Download 2 Relay Module Schematic Background

2 relays are included in this module, with nc ports means normally connected to com and no ports means normally open to com.

Download 2 Relay Module Schematic Background. Note that i am passing a0, a1 as integers. Whenever a relay is activated, the respective led will light up.

Relay Module 2 relays, 5V
Relay Module 2 relays, 5V from opencircuit.shop
How to interface relay module with arduino? Dual relay module with arduino optocpuplers interface. The two relays are dimensioned in the top of the sketch:

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Note that i am passing a0, a1 as integers. Note that i am passing a0, a1 as integers. This module should be powered with 5v, which is assemble all the parts as shown in the schematic diagram. Each relay has a normally open (no) and a normally closed (nc) the following schematic shows how to connect the module to an arduino, i have only shown one device (lightbulb) connected to one relay.