Problem with relay on siren output

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laz0r

Member - Posts: 4

Joined: March 06, 2004

Location: New Zealand

Posted: June 06, 2004 at 12:48 AM / IP Logged

I have hooked up a relay on my siren output, all works fine, the alarm can be armed and disarmed except for when the alarm is going off I can't seem to disarm it. So somehow the relay is stopping me from turning the alarm off. Any ideas on whats happening, or maybe something else easy to use instead of a relay?

Cheers

draasch

Gold - Posts: 2,172

Joined: February 07, 2003

Location: Florida, United States

Posted: June 06, 2004 at 9:51 AM / IP Logged

what unit are you working with.....why did you wire up a relay????

when you say siren, are you talking about the car horn or the siren that came with the alarm...

most alarms (here in the states) have a wire that you hook up right to the siren wire. no relay needed.

if the transmitter will not disarm when the alarm is in full alarm mode, it doesnt sound like the relay is the problem.....

how do you have the relay wired up and to what wires??

Good Luck

David

Ace Security

813-376-9778

Tampa

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laz0r

Member - Posts: 4

Joined: March 06, 2004

Location: New Zealand

Posted: June 06, 2004 at 6:18 PM / IP Logged

Its a Mongoose alarm.

I'm hooking up a relay cause i've bought a wireless doorbell to act as a pager. I needed the relay to activate the transmitter when the alarm goes off.

I have pins 87 and 30 hooked to the switch of the transmitter, pin 86 to ground and pin 85 hooked to the positive siren output.

CutDog504

Silver - Posts: 637

Joined: May 14, 2002

Location: Louisiana, United States

Posted: June 07, 2004 at 1:09 AM / IP Logged

Most likely you are getting too much rf interference from that pager thing you hooked up. I've done add on pagers many times and they all have these symptoms, VERY hard to disarm the alarm once that pager gets triggered. Most of them, you have to wait at least 8 to 10 seconds before you can disarm it, sometimes longer.

laz0r

Member - Posts: 4

Joined: March 06, 2004

Location: New Zealand

Posted: June 08, 2004 at 2:39 AM / IP Logged

That makes sense now, any ideas on how i can make it so the transmitter only goes on for a short amount of time, so the alarm can then be disarmed? Easily that is.

Teamrf

Gold - Posts: 1,031

Joined: January 13, 2004

Location: United States

Posted: June 08, 2004 at 10:34 PM / IP Logged

You really don't need relays unless you're doing multiple sirens.

~The Rookie~

Rookie of the year that is...

Don't let the smoke out of your equiptment..it doesn't go back in.

Teken

Gold - Posts: 1,492

Joined: August 04, 2002

Location: Aruba

Posted: June 09, 2004 at 5:10 PM / IP Logged

laz0r wrote:

That makes sense now, any ideas on how i can make it so the transmitter only goes on for a short amount of time, so the alarm can then be disarmed? Easily that is.

The maximum transmitting duration / time is limited to 60 seconds by the FCC. You would have to know exactly which component(s) configuration to alter the transmitting time.

In the old days the time was done via a drained capacitor, today the timing is done by a 555 timer.

For the 555 timer you would need to know what component / hi-low would do the *reset* on pin four of the 555 timer.

Regards

EVIL Teken . . .

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Problem with relay on siren output

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