Amazon.com: SainSmart 8-Channel 5V Solid State Relay Module Board for Arduino Uno Duemilanove MEGA2560 MEGA1280 ARM DSP PIC : Everything Else
BeMatik - Printed circuit with 1 relay via USB 5V. Controlled by a computer. Model DW-0054: Amazon.de: Business, Industry & Science
4 Channel Relay Module Board with Optocoupler High & Low Trigger Module 5V/12V/24V Optional(5V): Amazon.com: Industrial & Scientific
Amazon.com: 4 pcs DC 5V 1 Channel Relay Module Board Shield High/Low Level Trigger with Optocoupler : Industrial & Scientific
Electronics-Salon 2 SPDT 10Amp Power Relay Module, DC 5V Version.: Amazon.com: Industrial & Scientific
Amazon.com: AC100V-250V 30A High Power 2-Channel Relay DC5V High-Low Level Trigger Switch Module for Arduino : Electronics
Amazon.com: ELEGOO 4 Channel DC 5V Relay Module with Optocoupler Compatible with Arduino UNO R3 MEGA 2560 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics
Amazon.com: JBtek 4 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM : Electronics
Amazon.com: DAOKI 5 PCS 5v Relay Module for Arduino ARM PIC AVR MCU 5V Indicator Light LED 1 Channel Relay Module Works with Official Arduino Boards : Industrial & Scientific
OLatus optocoupler 8 channel 8-channel relay control panel PLC relay 5V module for arduino : Amazon.in: Industrial & Scientific
Amazon.com: ARCELI 5PCS KY-019 5V One Channel Relay Module Board Shield for PIC AVR DSP ARM for Relay : Electronics
Amazon.com: SunFounder 2 Channel DC 5V Relay Module with Optocoupler Low Level Trigger Expansion Board Compatible with Arduino R3 MEGA 2560 1280 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics
Amazon.com: ELEGOO 4 Channel DC 5V Relay Module with Optocoupler Compatible with Arduino UNO R3 MEGA 2560 DSP ARM PIC AVR STM32 Raspberry Pi : Electronics
Amazon.com: JBtek 8 Channel DC 5V Relay Module for Arduino Raspberry Pi DSP AVR PIC ARM : Electronics
Amazon.com: DAOKI 5 PCS 5v Relay Module for Arduino ARM PIC AVR MCU 5V Indicator Light LED 1 Channel Relay Module Works with Official Arduino Boards : Industrial & Scientific