Electronics > Projects, Designs, and Technical Stuff
How to electronicly detect a pest trap has been triggered.
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DTJ:

--- Quote from: oldway on September 20, 2017, 11:32:31 am ---Place a microphone to catch the cries of the animal when it has the paw broken by the trap ... :--
It's cruelty to animals ... Permitted in Australia?  :scared:

--- End quote ---

Pretty sure the OP is Kiwi.

Similar flags but different tastes in livestock to us Aussies.
mrpackethead:
The traps have been tested and approved to be humane.  A stoat is dead before it knows what has happend. Its instant.
DaJMasta:
It's sort of too bad the trap is all metal, if you got the right mix of materials used in the base and support structure, you could just wire a sense line on the trigger and the arm and when the sense line goes open, your trap is sprung.
ez24:

--- Quote from: mrpackethead on September 20, 2017, 11:56:46 am ---The traps have been tested and approved to be humane.  A stoat is dead before it knows what has happend. Its instant.

--- End quote ---

Sounds like stoat is something you order when you go to a bar, "hey bartender, give me a tall cold stoat".

https://en.wikipedia.org/wiki/Stoat

Question - do birds eat sand flies (the most evil thing in the world)?

Example of a micro switch

https://www.amazon.com/URBESTAC-Momentary-Hinge-Roller-Switches/dp/B00MFRMFS6/ref=sr_1_3?ie=UTF8&qid=1505925717&sr=8-3&keywords=micro+switch
mrpackethead:

--- Quote from: vk6zgo on September 20, 2017, 02:05:38 am ---That thing is going to make a seriously loud noise when it trips, so how about a microphone?
Dedicated "mute" ICs used to be available which were used in radios, so if you can get one which just presents a logic level change at its output, you are halfway there.

If you have to fart around setting levels & stuff with a PIC or whatever, it is a bit more messy, but still do-able.

--- End quote ---

This is very true.   And this gives me an idea.     When they go off, they really do go off. Its a very strong spring and it really accelerates very fast. When it hits the base, it really hits.  At least for the said 'victim' the end is quick.
A peizeo electric transducer would certainly pick up the hit.

The problem i have with microswitches ( which would be the easiest way by a long time ) is that these traps are in ugly places, with mud, and rain.  A peizo could be sealed up and attached to the side of the box. 
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