AArdvark gets door jammed

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AArdvark
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AArdvark gets door jammed

Post by AArdvark » Mon Jun 01, 2020 5:21 pm

My garage door opener was fine, I just want to put that out front. The bulbs were the old incandescent style however and those get hot, hot enough to cause discoloration on the translucent plastic covers. this is partly my fault because I put a plug adapter thingie on the back bulb so I could have one of those laser pointer gadgets hooked up to it and it moved the bulb really close to the cover.

My solution was to replace the bulb with an led type, cause I'm all modern and everything. At the time the only bulbs I had available...(this means I'm too cheap to buy more bulbs just for the garage door opener) were the bluish tinted led ones that look like florescents. I think I got them from my mother in law's apartment after she left the old folks home horizontally. Good enough for the garage.

Except that they weren't. I dunno, maybe I have this thing about lighting. Bluish tinted florescent lighting is for industry and stores, not for the home. So I changed them to a soft white, happy home tint. I bought a four pack but only used two.

So the next day my garage door wouldn't close.

Huh. The car remote must all have old batteries or something. Closes fine with the wired-up push button, just not with the car remote. When we came back home the opener worked fine. So I changed out the battery and called it good.

Next day same thing. No closing from the car remote. So I got out and tried the other car remote. Same problem. Then I tried the remote on the side of the garage door and that wouldn't close it either. It will open just fine with all the remotes but wont close. I had to get out of the car and hit the wired push button again.
So I changed the soft white led bulbs back to the bluish tinted ones and all the remotes work fine again. I've never heard of this before. I think there must be some kind of jamming field generated by these particular bulbs. I'd like to test it but am not that knowledgeable with RF stuff. I'll have to ask my brother, he's got all that kind of test stuff at his place.

THE
RADAR JAMMING
AARDVARK

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Jizaboz
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Re: AArdvark gets door jammed

Post by Jizaboz » Mon Jun 01, 2020 5:40 pm

AArdvark wrote:
Mon Jun 01, 2020 5:21 pm
My garage door opener was fine, I just want to put that out front. The bulbs were the old incandescent style however and those get hot, hot enough to cause discoloration on the translucent plastic covers. this is partly my fault because I put a plug adapter thingie on the back bulb so I could have one of those laser pointer gadgets hooked up to it and it moved the bulb really close to the cover.

My solution was to replace the bulb with an led type, cause I'm all modern and everything. At the time the only bulbs I had available...(this means I'm too cheap to buy more bulbs just for the garage door opener) were the bluish tinted led ones that look like florescents. I think I got them from my mother in law's apartment after she left the old folks home horizontally. Good enough for the garage.

Except that they weren't. I dunno, maybe I have this thing about lighting. Bluish tinted florescent lighting is for industry and stores, not for the home. So I changed them to a soft white, happy home tint. I bought a four pack but only used two.

So the next day my garage door wouldn't close.

Huh. The car remote must all have old batteries or something. Closes fine with the wired-up push button, just not with the car remote. When we came back home the opener worked fine. So I changed out the battery and called it good.

Next day same thing. No closing from the car remote. So I got out and tried the other car remote. Same problem. Then I tried the remote on the side of the garage door and that wouldn't close it either. It will open just fine with all the remotes but wont close. I had to get out of the car and hit the wired push button again.
So I changed the soft white led bulbs back to the bluish tinted ones and all the remotes work fine again. I've never heard of this before. I think there must be some kind of jamming field generated by these particular bulbs. I'd like to test it but am not that knowledgeable with RF stuff. I'll have to ask my brother, he's got all that kind of test stuff at his place.

THE
RADAR JAMMING
AARDVARK

Huh interesting. I have observed this same sort of thing with Nintendo Wii controllers. If I had a string of X-mas led lights around or near the TV, Wii remote controller wouldn't work.

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Flack
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Re: AArdvark gets door jammed

Post by Flack » Mon Jun 01, 2020 7:36 pm

Different problem. The Wii sensor bar uses infrared to track the Wiimote. A lot of people who got Nintendo Wiis for Christmas reported that Christmas tree lights interfered with the Wiimote's tracking system.

