31 Dec
2008
31 Dec
'08
4:17 p.m.
dwight elvey wrote:
When one puts a chip into a socket with tention
spreading
the legs, it will tend to pop out of the socket.
Why it does this I'm not sure because you'd think that
with the lead spread out they'd tend to pull the chip
into the socket.
I suppose you can ignore the outside edge of the socket, which results in an
IC leg at an angle pressing against the inside edge:
XXXXXXXXXXXXXXXXX
IC leg -> / \
|/| <-- sockets --> |\|
... if the IC legs are under tension and trying to pull inwards, it generates
a lifting effect against the inner edges of the IC socket's pins.
It wouldn't surprise me if heat doesn't make this worse, and vibration almost
certainly will.
in parts and if used for sockets, one should
straighten
the leads first.
I've got a nice little tool for doing that somewhere...
cheers
Jules