Advice Using Arduino's to power relays

lytnin

Full time elf
Joined
Jul 26, 2010
Messages
117
Location
North Richmond NSW
For multiple sets of lights using a common power supply, wire it like this.
 

Attachments

  • Lishfish relay example3.jpg
    Lishfish relay example3.jpg
    175.4 KB · Views: 17

lytnin

Full time elf
Joined
Jul 26, 2010
Messages
117
Location
North Richmond NSW
I would imagine the three wires would be different.


The above would only work for the 2 wire lights that alternate polarity to change channels.


Someone else would have to guide you with Arduino.
 

battle79

Full time elf
Joined
Dec 8, 2012
Messages
465
Location
Chirnside Park, Victoria, AU
3 wire lights have one common positive wire and two negatives, one for each half of the lights.


Just hook the positive from the lights up to the PSU and hook the negative up to the relays NO contact and the negative from the PSU up to the common terminal on the relay.


Only tricky part is figuring out which wire is which. Trial and error works well for this, apply the power for a second or two to two of the wires, if they light up normally than you have a known positive and the negative for one half of the lights, just quickly test the other half to prove and confirm.


Cheers,
 

Lishfish

Full time elf
Joined
Dec 26, 2016
Messages
160
Location
Adelaide
battle79 said:
3 wire lights have one common positive wire and two negatives, one for each half of the lights.


Just hook the positive from the lights up to the PSU and hook the negative up to the relays NO contact and the negative from the PSU up to the common terminal on the relay.


Only tricky part is figuring out which wire is which. Trial and error works well for this, apply the power for a second or two to two of the wires, if they light up normally than you have a known positive and the negative for one half of the lights, just quickly test the other half to prove and confirm.


Cheers,


Thank you
 
Top