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 Post subject: IC's and Dallas switches
PostPosted: Sun Jul 12, 2020 7:04 pm 

Joined: Fri Nov 18, 2016 8:49 pm
Posts: 12
Can someone post some pics of Dallas switches? I am having trouble telling the difference between IC's and Dallas switches... Google wasn't much help... Is there an easy way to tell the difference?


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PostPosted: Sun Jul 12, 2020 9:15 pm 
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Joined: Fri Feb 07, 2020 3:25 pm
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∆ this

And Mercury wetted relays

Given how important it is (hazmat)
It's hard to watch out for them having never seen one

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PostPosted: Sun Jul 12, 2020 9:53 pm 
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Battery backed Real time clock IC boards: aka Dallas Switch
These are unacceptable


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PostPosted: Sun Jul 12, 2020 9:54 pm 
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Battery backed real time clocks with batteries removed: peripheral rate


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File comment: Obviously this has the battery still in the image
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PostPosted: Sun Jul 12, 2020 10:03 pm 
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Mercury:


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PostPosted: Sun Jul 12, 2020 10:04 pm 
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Also Mercury


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PostPosted: Sun Jul 12, 2020 10:04 pm 
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Also Mercury
And finally you may see these on old equipment.


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PostPosted: Mon Jul 13, 2020 12:38 am 

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tHANK YOU EVERYONE!


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PostPosted: Tue Jul 14, 2020 1:15 pm 
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For mercury relays,

Attempt to remove or place whole board in hazmat?

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PostPosted: Tue Jul 14, 2020 1:34 pm 
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For dip (IC) style only ones in sockets. Otherwise the board is hazmat.

For canister style if you have enough experience to make clean breaks in a PCB you cou punch a hole around it and remove the can from the board. But generally best to hazmat the whole board.

For tube style they usually have a quarter or half turn socket. Push down gently and try to turn it. Some are clockwise some counter-c.

Mercury is a neurotoxin. Impossible to clean up in quantity without experience, and causes toxic stains in organics and cloth. If you aren’t 100 percent sure you can remove it safely don’t try.

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