LSR Light Sensitive Sensor Relay Photosensitive Optical Relay Module 5V For Arduino DIY buy it!
$0.86-$1.06
Shield Module KEYESTUDIO Dual 5v 2 Channel Relay Shield Board Module For Arduino For Microbit buy it!
$1.52-$2.42
12V 1 Channel Relay Module Board Shield with Optocoupler Road High and Low Level Trigger Relay for Arduino buy it!
$0.49-$0.65
Chengsuchuang 8 Channel Relay 12V with Optocoupler Isolation Relay Module For Arduino buy it!
$2.50-$3.00
LILYGO TTGO T-SimHat CAN RS485 Relay 5V With Optocoupler Isolation Module T-SIM Series Expansion Development Board For Arduino
$5.00-$12.00