Looking for a 'tripwire' flashlight

[Lynx_Arc]

I would just go with a mechanical switch that is very close to the door that you can turn on/off when you enter/exit. I've been in basements and closets all my life that you open the door and turn on the light and turn off the light and close the door. Just make sure when you turn the light on/off you can see it on regardless of the time of day/night so you can make sure and turn it off. One other thing if your shelter is large you can put in a a pair of 3 way switches one on the inside and one on the outside and install indicator lights on them to show power on/off. This way you can turn the light on before you enter and if you forget you can turn it on while inside and off also when you want to sleep inside.

[adnj]

I only skimmed the thread...

If the structure is steel, run 12 volt into it from an outside 120/12V transformer or solar panel to keep a small gel battery charged.

Use a burglar alarm microswitch to sense the door open/close and a wall switch for override while inside.

Illuminate with whatever you want. Install a 12V cigar lighter socket for accessories, phone charger, etc.



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[turbodog]

I only skimmed the thread...

If the structure is steel, run 12 volt into it from an outside 120/12V transformer or solar panel to keep a small gel battery charged.

Use a burglar alarm microswitch to sense the door open/close and a wall switch for override while inside.

Illuminate with whatever you want. Install a 12V cigar lighter socket for accessories, phone charger, etc.



Sent from my LG-V520 using Tapatalk

Yes, it's steel. I like the idea of a gel cell on charge. Might come back to that this fall/winter when things slow down some.

As an aside, I don't think people are really understanding the main problems I encountered:

1. need a light that turns on automatically... not all people know where a switch is, or have time (in a panic) to find it
2. main power could be out, so you could be entering in the dark
3. battery needs to stand up to heat/cold, shelter is in corner of garage
4. can't run a/c power due to steel structure and risk of electrocution if tree falls through roof/etc
5. very high risk of accidental turn on due to the entire structure vibrating/resonating from vehicle noises in garage

The other day (about 2-3 months ago now) we needed to be in the shelter. There was zero time to grab a light on the way out the door... and that's significant as they are stashed all over the house. Made me realize the need for an auto light.

It's not a huge shelter, but is rated by texas tech for f5 storms.

[kingofwylietx]

Just grab a few of those cheap plastic D-cell flashlights that are brightly colored. Throw them in there, anyone going inside will see them or feel them when feeling around.

Or, hang one on the outside of the shelter by a string that people can grab on the way inside.

I don’t imagine there will be any strangers going in there because a stranger will not know that you have a shelter. Whoever yells “run to the shelter” can also yell “and grab the flashlight off the handle on your way in”.

[AstroTurf]

I have a zebralight headlight mounted to the strap on the back of a ballcap on my nightstand at night. It is always on the lowest lumen setting. Always setup in the same way/position every night. Quickly secured on my head, and a quick double click gives me all the light i need to relieve myself in the toilet. Disciplined repeatable actions are whats needed. IMHO.

Jim

[turbodog]

Well running for your life with no notice removes time to grab things. It also injects adrenaline which decreases fine motor skills. Before the other night's storm I would agree with all these 'plans'. Afterwards... nope. Need something automatic.

[Lynx_Arc]

A battery powered light with a switch on the outside and another on the inside so before you go in you turn the light on and a bug out bag inside of the room full of stuff including other lights and lanterns. Even in a hurry people can shut doors and turn lights on/off easily if the switches are placed correctly.

[turbodog]

A battery powered light with a switch on the outside and another on the inside so before you go in you turn the light on and a bug out bag inside of the room full of stuff including other lights and lanterns. Even in a hurry people can shut doors and turn lights on/off easily if the switches are placed correctly.

That's great unless the A/C power is off.

I think we're gonna have to agree that we don't see eye to eye.

Thanks.

[idleprocess]

That's great unless the A/C power is off.

I think we're gonna have to agree that we don't see eye to eye.

Thanks.

Everybody has a plan until they get punched in the mouth.

