC, 802.11n WiFi, Bluetooth 4.0, four USB 2.0 ports, and micro-USB power. [Details](https://openhardware.directory/devices/bananapi-m2-plus) | [Markdown](https://openhardware.directory/devices/bananapi-m2-plus/md) ## Banana Pi M4 Zero Banana Pi M4 Zero is a compact Zero-form-factor SBC powered by the Rockchip RK3528 quad-core SoC with up to 4GB DDR4, 16GB eMMC, WiFi 5, Bluetooth 5.0, and USB-C power. [Details](https://openhardware.directory/devices/bananapi-m4-zero) | [Markdown](https://openhardware.directory/devices/bananapi-m4-zero/md) ## Adafruit METRO 328 Arduino UNO-compatible development board built around the ATmega328P at 16 MHz with 32KB flash, micro USB, and Adafruit's signature black PCB with gold-plated pads. [Details](https://openhardware.directory/devices/adafruit-metro-328) | [Markdown](https://openhardware.directory/devices/adafruit-metro-328/md) ## Arduino Mega 2560 R3 High-pin-count Arduino board based on the ATmega2560 at 16 MHz with 256KB flash, 54 digital I/O pins, 16 analog inputs, and 4 hardware UARTs for complex projects. [Details](https://openhardware.directory/devices/arduino-mega-2560-r3) | [Markdown](https://openhardware.directory/devices/arduino-mega-2560-r3/md) ## Seeeduino Cloud Arduino Yun-compatible board combining ATmega32u4 with a Dragino HE Linux WiFi module running OpenWRT. Features 802.11 b/g/n WiFi, Ethernet, 14 digital I/O pins, and USB host for IoT gateway applications. [Details](https://openhardware.directory/devices/seeeduino-cloud) | [Markdown](https://openhardware.directory/devices/seeeduino-cloud/md) ## Arduino Uno Ethernet Arduino UNO with built-in Ethernet and microSD slot based on the ATmega328P at 16 MHz — a self-contained board for networked Arduino projects without needing a separate Ethernet shield. [Details](https://openhardware.directory/devices/arduino-uno-ethernet) | [Markdown](https://openhardware.directory/devices/arduino-uno-ethernet/md) ## Arduino Leonardo Arduino board with ATmega32u4 featuring native USB — no separate USB chip needed — allowing it to emulate keyboards, mice, and joysticks while maintaining full Arduino IDE compatibility. [Details](https://openhardware.directory/devices/arduino-leonardo) | [Markdown](https://openhardware.directory/devices/arduino-leonardo/md) ## Arduino Micro Smallest official Arduino with native USB, based on ATmega32u4 at 16 MHz. Breadboard-friendly at 48×18mm with 20 I/O pins, 12 analog inputs, and USB HID/CDC emulation capability. [Details](https://openhardware.directory/devices/arduino-micro) | [Markdown](https://openhardware.directory/devices/arduino-micro/md) ## Arduino Yún Hybrid Arduino/Linux board combining ATmega32U4 with a MIPS-based Linux SoC, 802.11bgn WiFi, Ethernet, USB host, and microSD — enabling cloud-connected Arduino sketches and over-the-air programming. [Details](https://openhardware.directory/devices/arduino-yun) | [Markdown](https://openhardware.directory/devices/arduino-yun/md) ## Adafruit Trinket 5V Tiny 31×15mm Arduino-compatible microcontroller with ATtiny85 at 8–16 MHz, 5V logic, 8KB flash, 3 GPIO pins, and Micro USB — the 5V variant for interfacing with 5V sensors and NeoPixel LEDs. [Details](https://openhardware.directory/devices/adafruit-trinket-5v) | [Markdown](https://openhardware.directory/devices/adafruit-trinket-5v/md) ## Adafruit ItsyBitsy 32u4 5V 16MHz Ultra-compact 5V Arduino-compatible board with ATmega32u4 at 16MHz, native USB HID, 23 GPIO pins, 2KB RAM, 28KB flash, and Micro USB. Measures 35mm × 18mm — small form factor with full Arduino Leonardo capability. [Details](https://openhardware.directory/devices/adafruit-itsybitsy-32u4-5v) | [Markdown](https://openhardware.directory/devices/adafruit-itsybitsy-32u4-5v/md) ## Adafruit Pro Trinket 5V Compact ATmega328P-based Arduino-compatible board at 16 MHz, 5V, with 28KB flash, 18 GPIO, Micro USB, FTDI header, and mounting holes — a miniaturized UNO with battery-friendly power