what powers the wireless sounders, internal batteries,if so why dont you tap off the trigger voltage that sets the sounder off..

internal batteries powers the unit, I am taking off the 2 wires that go straight to the sounder, measuring 60v ac

 

He meant - can you use the signal that turns on the sounders to turn on the siren?

I'd add some surveillance cameras too...

 

is anyone able to provide me with a parts list that I can pick up tomorrow from Maplin?

This is the way I would have done it.
Max.

 

He meant - can you use the signal that turns on the sounders to turn on the siren?

I'd add some surveillance cameras too...

I have 6 cameras up in total on the property however the person who was snooping came prepared and hooded up, the floodlights help provide what he was wearing but the police said it could be anybody so in the mean time ill just keep the chainsaw handy....

 

I'd be out there with a shotgun...

 

I am not familiar with the term "sounders" so I don't know their workings, but if you want this relay to stay on (latch) and the sounders are momentary you'll have to provide some sort of latch/reset..

 

I'd be out there with a shotgun...

Unfortunately I only have a c02 rifle and pistol, then again could just put our lasses picture on the front door.......

I am not familiar with the term "sounders" so I don't know their workings, but if you want this relay to stay on (latch) and the sounders are momentary you'll have to provide some sort of latch/reset..

As long as the sounder is live and showing the 60vac then my siren 12v circuit needs to remain working, once the sounder stops and the 60vac drops then my circuit needs to open

 

Sounder = Siren ????

 

Sounder = Siren ????

Far as im aware...

 

Unfortunately I only have a c02 rifle and pistol

Hopefully your law enforcement can get there quickly when needed. In my area, might get some help in 45 minutes; people in my neighborhood have to be more self sufficient out of necessity...

 

Hopefully your law enforcement can get there quickly when needed. In my area, might get some help in 45 minutes; people in my neighborhood have to be more self sufficient out of necessity...

Took them just under 1 hour to arrive, I was told that it wasnt priority as the person had left the scene and didnt break an entry.......so my next move is pretty clear, invite him in first and then phone the police...

 

Took them just under 1 hour to arrive, I was told that it wasnt priority as the person had left the scene and didnt break an entry.......so my next move is pretty clear, invite him in first and then phone the police...

Seems about the same pretty much anywhere - most coppers couldn't catch a cold!

 

Evening all, I put a circuit together about half an hour ago.
I managed to get the voltage at point A down to 1.4v however when I connect the opto coupler the voltage reduces to .7v...... obviously this isnt enough to close the circuit on the other side as planned.
Any ideas?

 

Evening all, I put a circuit together about half an hour ago.
I managed to get the voltage at point A down to 1.4v however when I connect the opto coupler the voltage reduces to .7v...... obviously this isnt enough to close the circuit on the other side as planned.
Any ideas?

The voltage divider is probably more than you need for driving an opto-coupler LED.

I'd go for a simple series current limiting resistor - with the large available voltage headroom you have, its probably safe to ignore a voltage as small as the Vf of the opto LED.

Look on the opto coupler data sheet and find out what current the LED needs to make the output transistor conduct.

Someone else estimated that your peak rectified and smoothed voltage will be about 80V, it wouldn't hurt to actually measure it and see. Use Ohm's law to calculate the resistor value to limit the current to the required value - don't forget to calculate what power the resistor will dissipate.

 

Evening all, I put a circuit together about half an hour ago.
I managed to get the voltage at point A down to 1.4v however when I connect the opto coupler the voltage reduces to .7v...... obviously this isnt enough to close the circuit on the other side as planned.
Any ideas?

With no cap as shown, the DC will be <60vdc.
The one in #23 works, I tried it
Max.