32 Channel USB Relay Module - module with 32 24V relays and USB interface

Module with 8 relays and 8 IO pins and 8 analog inputs. It communicates via the RS485 or USB interface and supports the Modbus RTU protocol. Numato Lab NLRE1001-A

Module with two 240V/2A relays controlled by 5V with a fuse triggered by a high state. modSSR-2CH-H

8-channel PoE module with relays allowing you to connect your PC to other electronic circuits via the network. It does not need a separate cable for power and data transmission. It can be controlled via a simple web interface or Telnet. Numato Lab NLRP1001-A

The module offers 16 TTL-compatible GPIOs, 10 analog channels and individual I/O configuration, making it ideal for automation, DIY projects and advanced system engineering, with the possibility of remote control via standard network interfaces. Numato Lab NLETHGC016-HA

Industrial relay module controlled via RS485 interface with Modbus RTU protocol support, offering 8 outputs with maximum load of 10 A. Equipped with galvanic isolation, opto-isolation, TVS diodes and DIN mounting, it ensures safe and reliable operation in harsh industrial conditions. Thanks to functions such as flash-on/off, configurable RS485 address (1-255), signaling diodes and wide power supply range (7-36 V), the module is perfect for building automation and device control. Waveshare Modbus RTU Relay (B)

The module with 4 relays is designed to work with Arduino. It allows you to control devices with operating parameters up to 250VAC/7A or 30VDC/10A. Seeed Studio 103030009

The module with the relay is designed for the M5Stack sets. It allows you to control devices with a working voltage of up to 220 V AC and a current of up to 3 A or a voltage of 30 V DC and an intensity of 3 A. M5Stack U023

Module with a 12 V relay and a timer. It enables the implementation of delayed switching on or off of the circuit with the possibility of time adjustment

The module with the HLS8-T73 relay with a load up to 5 A. The board is equipped with a Grove connector and is controlled by a digital input. Seeed Studio 103020005

This industrial relay module, powered by the Raspberry Pi RP2350B microcontroller, features six 10A 250VAC/30VDC relays and an isolated RS485 interface. It ensures safe and stable operation thanks to opto-isolation, power isolation, and surge protection. It supports programming in C/C++, MicroPython, and the Arduino IDE, and the 40-pin Pico HAT connector allows for easy expansion. Its robust DIN housing and 7–36V DC power supply make it ideal for industrial automation and IoT projects. Waveshare RP2350-Relay-6CH

Extension module compatible with Raspberry Pi. The board is equipped with three 24 V 2 A relays, three buffer inputs, three sink outputs and three analog inputs with a working range up to 24 V. Pimoroni PIM213

Module with 2 5 V relays with a maximum switching current of 2 A. It communicates via the USB interface and does not require an additional power supply. Numato Lab USBPOWRL001

Module with a 12 V relay and a timer. It allows you to turn the device on and off cyclically at a specified time using potentiometers. It can also operate in single trigger mode, which allows the device to be turned on after a signal has been applied for a specified period of time. The operating time can be adjusted from 1 s to 100 s or from 1 s to 15 min

Module with 2 relays controlled by the I2C interface. Each relay can switch currents up to 25 A at 12 to 280 V AC. SparkFun COM-16810

Module with 4 relays SRD-05VDC-SL-C with a load up to 10 A. The board was equipped with a Grove connector and communicates via I2C. Seeed Studio 103020133

A versatile module that allows you to control higher voltage devices such as 12V LED strips while simultaneously powering a microcontroller from 3.3V. The module integrates an LMR14203 converter and an N-channel MOSFET (PSMN7R0-100BS), allowing you to power the board at up to 12V and drive loads up to 10A, with additional protection features and LED indicators, making it ideal for projects requiring efficient power control. SparkFun COM-23979