management. [Details](https://openhardware.directory/devices/adafruit-pro-trinket-5v) | [Markdown](https://openhardware.directory/devices/adafruit-pro-trinket-5v/md) ## Adafruit Metro Mini 328 V2 Breadboard-friendly ATmega328P Arduino-compatible board at 16 MHz, 5V, with USB-C, STEMMA QT I2C port, 32KB flash, and CP2102N USB-serial chip — a compact modern drop-in for the Arduino UNO. [Details](https://openhardware.directory/devices/adafruit-metro-mini-328) | [Markdown](https://openhardware.directory/devices/adafruit-metro-mini-328/md) ## Arduino UNO Mini Limited Edition Miniaturised collector's Arduino UNO with ATmega328P at 16 MHz in a 34.2 × 26.7 mm form factor with USB-C, individually numbered and signed by Arduino's founders. [Details](https://openhardware.directory/devices/arduino-uno-mini-limited-edition) | [Markdown](https://openhardware.directory/devices/arduino-uno-mini-limited-edition/md) ## Raspberry Pi Zero v1.3 Ultra-compact $10 single-board Linux computer with BCM2835 ARM at 1 GHz, 512MB RAM, micro SD, mini HDMI, two micro USB ports, and camera connector — the original Raspberry Pi Zero with camera support added in v1.3. [Details](https://openhardware.directory/devices/raspberry-pi-zero-v1-3) | [Markdown](https://openhardware.directory/devices/raspberry-pi-zero-v1-3/md) ## Arduino Uno R3 The quintessential beginner microcontroller board with ATmega328P @ 16MHz, 32KB Flash, 2KB SRAM, 14 digital I/O, 6 analog inputs, USB-B for programming, DC barrel jack, and the R3 expanded shield header. Open-source hardware. [Details](https://openhardware.directory/devices/arduino-uno-r3) | [Markdown](https://openhardware.directory/devices/arduino-uno-r3/md) ## DC Boarduino The DC Boarduino is a slim, breadboard-friendly Arduino-compatible development board based on the ATmega328 at 16MHz, with a 2.1mm DC barrel jack for 7–17V input, USB-TTL serial header, ICSP programming port, and a form factor optimized for direct breadboard insertion. [Details](https://openhardware.directory/devices/dc-boarduino) | [Markdown](https://openhardware.directory/devices/dc-boarduino/md) ## Arduino Mega ADK The Arduino Mega R3 ADK is an ATmega2560-based development board with 54 digital I/O, 16 analog inputs, 4 hardware UARTs, and a USB Type-A host port (Android ADK) with a power boost converter — designed for interfacing with Android smartphones as a USB host for accessory development. [Details](https://openhardware.directory/devices/arduino-mega-adk) | [Markdown](https://openhardware.directory/devices/arduino-mega-adk/md) ## Heltec HT-M7603 Indoor LoRa Gateway Cost-effective 8-channel indoor LoRaWAN gateway based on MT7628 + SX1303/SX1250, supporting WiFi and Ethernet uplink with web-based configuration for TTN, ChirpStack, and custom MQTT servers. [Details](https://openhardware.directory/devices/heltec-ht-m7603) | [Markdown](https://openhardware.directory/devices/heltec-ht-m7603/md) ## Heltec HT-H7608 V2 WiFi HaLow (802.11ah) router and IoT gateway with 2.4GHz dual-band, up to 1km+ range, mesh networking, Ethernet, and OpenWrt-compatible MT7628 SoC. [Details](https://openhardware.directory/devices/heltec-ht-h7608) | [Markdown](https://openhardware.directory/devices/heltec-ht-h7608/md) ## Arduino UNO R4 WiFi Arduino's flagship UNO board upgraded with Renesas RA4M1 ARM Cortex-M4F at 48MHz, ESP32-S3 WiFi/BLE 5.0, built-in 12×8 LED matrix, 12-bit DAC, CAN bus, op-amp, and Qwiic connector — all in the classic UNO form factor at 5V. [Details](https://openhardware.directory/devices/arduino-uno-r4-wifi) | [Markdown](https://openhardware.directory/devices/arduino-uno-r4-wifi/md) ## Arduino UNO R4 Minima The affordable entry to Arduino's R4 generation — Renesas RA4M1 ARM Cortex-M4F at 48MHz with 256KB flash, 32KB SRAM, 12-bit DAC, CAN bus, op-amp, and USB-C in the classic UNO form factor at 5V. No wireless, pure microcontroller power. [Details](https://openhardware.directory/devices/arduino-uno-r4-minima) | [Markdown](https://openhardware.directory/devices/arduino-uno-r4-minima/md) ## Arduino