on topic for once

I appreciate it, though Ken's collecting one from Ant now so you
probably don't need to bother.

cool.

 

darsy scribbled:

One thought that occured to me is that the alarm units "receiving
aerial" wire was either ripped out, or has become disconnected (broken
off) where its soldered/connected to the alarm PCB.

Does holding the fob right next to the alarm box work?

Another thing that might have gone wrong is; the receiver is tuned to
the same frequency as the fob, this tuning is normally crystal
controlled, and I've known crystals deteriorate before and go off
frequency. That'd make it extremely difficult to do anything with it.
If its a really cheap alarm this frequency is controlled by a twiddly
thing, which can vibrate round and change the frequency it listens to,
but TBH I can't ever see Meta using a design quite that naff.

Another thing is, when its been very difficult to disarm, have you been
parked in the same location (approximately)? Its been known for
something in/bolted too a building to chuck out enough RF noise to make
it almost impossible for the keyfobs signal to be picked up amongst the
noise.

 

Poundland: 50-odd button cells for a quid. If they're the larger
flat lithium cells, CR2032, I got a pair of reflective flashing-LED
bicyclists straps, each with a battery, from Aldi last winter for half the
price I'd just paid for one battery at Boots, for my office clock.
....and then realised that the battery cost more than the clock did
originally anyway. :-(

--
Ivan Reid, Electronic & Computer Engineering, ___ CMS Collaboration,
Brunel University. Ivan.Reid@[brunel.ac.uk|cern.ch] Room 40-1-B12, CERN
GSX600F, RG250WD "You Porsche. Me pass!" DoD #484 JKLO#003, 005
WP7# 3000 LC Unit #2368 (tinlc) UKMC#00009 BOTAFOT#16 UKRMMA#7 (Hon)
KotPT -- "for stupidity above and beyond the call of duty".

 

CR2032 sounds right I think, but I know they're definitely
3v cells which makes them both uncommon and expensive
.... and you need two!

Boots didn't have the right ones, as I'd already tried in there.
Maplins sell the right ones for just over a pound each I think,
but typically I didn't find this out until after I'd bought them.

 

Not that uncommon -- they're the batteries used to back up the CMOS
configuration memory in most motherboards.

The main Boots in UXB seems to have quite a large battery stock,
but I guess it's a bit bigger than most Bootses.

--
Ivan Reid, Electronic & Computer Engineering, ___ CMS Collaboration,
Brunel University. Ivan.Reid@[brunel.ac.uk|cern.ch] Room 40-1-B12, CERN
GSX600F, RG250WD "You Porsche. Me pass!" DoD #484 JKLO#003, 005
WP7# 3000 LC Unit #2368 (tinlc) UKMC#00009 BOTAFOT#16 UKRMMA#7 (Hon)
KotPT -- "for stupidity above and beyond the call of duty".

 

Yes there is, You just need to know where it is.

 

Come on then, spill the beans.