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Cool alternative to reeds http://www.magnasphere.com/downloads/technology-overview.pdf

One problem is that the twin wires coming from the adapter have no colour code, just black sheathing, so I cannot tell which is positive and which negative. If your not sure of polarity from your DC power supply, get a full wave bridge rectifier of the right rating for your purpose from...

As Europlex says there are ways to do this, but definitely not ideal, Complete Security Services in Frodsham may be worth a go to sort this.

Wouldn't be difficult to make as others have said it's just 3 leds mounted on a single gang blanking plate (if you do decide to have a go at drilling the plate, I found using a cone cutter to be the most effective without shattering)...

[ I'm sure I've seen them in banks. You have and they have meaning to those tasked with unlocking.

How about usining one of these? http://www.screwfix.com/p/20mm-25mm-galvanised-reducers-pk-2/89064

Grades are defined in 50131-1, but they are based on the skills, knowledge and equipment that an intruder would/may be capable of using, from this, the type of premises where this risk may exist was developed by insurers or risk mitigators.

HI, The ones I have which were used with a Scantronic programmer are: P57AL93C46N If you cant track your exact one down, I can send you one of these to try

Whats the details off the chip, I'll have a look in my old scanny programmer box to see if I have one I can send to you.

On secure doors, some manufactures route a small channel on the non attack face (inside of the door) then apply laminate over it, rather than drill the door which would be a nightmare.

The OP could always go with a 17Ah battery charged from a suitable power supply unit and feed the DC output directly in to where the transformer secondary is connected on the board (noteing all the safety aspects when working with electrcity, ensure mains is isolated etc). I have done this on...

Chris The walls must have been way out of wack to have a 2 " gap, this link might have helped, but with that stand-off distance I'm not sure! http://www.drylinepro.com/acatalog/this_is_a_brochure_page.html

Fair point John, I missed the web cam bit :oops:

The only downside to infra red illumination is that the iris cannot control the amount of light it lets through, not sure if the close proximity of a IR illuminator is a good idea (>2 meters is recommended here) : http://www.rayteccctv.com/education-centre.aspx Complete guide to CCTV...

The first picture shows a consumer owned kit within a meter box, ideally I would agree that you should keep thing seperate for ease. http://www.eon-uk.com/downloads/m7149_positioning_of_commercial_connections.pdf

Sure, its the same as this one: http://www.meterboxes.co.uk/content/PDF%20Files/M01023.pdf Things might be different if the supplier installed the meter board, but in my case it belongs to the homeowner.

I challenged the above with my supplier as I wanted to put an generator input mounted to the external intake board, they put forward no objection when I said as I own it, they would have to leagally adopt the meter box in order to maintain exclusivity of use.

To the OP, yes of course you can use solid core phone cable to extend your system, you will encounter problems if you overtighten the connection or repeatedly remove and reconnect as it will fracture. BS4737 allowed the use of soild core cable (lace wiring and tube & baton for example) and...

I concur, worked on quite a few where the circuits were all red singles, good job for the tone tester, for Grade 4 systems this should be mandated.

Could have misread as ICO (Information Commissioners Officer) in relation to CCTV, but domestic installation of CCTV out of scope anyway.