A garage door opener should work non line of sight (ie -- from outside, when the door's shut). Here's a blog post about RF interference from cheaper LED bulbs (the cheaper ones have less RF shielding, apparently): https://blog.lightingsupply.com/blog/do ... or-openers

I'd replace those bulbs and then use them at work to mess with things.
"Jack Flack always escapes." -Davey Osborne

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bryanb
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Re: AArdvark gets door jammed

Post by bryanb » Mon Jun 01, 2020 7:46 pm

At least it was an easy fix. I was thinking maybe it was just a rogue pair of bulbs not built to specs and emitting on frequencies it shouldn't, but I did a search and found out this seems to be a very common problem. 1000 Bulbs has a blog post about RF quiet bulbs. They specifically mention LED bulbs interfering with garage openers and say you might still have problems even if you have bulbs that are shielded to prevent interference and meet FCC Part 18 standards. CFLs and rough service incandescents (where heat isn't an issue) still have their place evidently.

LED bulbs are great from an efficiency and theoretical longevity point of view, but it's too bad the light bulb is now much more complicated than what Edison and the earlier pioneers envisioned. Light bulbs, how do they work?!

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Tdarcos
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Re: AArdvark gets door jammed

Post by Tdarcos » Mon Jun 01, 2020 9:29 pm

Ever since incandescent bulbs started being phased out, I learned to handle ratng in lumens. To know the equivalent that works for you, multiply the incandescent watts by 16. So a 40 watt is 640 lumens, 60 watt is 960, and so on. I ususally needed about a 100 watt bulb to see okay, or 1600 lumens. That is a 26 watt fluorescent, or a 13 watt LED.

Incandescents forced electricity through a tungsten fillament, which glowed, wasting most of the energy as heat, which is why incandescent light bulbs were hot to the touch. Fluorescents are more efficient, and LEDs even more so.

An LED excites a semiconductor to trigger the generation of photons, but as a result it can generate radio-frequency interference (RFI), in some cases on the same frequencies as portable telephones (the kind people have on home phone lines, not cell phones) and garage door openers. Depending on bulb and garage door opener or transmitter, the interference is in the 2.4 or 5 GHZ frequencies. The solution is what you did, either find one that has better shielding or the color does not interfere with the garage door opener. In looking this up I discovered garage door opener devices are radios; I thought it was like infrared as a TV remote uses, only you don't have to put the target outside as the transmitter is an actual radio, thus LEDs can interfere with them.

If you look on the transmitter or the opener itself there will be an FCC advisory saying it is approved for use subject to two conditions (1) it must not cause interference to other devices; (2) it must accept interference from other devices, including interference which may result in undesired operation. And I didn't even have to look that up, I remembered.
"I said, ooh, I'm blinded by the lights
No, I can't sleep until I feel your touch."
-The Weeknd, Blinding Lights

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Jizaboz
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Re: AArdvark gets door jammed

Post by Jizaboz » Mon Jun 01, 2020 10:45 pm

Flack wrote:
Mon Jun 01, 2020 7:36 pm
Different problem. The Wii sensor bar uses infrared to track the Wiimote. A lot of people who got Nintendo Wiis for Christmas reported that Christmas tree lights interfered with the Wiimote's tracking system.

A garage door opener should work non line of sight (ie -- from outside, when the door's shut). Here's a blog post about RF interference from cheaper LED bulbs (the cheaper ones have less RF shielding, apparently): https://blog.lightingsupply.com/blog/do ... or-openers

I'd replace those bulbs and then use them at work to mess with things.
Ahh ok! Come to think of it I recall if I had candles burning in the coffee table in front of the tv it would also happen.

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Tdarcos
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Re: AArdvark gets door jammed

Post by Tdarcos » Tue Jun 02, 2020 7:26 am

Anything requiring line of sight or aiming at the target is using infrared (think of aiming a laser pointer). Anything that works even if you can't see the target is using no-license-required radio frequencies such as cordless telephones and wifi. Candles and incandescent/fluorescent lamps may affect infrared but should have no affect on radios.

Danger sign on very large laser, used to cut 3/4" steel: DANGER! IF YOU LOOKED AT THIS LASER BEFORE, DO NOT LOOK AT LASER WITH YOUR REMAINING EYE!
"I said, ooh, I'm blinded by the lights
No, I can't sleep until I feel your touch."
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AArdvark
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Re: AArdvark gets door jammed

Post by AArdvark » Tue Jun 02, 2020 3:06 pm

What can you tell us about lasers for cutting steel?

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Billy Mays
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Re: AArdvark gets door jammed

Post by Billy Mays » Tue Jun 02, 2020 9:37 pm

AArdvark wrote:
Tue Jun 02, 2020 3:06 pm
What can you tell us about lasers for cutting steel?
They bounce off my chest.

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