Light Controller Using 8051

[bobdxcool]

i am doing a project on room light controller using 8051..
i am using a pcb relay for controlling the light..
i have a doubt regarding the relay pins....





i have a doubt regarding which are the coil terminals and which terminals are nc ,no and common!!

i am posting a picture of it! pls help!!

 

[jackorocko]

Try the datasheet

 

[bobdxcool]

Try the datasheet

sir there is no datasheet available on the net for this company...
is there any other procedure using multimeter to check??

 

[jackorocko]

well I can't see the markings on the relay in the picture or else I would try to search for you.

 

[bobdxcool]

well I can't see the markings on the relay in the picture or else I would try to search for you.

the specifications written on it are:
7a/240vac
7a/24vdc
coil:12vdc

company's name written on it is tahud
cube fp

her's another pic..pls open the pic in a new window and see!!

 

[duke37]

I am not sure but it looks like there might be 5 pins on the relay.

With a resistance meter find two pins with a resistance of say 100 ohms. That is the coil, connect these pins to 12V (9V may do) and listen for the click.

The other three pins are the contacts. Two pins will be connected together and may be marked NC (normally closed) and common.
When the relay is energised, there should be a connection between common and NO (normally open)