can this be powered by a car battery? What I need is a loud horn or siren to go off if someone comes through a door. There is no power in this buildi
225362
can this be powered by a car battery? YES (car battery 12V VDC) Supply Voltage 12~240VDC or 24~240VAC What I need is a loud horn or siren to go off if someone comes through a door Switching Capacity 250VAC/1A, 30VDC/2A Relay Output with 12 V max 2A = 24 Watts
225363
The unit can be powered with 12vDC and will draw 20mA idle and 40 mA while active. So, yes this device's relay can activate the horn or whatever when the beam is broken. You'll need something attached to handle the current of the signal device and time the sound. Without that a Quick walk through the beam and just a beep or if they stand in the beam it will sound until they move out of the way.
225364
Yes it is actually very forgiving as far as power is concerned... a 12 volt battery should work just fine... the unit is very simple to wire... I use it with a small strobe light
225365
can this be powered by a car battery? YES (car battery 12V VDC) Supply Voltage 12~240VDC or 24~240VACWhat I need is a loud horn or siren to go off if someone comes through a door Switching Capacity 250VAC/1A, 30VDC/2A Relay Output with 12 V max 2A = 24 Watts
423489
Most any 12 volt transformer will do the trick. These sirens don't require many amps to operate to capacity. I'm sure Radio Shack could fix you right up or any alarm supplier.
1297053
What power supply are you using to connect them to when testing? You would need a car battery. A 12V wall adapter will NOT have 10 amp output to be able to drive these horns. Most 12v home sources only have 1/2 amp out put you need a FULL 10AMPS. Hope that helps.
2153978
The units comes with an alarm, which I believe is powered by straight 12V, but it is not a speaker. Audio speakers have specific impedance and voltage limits. I wouldn't risk damage to a vehicle audio system by wiring the alarm's 12v supply direct to your car's speakers. The alarm is quite loud by itself. You'll hear it. Put it this way, if you are listening to speakers or headphones so loudly, that you cant hear this alarm, you're a hazard to yourself and others on the road.
731317
Most alram systems have a 12volt DC output for the siren or in your case the horns. Send that postive voltage wire to the plus terminal and the negative terminal gets connected to ground.ED
2152884
If your battery is old I would say no. Can you run the alarm without the battery? If you can and it has problems than I would say replace the transformer.I am using mine for a doorbell so I can't say with certainty.
1591080
This is just a siren, not an alarm system. When power is applied, it makes a loud noise. And when no power is applied, it is silent.
660072
You can power it from an outlet, however the alarm bell will sound continuously. You will need to wire in a switch of some sort to avoid this.
2102391
I'm sorry but I don't have any idea if there is enough power. I have never used it but keep it in the trunk of my Camry for an emergency. And, I keep my fingers crossed!
1142161
If it sounds, anyone can turn it off. Not sure what purpose it would serve when you are not present. The battery probably would not last several hours.
2083712
i made a circuit with a limit switch, a 12v timer relay, and this siren. It all operates off 12v. I got a selectable power supply from wally world that plugs into the wall. the siren would actually operate off less voltage but for the sake of the total circuit, 12v was best.
2090507
It has two types of siren's, a warble and a constant. They operate off of 12volts so as long as your sensor will put out the 12v's it will soundthe siren. I've had customers apply this to entry doors for instance so they can here when someone comes in their shop or yard's.
1620590
It's loud, and you need to put the speaker outside the car.. Behind the grill of example so you can hear it better.. No wires and no amps.. It comes with everything you need to conect the alarm
1292685
This is just a 100 Watt speaker. You will need to purchase the siren separately.
53322
Although I personally haven't done it, I've seen people use large emergency car battery chargers to power flashes. They're basically a deep cycle 12 volt car battery with an 120 VAC inverter (they usually come with jumper cables, a light, and sometimes an air pump). The bigger ones can power 2-3 lights for quite some time. Depending on your power needs you could probably make it through a photoshoot with a couple of those. They run about $120...and WAY WAY quieter than a generator.
46280
This is direct connected to your ignition switch or vehicle alarm. It is not battery operated.
1486752
Probably but not if you crank it up much. This is for a steady draw from light bulbs. The only way to steadily power a car stereo is with a high amperage power supply. The easiest method is what I do in my golf cart. I have a marine deep cycle battery that runs the radio, then when I am done, I put it on charge overnight. For longer periods to keep the battery charged up I have a float charger. Yes this is a hassle but car stereos draw a lot of power at only 12-14v so they need a lot of amperage to crank them up. Easiest thing is to get a good sized (it should weigh a few pounds minimum) power supply. A battery charger alone will buzz like crazy and not be good for the constant amp draw.