<![CDATA[2Relay pin out?]]>Hi Guys, just got my 2Relays just wandering what is pin c on the relay . Why and how to use it. Dave

]]>https://community.m5stack.com/topic/3805/2relay-pin-outRSS for NodeFri, 01 May 2026 14:31:24 GMTMon, 06 Dec 2021 09:28:29 GMT60<![CDATA[Reply to 2Relay pin out? on Mon, 06 Dec 2021 10:30:27 GMT]]>@felmue Thanks

]]>https://community.m5stack.com/post/15732https://community.m5stack.com/post/15732Mon, 06 Dec 2021 10:30:27 GMT<![CDATA[Reply to 2Relay pin out? on Mon, 06 Dec 2021 09:42:12 GMT]]>Hello @Devan

I'd say using the C pin is optional. From the drawing you can see that the two C pins are just connected to each other internally. So to connect and switch a load you have two options:

  • use both C pins: connect pin A and C to your power source and connect B and C to your load.
  • do not use C pins: connect one wire of your power source to pin A, connect one wire of your load to pin B and use a direct connection from your power source to your load for the return wire.

Thanks
Felix

]]>https://community.m5stack.com/post/15731https://community.m5stack.com/post/15731Mon, 06 Dec 2021 09:42:12 GMT