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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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Mentor
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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Advent Win
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 )
 

telectrix

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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.
 
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