1 Channel 5V Relay Module has 4 PINS instead of 3

1 Channel 5V Relay Module with Optocoupler .

Purchased from Website 1 Channel 5V Relay Module buy online at Low Price in India - ElectronicsComp.com

1 Channel 5V Relay Module with Optocoupler Model:- EC-0977

Relay Module has 4 PINS i.e. V+, G1, G2, IN. Anyone got any idea how to wire this up ?

Attached pic of Relay

Please let me know if you need any other information .

Thank You

V+ to 5V
G1 & G2 to GND
IN to GPIO pin

Sorry no picture. The fourth lead is probably a seperate power source for the relay. The picture on the web site shows three pins as you indicate.

An opto coupler on a 3-pin relay board is like tits on a bull.

A module with opto coupler MUST have four pins if the opto coupler is to be used.
VCC/GND for the relay coil (separate supply), and IN/GND for the opto LED.

If you don’t need opto isolation, then ground the two ground pins to Arduino ground.
Leo…