Every evening I have the often humbling experience of trying to manage the process of starting to walk the dogs. A series of things has to happen in about 30 seconds:

1. Grab hat
2. Grab crap sacks
3. Collect the leashes that the mutts have been dragging behind them
4. Retrieve keys from pocket
5. Open the door without allowing cat to bamf through it
6. Expel the dogs
7. Close the door
8. Lock the door
9. Pocket keys
10. Extract flashlight from pocket and light it
11. Ensure the mutts aren't experimenting with perpetual motion

Steps 1 through 5 have to be completed before the senior mutt decides that he's transcended the requirement of urinating outside. Steps 5 through 7 must be performed as fast as possible. Step 8 & 9 are also ideally done as fast as possible so the dogs can perform a #1 on the lawn as opposed to the walkway; the dogs are typically exerting maximum tension on leashes at this point. Steps 9 through 11 are also ideally done as soon as possible since such antics will likely make them sick ... hours later when the causality is utterly lost on them.

While I can usually pull this rehearsed sequence of events off without a hitch, there are still errors several times a week. Usually these are recoverable. But sometimes exciting things happen such as the cat ninja'ing so as not to alert the dogs then bamf'ing out the door, dropping my keys at an inopportune time, forgetting the crap sacks, one of the mutts slipping a harness, a loose dog exciting the mutts, or locking the door / pocketing keys / fumbling for that flashlight as the dogs attempt to wrench my arm out of socket in their eagerness.

And all of the above is routine. I can't imagine being jarred into action from a deep sleep - fighting sleep disorientation - scrambling into a shelter for safety and expecting to have the presence of mind to locate and switch on a flashlight. As such I appreciate the simplicity of the tripwire, which buys some time to spool down a likely adrenaline rush without the added stress of fumbling around for something that's going to require fine motor skills to operate. Given the somewhat low likelihood of needing to make that mad dash to the shelter, practicing under realistic conditions isn't feasible and the tripwire solves the problem in an expedient fashion.

[adnj]

I have some property on an island that has a large house, a so-so public electrical supply, high risk of tropical storms, and an 8" concrete wall safe room.

Lights are automatic. There is a whole house LPG back-up generator, battery back-up for the safe room lighting, 4000 gallons of on-site potable water storage, 8 spare 18650 flashlights, battery backup for the entry gate and the garage door, handheld VHF 2-way radios, and 3 spare cell phones with chargers.

Everytime there is a storm or a power outage, something unexpected seems to happen. The best laid plans...

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[Dave_H]

In case anyone's interested I found a clearout at Ikea, a metal strip designed to mount inside large filing cabinet, so that two LEDs which come on when the door opens. Product is called OMLOPP (love those Swedish (?) names). https://www.ikea.com/ca/en/p/omlopp-...lour-70435730/ It has two small SMT white LEDs, operates from 12-24v dc, PSU not supplied. It uses an IR LED+detector (not PIR) which senses door proximity; seems to work well. Put small opaque object or some tape loosely over detector and connect to the "trip" cord. Either that, or position so it comes on when a door opens. Form factor is long/thin and could be attached to wall, door or ceiling. Light consumes 130mA at 14v (1.8W) dropping to 60mA at 12v (0.7W). Downside is standby current ~4mA which is not bad for a larger 12v battery (7-9Ah gel cell), could be a problem for smaller ones. If the OP doesn't find this useful, someone else might. Dave

[turbodog]

I built something from parts already but thanks for the info.

[Ken_McE]

When you walk through the door, the string pulls the pin out, microswitch contacts close, and leds come on.

How do you reset it?

[Ken_McE]

Turbodog, I know that you don't want to run line voltage through the wall of the shelter, that you see it as a safety hazard. What would you think about running 12 volts DC in through the wall? You could have a smart battery tender plugged into the garage somewhere and have a good sized 12 volt battery that lives inside the shelter and is always available to run things.

[turbodog]

How do you reset it?

Push the microswitch down again, and reinsert the pin beside it into the hole in the wood backboard. If CPF pictures were not such a pain I would throw up a pic.

[turbodog]

Turbodog, I know that you don't want to run line voltage through the wall of the shelter, that you see it as a safety hazard. What would you think about running 12 volts DC in through the wall? You could have a smart battery tender plugged into the garage somewhere and have a good sized 12 volt battery that lives inside the shelter and is always available to run things.

Would rather not have live a/c anywhere near the steel structure. I'm in good shape currently. The 'tripwire' light is in place along with 2 small spare lights, 2 small 'd' cell powered fans, some water, and spare batts for the fans.

We have a LOT of large tall trees around the house. They could come down and push live wires into areas that I would rather them NOT be in.