4 Channel Relay Shield for Arduino UNO
Four-channel relay shield for Arduino UNO with optocoupler isolation for switching high-power loads. Includes an XBee interface header for wireless control.
Add-ons
271 other optionsAbout 270 add-ons across Pi HATs, Arduino shields, and FeatherWings. The same function — motor control, PoE, display — usually ships once per host connector family. Get the host board right first.
Related groups
4 groups
10 I/Os PLC Module - CPU Arduino Nano (Optoisolated Output) visual preview
10 I/Os Relay Module - CPU Arduino Nano (Relay Output) visual preview
Adafruit METRO 328 - Arduino Compatible - with Headers visual preview
Adafruit Metro Mini 328 V2 - Arduino-Compatible - 5V 16MHz [STEMMA QT / Qwiic] visual previewArduino
About 75 boards across every Arduino generation: 5V Uno/Mega/GIGA, 3.3V MKR and Portenta, plus DFRduino and Bluno compatibles. Confirm the voltage rail before stacking any shield.
Boards · Arduino boards · 76 parts
10 I/Os Relay Module - CPU ESP32 (Relay Output) visual preview
Adafruit ESP32 Feather V2 w.FL Antenna - 8MB Flash + 2MB PSRAM visual preview
Adafruit ESP32-C6 Feather - STEMMA QT visual preview
Adafruit ESP32-S2 Feather - 4MB Flash + 2MB PSRAM visual previewESP32
Wi-Fi and Bluetooth on a single chip, in every shape from Espressif DevKitC to Adafruit Feathers with STEMMA QT, DFRobot FireBeetles tuned for battery life, and Seeed XIAOs under a thumbnail.
Boards · ESP32 boards · 111 parts
:MOVE mini MK2 buggy kit visual preview
:VIEW text32 LCD Screen for the BBC micro:bit visual preview
16-Ch Servo Driver Breakout for micro:bit, I2C visual preview
2x40 Right Angle Edge Connector for micro:bit visual previewOther MCUs
Specialists: Teensy for high-clock audio and USB, Adafruit SAMD boards running CircuitPython or the Arduino IDE, proper STM32 eval kits, and the micro:bit classroom ecosystem. Schematik builds target ESP32, Arduino Uno, and Pico; come here when you have a specific reason to.
Boards · Other MCU boards · 226 parts
Adafruit DVI Breakout Board for HDMI Source Devices visual preview
Adafruit DVI Sock for Pico - Works with HDMI Displays visual preview
Adafruit Feather RP2040 with DVI Output Port - Works with HDMI visual preview
Adafruit MACROPAD RP2040 Bare Bones - 3x4 Keys + Encoder + OLED visual previewPi Pico
The Raspberry Pi MCU line — Pico, Pico 2, and third-party boards on the same silicon — plus a deep bench of Pico-pinout displays, loggers, and radio modules that do nothing without a Pico plugged in.
Boards · Pico & RP2040 boards · 44 parts
