floating capacitance

This SD card tends to catch in the socket on insertion, which is a nuisance.

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Adding one 27 pF 0603 cap lifts it up a bit and fixes the problem. It's on the schematic for the next rev.

It's cool, an unconnected capacitor floating in the middle of the schematic sheet.

--

John Larkin         Highland Technology, Inc 

Science teaches us to doubt. 

  Claude Bernard
Reply to
jlarkin
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Nice way to use a component on the PCB for that function :-)

Reply to
Klaus Kragelund

Sort of like a Sesamoid bone?

Reply to
Mike Coon

Don't the body sizes shrink (from the vendor) with time?

RL

Reply to
legg

Should've used one of these...

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--
Cheers 
Clive
Reply to
Clive Arthur

The "available" sizes shrink. The height is part of the part number, so that part will always be the same.

--

  Rick C. 

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Reply to
Ricketty C

I wanted to use a copper circle, solder pasted, but production says the solder is only 4 mils thick, 5 with the copper. It might dome up a bit in the middle, but the cap is thickness is right and reliable.

I'd use it as a bypass, but all my reasonable bypass values are 0805s.

--

John Larkin         Highland Technology, Inc 

Science teaches us to doubt. 

  Claude Bernard
Reply to
jlarkin

There are explosives that are, by design, very hard to detonate. Exploding wires and the usual initiators won't work. What does work is something like that, a thinfilm resistor with some kapton-like coating that vaporizes and slaps really hard and fast.

Reply to
John Larkin

I feel pity for someone who tries figure out why that chip is there.

Reply to
LM

Competitors. Spies. Good.

Maybe I should connect it to something to make it more confusing.

Reply to
John Larkin

Patent immediately.

RL

Reply to
legg

Nice simile.

Danke,

--
Don, KB7RPU 
There was a young lady named Bright Whose speed was far faster than light; 
She set out one day In a relative way And returned on the previous night.
Reply to
Don

meh... you're using a socket intended for edge-of-board access in the middle of a board, in that location you should use socket with a hinged door.

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--
  Jasen.
Reply to
Jasen Betts

I did that many years back for Flex-into-Samtec connector. There were actually two to help get the height right for guiding into the connector.

Reply to
Simon S Aysdie

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