Nano Every Compact 45×18mm Arduino Nano with ATMega4809 at 20MHz — 48KB flash, 6KB SRAM, 5V logic, 14 digital I/O (5 PWM), 8 analog inputs, and USB-C. A modern, affordable 8-bit board for embedded projects and breadboard prototyping. [Details](https://openhardware.directory/devices/arduino-nano-every) | [Markdown](https://openhardware.directory/devices/arduino-nano-every/md) ## Arduino Nano R4 The newest Arduino Nano — Renesas RA4M1 ARM Cortex-M4F at 48MHz with 256KB flash, 32KB SRAM, Qwiic connector, RGB LED, castellated pins, and USB-C in an ultra-compact 43×17mm form factor. No wireless, pure embedded power. [Details](https://openhardware.directory/devices/arduino-nano-r4) | [Markdown](https://openhardware.directory/devices/arduino-nano-r4/md) ## Arduino UNO Q Arduino's first Linux-capable UNO — Qualcomm Dragonwing QRB2210 quad-core Cortex-A53 + STM32U585 real-time co-processor, 2GB/4GB RAM, 16GB eMMC, WiFi 5, Bluetooth 5.1, 8×13 LED matrix, USB-C, and AI-ready with Arduino App Lab in the classic UNO form factor. [Details](https://openhardware.directory/devices/arduino-uno-q) | [Markdown](https://openhardware.directory/devices/arduino-uno-q/md) ## Arduino Uno Rev3 The original Arduino UNO — the world's most popular development board with ATmega328P at 16MHz, 32KB flash, 2KB SRAM, 14 digital I/O (6 PWM), 6 analog inputs, USB-B, and 5V operation. The gateway to electronics and programming for millions. [Details](https://openhardware.directory/devices/arduino-uno-rev3) | [Markdown](https://openhardware.directory/devices/arduino-uno-rev3/md) ## Arduino Nano The classic breadboard-friendly Arduino — ATmega328P at 16MHz, 32KB flash, 2KB SRAM, 14 digital I/O (6 PWM), 8 analog inputs, Mini-B USB, and 5V operation in a tiny 45×18mm form factor. The compact original. [Details](https://openhardware.directory/devices/arduino-nano) | [Markdown](https://openhardware.directory/devices/arduino-nano/md) ## BIQU RGBDuino UNO V1.2 Arduino UNO-compatible development board based on ATmega328P-AU at 16MHz/5V, featuring RGB LED indicators. Available in Geek Duck (V1.1) and Jenny (V1.2) variants for maker and education projects. [Details](https://openhardware.directory/devices/biqu-rgbduino-uno-v1-2) | [Markdown](https://openhardware.directory/devices/biqu-rgbduino-uno-v1-2/md) ## BigTreeTech MicroProbe V2.0 Compact automatic bed leveling probe for 3D printers including Ender-3, B1, and H2 extruder platforms. Supports Voron Stealthburner, EVA, and other popular toolhead mounts. Open source hardware. [Details](https://openhardware.directory/devices/bigtreetech-microprobe-v2-0) | [Markdown](https://openhardware.directory/devices/bigtreetech-microprobe-v2-0/md) ## BigTreeTech SKSM V1.0 Supercapacitor Power Module Supercapacitor-based power loss recovery module for Klipper 3D printers. Provides ~13 seconds of 5W backup power via dual 2.7V 20F supercaps, enabling safe shutdown on power failure. [Details](https://openhardware.directory/devices/bigtreetech-sksm-v1-0-supercapacitor-power-module) | [Markdown](https://openhardware.directory/devices/bigtreetech-sksm-v1-0-supercapacitor-power-module/md) ## BigTreeTech K-Hub V1.0 4-port USB 2.0 hub for Klipper-based 3D printers with dual 24V/5V power input support. Expands a single USB host port to connect multiple peripherals like ADXL345, EBB boards, and cameras simultaneously. [Details](https://openhardware.directory/devices/bigtreetech-k-hub-v1-0) | [Markdown](https://openhardware.directory/devices/bigtreetech-k-hub-v1-0/md) ## BIQU AJAX TD1S Filament Transmission Distance (TD) and HEX color measurement tool for 3D printing. Captures true filament color and TD values for HueForge integration to build accurate filament libraries and fix color shifts in multi-color prints. [Details](https://openhardware.directory/devices/biqu-ajax-td1s) | [Markdown](https://openhardware.directory/devices/biqu-ajax-td1s/md)