8‑Channel 12V Relay Module

A Relay is a dig­i­tal switch to con­trol much high­er volt­ages and cur­rents than your nor­mal Arduino boards does. When inputs a log­ic volt­age, the relay will switch to allow cur­rent to flow or cut­off, depend­ing on your wiring. A Relay usu­al­ly con­sists of a coil, 1 com­mon ter­mi­nal, 1 nor­mal­ly closed ter­mi­nal and one nor­mal­ly open ter­mi­nal. When the coil is ener­gized, the com­mon ter­mi­nal and the nor­mal­ly open ter­mi­nal will have con­ti­nu­ity.Why do we want to use a relay and do we real­ly need to? Any­time you want to switch on/off a device which draws more cur­rent or works with a high volt­age, you’ll need to use a relay, such as con­trol­ling of head­lights, park­ing lights, horns, etc.SpecificationCon­trol Volt­age: 12V DCMax Con­trol Capacity:10A@250VAC or 10A@30VDCDownload8‑Channel Relay Schemat­ic