eBay
A really useful relay module, triggered by 3.3V or 5V with a built in optocoupler. VCC: 5v or 3.3v positive. CH1: 5v or 3.3v data. Data sheets for the main components are readily available from the web.
eBay
DC 3V/3.3V Relay High Level Driver Module Single Isolated Drive Control Board.
eBay
1 VCC external 3V. Power indicator (green), relay status indicator (red). 1 x Relay module. Also note that monitor settings may vary from computer to computer and may distort actual colors. hope you could understand.
eBay
Mini PCB mounted single pole changeover relays.
eBay
Sub Mini PCB mounted double pole changeover relays. 21mm x 12.2mm x 9.9mm (L x H x W).
eBay
Operating voltage is DC 3v. .
eBay
Arduino Compatible: This relay module is designed to work seamlessly with Arduino, providing a convenient solution for your DIY projects. 1/5pcs 1-Channel Relay Module. Easy Installation: The crimp connector type allows for easy and secure connection to your circuit.
eBay