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Does anyone know what these things are? We keep digging these old things up in our yard. They appear to be a hard plastic with some kind of electronics inside them. Thanks.
 

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DPG

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Advent Win
Detonators? What was your land previously used for?
 

littlespark

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What’s on the other end of the flex?
Is there any writing on it, or a sticker?

I’m thinking float switch??

How many have you uncovered?

I would be surprised if it was a detonator of any sort.
 

snowhead

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What type of ground is it?
If it's a desert area they may be moisture sensors for an irrigation system.
 

Megawatt

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Does anyone know what these things are? We keep digging these old things up in our yard. They appear to be a hard plastic with some kind of electronics inside them. Thanks.
@Ruzzell I don’t have a clue as to what that is but call City hall and have someone to come out and check it. The electronics inside is what I would worry about
 

static zap

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how many cores in the flex ?
Is it chunky enough for some current !
(don't touch cores with bare metal -
That Det things got me worried )
 

marconi

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DPG

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I wonder if they are the transducers for a mole repeller buried underground in a garden. Each one generates a high pitched (modulated?) sound which moles hear as indicative of a potential predator - so they scarper from the area insonified by the transducer stopping a garden from being wrecked by mole hills and tunnelling. The wire goes to a power supply or amplifier.

Amazon productView: https://www.amazon.co.uk/Battery-Operated-Ultrasonic-Repeller-Deterrent/dp/B00GLT4REO
They look a bit too well sealed to be emitting anything.
 

Andy78

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They certainly look a bit rough and ready in their manufacture. Just clear tube chopped squashed and sealed. Certainly not made for appearances so perhaps made to be buried. Chopped off and left in the ground after their use was over instead of digging them up.

Some good theories so far, I'm pretty intrigued to be honest. We may never find out though if they are some homemade project.

A good way to figure out their use would be to hand them to someone good with electronics and get them to analyse the contents. BigClivedotcom on youtube springs to mind.
 
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I'm intrigued too now.

How big are they?
Thanks, all, for your input. I'm attaching a couple more photos. Several of these were buried just under the surface of the ground next to my garage. We live in suburban Philadelphia, so I don't think I have to worry about them being some of kind of leftover war ordinance or something. But I am a little hesitant to try to cut them open, in case they are a type of detonator or so. I'm intrigued and surprised that they aren't instantly recognizable to the electricians in this forum.
 

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littlespark

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Telephone joint box?
Or simply a terminal for capping off a single cable.
How many cores?

It’s much smaller than I initially thought from the first photo.
 

Dan

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Can you cut one open and see if there are markings on anything inside?
 

DPG

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Ah, it's transparent plastic. I thought it was crimped metal tubing. Could just be a cable joint, although why you've got so many of them I don't know.
 

telectrix

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hit it with ahammer. if it don'tgo bang, then it's not an electrical problem..
 

James

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I was originally thinking they might be temperature sensors or p.h level sensors.
however, I am leaning toward the mole repellent device that was mentioned by @marconi

it seems the most logical suggestion so far.

as if it was a sensor, it would probably not need to be in a large sealed tube.

please don't take what is below too seriously **

If you are at all concerned about them being explosive, then DO NOT put them all in a bag, bang them down on the counter of your local council and say "are these things explosive?"

You will get an answer, I am sure, but you might have to wait a couple of days (under guard) whilst they do a few checks on both you and the contents of the bag.
 

static zap

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I know some radio hams love burying supplemental earthing , expecting in a star formation ... but insulated !
Was there ever a radio station near by (free energy project !)
(still need clues to how much copper / reistance to rule out some weird heater ! )
 

static zap

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looks like telephone cable ...
How to tell if it's telephone cable - That stuff is amazingly springy ,resists bending straight a bit like spring steel ? (in UK at least)
{May explain curly ness , unless it was wound up for shot}
 

Marvo

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I vaguely remember the many years ago they used to make LED net lights and fairy light strings similar to that where the enclosed the LED's and their associated components in little heat sealed plastic sleeves to try to give them some form of IP rating.
Post automatically merged:

Cut one open and post a few pictures of the components inside please.
 
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static zap

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I'm hoping things have gone quiet ,due to a "downed" telephone cable !
( snagged a few in town helping a bus get thru in the snow -another cold winter )
( he had unwanted rear end steer on a slight slope/camber )
 
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freddo

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How to tell if it's telephone cable - That stuff is amazingly springy ,resists bending straight a bit like spring steel ? (in UK at least)
That's just the crap copper clad steel rubbish that most of the wholesalers seem to stock now. Proper telephone cable is solid copper. That steel stuff is really awful, shouldn't be allowed to be sold.
 

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