Installing a 12 Volt Unit Using 110 Volt Current

I have," unit showing 5 pins, 85, 86 , 87, 87 and 30. What makes you think that "85, 86 , 87, 87 and 30" would mean any more to us that it does to you, without some manufacturer's information and a schematic. See Below↓ What's with the 2, 87's?

STOP! DO NOT ATTEMPT TO DO THIS!!!!!!!

YOU MIGHT WAKE UP PERMANENTLY DEAD!!!!!!

You need some way to convert the 120vac input power down to 12 vdc.

A 12 V RELAY WILL NOT WORK HERE.

You need a 12v power supply, not a relay.

GET HELP, NOW!

Thank you so much for the warning......however, this is what the 'moron' at our local electronic store told me......now for the real world......

Is the 12v power supply a unit that converts to 12 volts and can it be purchased as a single unit or does it need to be built?

Again, thanx so much for the warning...

Go back to the <...moron...>, and complain to his/her supervisor. Point out to the supervisor that this individual knows about as much about electronics as the customer, and go from there.

Probably none of the above.

Geeez... Just buy a 12 volt adapter. You can find them in a variety of wattages. Here's one for $11 that is rated for 72 watts:

http://www.amazon.com/Kinamax-AD-LCD12-Monitors-Adapter-Supply/dp/B000VE7GQQ/ref=sr_1_4?s=electronics&ie=UTF8&qid=1356983382&sr=1-4&keywords=12+volt+power+adapter

None of the above. A 12 V relay means the coil requires 12 volts, but AC or DC? The same for your horn. First you will need an instrument transformer to bring the 110 AC supply down to 12 V and then possibly a rectifier to convert the 12 volt AC to DC and rated for the current requirements of your horn.

I'll ask the stupid question, why do you need to install a horn on your home anyways? Do people pull out in front of it?

If the horn was made for a house, it would be 120v AC or come with a power adapter, right?

I live in Canada and in winter we can install a removable carport (called a tempo). I have installed a motion sensor to turn on the lights when someone enters underneath the tempo, now I would like to install a horn ( small siren) so I would know if someone is going into the tempo while we are asleep.....tp be used as a deterrent from trying to steal my car

In India we use a bugler alarm for our cars and other vehicles . The item is readily available with all dealers of car and car accessories. In case if any thief try to open the vehicle the alarm will shout . So better order one and fit in your vehicle.

I certainly wouldn't anyone blowing Reveille, Assembly, or Taps around my car!

Wouldn't it be easier to remove the rotor arm from inside the distributor cap, and keep it on the bedside table while asleep?

Maybe that is what I should have purchased in the first place.....I was told by the guy in the electronics store that they only come in 12 volts....

Ok, I understand but even so, the "moron" at the store should know you would need a power supply for it, houses are not wired with 12 VDC. I would go back to him and ask him how are you supposed to power this thing. Did he expect you to wire off your car, maybe?

Find an older moron at the store next time.

Seriously, this isn't difficult, at all.

A 120 vac power supply that plugs into the wall with 12 vdc output wired through a simple(doorbell) swith will do it. That makes it almost "plug and play".

My thought is that it should have been complete, or he should have been made aware of what he needed instead of selling him stuff and sending him on his marry way to wire it into 120 VAC. He did say he bought it from an electronics store.

THANK YOU everyone for the expedient reply....very much appreciated.....

and have a Happy New Year....

You too.

please film this

Fredski - what do you want me to film?

I just want you to be careful. You have to rectify your 12oAC to DC and transform it down to 12V, sounds like that might be a bit over your head, so just be careful

Sounds like there is potential for early retirement here. First take a hammer and smash stuff. Then blow into a paperbag until you hyperventilate and roll around in some dirt. The go into the store and tell them you did as you were told and it resulted in the death of the components and a shock to you. Then sue. You could also include burning down your house but I suspect the inconvenience will outweigh the financial return.

Note - I am not a lawyer

"Note - I am not a lawyer"

That's obvious.

Sounds like you also need to purchase 5 fuse holders and a supply of fuses. When these run out, go back and purchase book on basic electricity, and a multimeter, then you can determine common contact, normally open contact, normally closed contact, coil and coil resistance. This relay might be usable with a motion sensor to trigger your horn IF the contacts are current rated for your horn. Most motion sensors wire directly to the 110ac to turn on the light, a 110ac relay might be used here. Be aware that these modifications need to meet code or the fire damage won't be covered by insurance. Also be aware that these alarms going off on a regular basis at 2:30 am due to a prowling cat or dog tend to piss off the neighbors.

Take the horn back - this is not the way to go.

Your relay is for a car and not rated for household voltages.

Go back a stage instead of us looking at your solution tell us what you really want to achieve - what are you trying to do?

Likely there are some very straight forward and safe ways of hitting goal.

I wanted to put up a motion sensor to turn on a light in my driveway (hopefully as a deterrent.

They cannot steal my car because of a chip i the key....They broke into my wife's car and stole a few items in the back seat.

I didn't want this to happen again, so the detector. If something happens in the middle of the night when we are asleep, i would want a small horn or alarm to go off, to notify me that someone has gone into the driveway....

Getting a car alarm does not prevent someone from breaking inside to steal something...

There are mains powered floodlights available on the market. A movement in front of them will cause them to come on. Unfortunately these PIR devices cannot tell the difference between Bill the Burglar, a dog, cat or windy night. Do you really want an alarm sounding every time the light comes on.

From many of these lights you can take a switched mains supply. My suggestion is that you get an electrician to wire this to a relay in series with a second PIR sensor - this one without a light. This will massively reduce false alarms but you will still get a useful security light. The realy then switches a mains powered sounder - a yodalarm or similar.