ECN Forum
Posted By: AZSam Strange Things Happen - 12/01/07 04:38 PM
Installed new security camera at my firing range which, when triggered, sends RF signal to start DVD recorder. Neighbor,1/4 mile to the south,had his remote starter activate on one of his cars several times. As he knows I have quite a few RF items he mentioned his problem. I checked his receiver frequency and it was identical to my camera. Changed board in camera xmitter to different freq, problem solved.
With so much more RF involved in homes, is cross contamination becoming a problem?





Posted By: renosteinke Re: Strange Things Happen - 12/01/07 04:49 PM
It's certainly something to consider. It's probably best to NEVER leave things at their 'default' or 'factory' settings.

I installed several ceiling fans in a new house. A remote used in one room would often operate fans in several rooms. Changing the settings fixed that.

I was being awakened by my doorbell at the strangest times ... and no one was ever there. It turned out that a paralyzed neighbor was using the same sort of cordless doorbell to signal his nurse. Again, changing the DIP switches solved the problem.
Posted By: gfretwell Re: Strange Things Happen - 12/01/07 05:41 PM
My niece had a baby monitor that was on the same frequency as her neighbor's cordless phone ... and a kinky sort the neighbors were. (lots of phone sex).
Posted By: geoff in UK Re: Strange Things Happen - 12/01/07 07:21 PM
Apart from the old analogue cordless phones, and perhaps a cheap doorbell, I would have expected decent remote control systems to use a digital code to avoid mis-operation.
Going into a car park and finding someone elses car unlocking I think very unlikely. It's certainly never happened to me. This isn't down to (just) the frequency, but the need to match the preset code.
I've heard stories of car control systems being blocked by powerful transmitters nearby, simply overloading the receiver, but never of actually operating due to the interference signal.
Is it really a remote start on the car? Sounds potentially dodgy to me! Certainly ought to be protected from operation by stray RF signals.
Posted By: Obsaleet Re: Strange Things Happen - 12/03/07 01:54 AM
I once worked for a company that used the bosses home as our shop. His cordless phone picked up the baby moniter. We listened to a couple of nooners before he figured out which nieghbor it was and told them he had there baby crying or some bull(lol)


Ob
Posted By: leland Re: Strange Things Happen - 12/03/07 02:04 AM
Two times: Most recent 2 wks ago, working on a friends new house. 1 friend went to leave, hit his remote start (factory Nissan) locked the doors on the 98' Chevy.

1ST, time: 02 chevy 1 ton van, Heading up to a radar site.The seat belt light, and other warning lights started to activate in the vehicle.
Wish I had something more "freaky", But thats that.
Posted By: AZSam Re: Strange Things Happen - 12/03/07 10:29 AM
My son-in-law obtains most of the receivers/transmitters that I use around my property. He obtains most from, or through, a company in Enfield, UK. He tells me that the electronics are far superior to the domestic products. In support of this, I have had 0 failures of 17 items with anything he has obtained but 3 failures of 11 w/domestic. My cell phone still causes squealing in my NuTone intercom system if I get too close.
Posted By: IanR Re: Strange Things Happen - 12/03/07 01:27 PM
Once, I was at my mother's house, I locked my Camaro with my key FOB and my mothers' Chrysler 300 unlocked. Only happened once, though. The rolling codes just happened to be the same at that instant, I guess.
Posted By: hardwareguy Re: Strange Things Happen - 12/04/07 08:38 AM
Originally Posted by gfretwell
My niece had a baby monitor that was on the same frequency as her neighbor's cordless phone ... and a kinky sort the neighbors were. (lots of phone sex).


HAHA! I wish my calls were that funny! Me, it's just changing WiFi channels because someone has no internet.
Posted By: SteveFehr Re: Strange Things Happen - 12/04/07 06:27 PM
I remember the old days, when we'd drive down the road punching the garage door opener button, seeing whose doors would start rolling up...
Posted By: pauluk Re: Strange Things Happen - 12/04/07 08:24 PM
I knew there was a reason I liked hard-wired stuff wherever possible!
Posted By: leland Re: Strange Things Happen - 12/05/07 02:10 AM
Originally Posted by SteveFehr
I remember the old days, when we'd drive down the road punching the garage door opener button, seeing whose doors would start rolling up...


My 1987 neighborhood, still fun. No results yet, But gives me something to do weaving thru.
Posted By: WESTUPLACE Re: Strange Things Happen - 12/05/07 04:40 AM
We are getting to dependent on wireless stuff. I have lots of problems with wireless routers, most all use 2.4g there are only 3 clear channels. With wireless networks in every home on the block & cordless phones and other wireless intercoms and such all sharing the same piece of the 2.4g band, makes the routers not have much range.
Posted By: gfretwell Re: Strange Things Happen - 12/05/07 05:49 AM
I haven't tried it but I bet there are a dozen WiFi networks I can see from my house. Probably more if I make one of those coffee can antennas
© ECN Electrical Forums