Hi people,

Im not so sure on what type of relay it is used in this circuit diagram:

I have look on ebay but there are quite a few types of relays (dpdt) that are 12v

thanks in advanced

 

12VDC relays with 600 Ohm coils are common. The only thing we still don't know is voltage and current rating of the contacts. spec of the relay or device that is part of will reveal that.

 

12VDC relays with 600 Ohm coils are common. The only thing we still don't know is voltage and current rating of the contacts. spec of the relay or device that is part of will reveal that.

Im trying to build this circuit and currently I do not know what the relay should be. I have searched on ebay and found this:
http://www.ebay.co.uk/itm/RS-12-12V-DC-Relay-DPDT-2PDT-1A-24VDC-125VAC-2-Circuits-/200703591330?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2ebaddc3a2

 

they are just showing a typical 600 ohm coil, DPDT relay, the contact ratings all depend on what you are connecting to them, if you are connecting a motor, it should have enough current capabilities to handle the motor current draw, if you are just using it as a contact closure type of device, then any low current relay contacts may be sufficient..... so to better answer your question, what are you planning on connecting to that circuit once you have built it?

 

Im trying to build this circuit and currently I do not know what the relay should be. I have searched on ebay and found this:
http://www.ebay.co.uk/itm/RS-12-12V...al_Components_Supplies_ET&hash=item2ebaddc3a2

That will work for the circuit as long as the load you are switching is less than 1 amp @ 125 VAC or 2 amps @ 24 VDC. So the question is... What are you turning on/off with the circuit?

 

they are just showing a typical 600 ohm coil, DPDT relay, the contact ratings all depend on what you are connecting to them, if you are connecting a motor, it should have enough current capabilities to handle the motor current draw, if you are just using it as a contact closure type of device, then any low current relay contacts may be sufficient..... so to better answer your question, what are you planning on connecting to that circuit once you have built it?

I am just trying to build that circuit, the PIR sensor will allow the LED to switch on when movement is detected.
It does not need to be connected to other things.

this is the website:
http://electroschematics.com/6039/security-light-switch-with-pir-sensor/

 

That will work for the circuit as long as the load you are switching is less than 1 amp @ 125 VAC or 2 amps @ 24 VDC. So the question is... What are you turning on/off with the circuit?

It is just the LED

Because the PIR will detect movement and cause the LED to turn on

this is the website:
http://electroschematics.com/6039/security-light-switch-with-pir-sensor/

 

furthermore, the circuit shows a LED at the bottom right, that is what the replay will turn on. right?

 

1 set of contacts turns on the LED the other can connect to something else, the relay you found on ebay should work just fine.

 

I see that there is an LED connected to one of the relay contacts. The other set of contacts, labeld "SW OUT", on the relay is intended to be connected to something you want to control. That portion is the determining factor to the load capacity of the relay. If all you want to do is build the circuit just for the learning process, then the relay you found on ebay will work fine for you. The "code" you see in the listing is just a model # and some info about the relay being sold.

 

I see that there is an LED connected to one of the relay contacts. The other set of contacts, labeld "SW OUT", on the relay is intended to be connected to something you want to control. That portion is the determining factor to the load capacity of the relay. If all you want to do is build the circuit just for the learning process, then the relay you found on ebay will work fine for you. The "code" you see in the listing is just a model # and some info about the relay being sold.

would it be possible for me to connect a switch there? (in the 'sw out')

I want to connect multiple Super bright LEDs(about 4-8 LEDS) [more like a spot light]

how should i go ahead with that then? should I just add the LEDs on the circuit(where that single LED is) making it parallel or series?

and once again thanks people for the help

 

1 set of contacts turns on the LED the other can connect to something else, the relay you found on ebay should work just fine.

I want to connect multiple LEDs(4-8 super bright LEDs), would the circuit be able to withstand it?(or that relay found on ebay?)

the super bright LED I will be using will be:
http://www.ebay.co.uk/itm/110878499130?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

 

would it be possible for me to connect a switch there? (in the 'sw out')

Yes, though I do not know why you need to as the relay is essentially a switch.

I want to connect multiple Super bright LEDs(about 4-8 LEDS) [more like a spot light]

how should i go ahead with that then? should I just add the LEDs on the circuit(where that single LED is) making it parallel or series?

and once again thanks people for the help

It is fairly simple to do that. Just connect your power supply positive for the LEDs to the relay, one of the SW OUT pins, then connect your LEDs anode to the other relay contact labeled SW OUT. Connect as many LEDs in parallel or series, your choice but dependent upon the voltage supply you are using. Connect the cathode of the LEDs to your current limiting resistor(s) then to ground.

 

Yes, though I do not know why you need to as the relay is essentially a switch.



It is fairly simple to do that. Just connect your power supply positive for the LEDs to the relay, one of the SW OUT pins, then connect your LEDs anode to the other relay contact labeled SW OUT. Connect as many LEDs in parallel or series, your choice but dependent upon the voltage supply you are using. Connect the cathode of the LEDs to your current limiting resistor(s) then to ground.

So I just connect some LEDs at the 'SW out' section(two pins)? But how do I know which is the anode and which is the cathode?

thanks

 

Here are some visual guides for you.

 

Here are some visual guides for you.

Hi,

should I buy the relay then?(this one has 8 pins)
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=200703591330
would this one still work?


or should I try and find a relay that has 6 pins?

thanks in advanced

 

Yes that relay will work.

The pins you have labeled 1 & 8 are the coil. It doesn't matter which is positive and negative as long as the protection diode goes in like on your first schematic. Pins 2, 3, & 4 are one set of relay contacts. Pins 5, 6, &7 are the second set of contacts.

The schematic of the relay is just an easy to use representation of the internal components of the relay. It does not necessarily mean that is how the pins actually are.

 

Yes that relay will work.

The pins you have labeled 1 & 8 are the coil. It doesn't matter which is positive and negative as long as the protection diode goes in like on your first schematic. Pins 2, 3, & 4 are one set of relay contacts. Pins 5, 6, &7 are the second set of contacts.

The schematic of the relay is just an easy to use representation of the internal components of the relay. It does not necessarily mean that is how the pins actually are.

Now I am even more confused
on the left diagram, the pins that are connected(the bottom set on contacts) are pins 2 and 3?(compared the right diagram)

 

Do not get hung up on the pin numbers. You will find that when you order the relay you need or if you look at a datasheet of a relay, the pin numbers are really different than what you think they are.

Just look at the contacts as NO - C - NC, which is Normally Open - Common - Normally Closed. If you can identify them that way you will be in better shape.

 

thanks for the help, I just hope that when I connect everything up, the relay doesn't blow or something like that :|