On 03/12/2012 06:23 AM, N_Cook wrote:
Phil wrote in message
...
N_Cook wrote:
My tip for a SM IC to DIL adaption.
3/8 inch wooden dowel , cut a small flat to receive the SM IC neatly.
0.2mm tinned copper wire, free end looped around first pin , around the
dowel with a bias so the wire lays tight against the up-side of the
opposite
pin and wind biased spiral fashion over the top of the IC and around the
dowel. Finish with a final loop around the last pin. Clamp free end of
dowel
in a vice and solder each pin to its wire. With a razor cut the wires
over
the top of the IC close to the pins and cut along the centre back of
the
dowel. straighten wires. Some 1mm PTFE spaghetti tubing , small length
pushed over every other wire and glued to the IC body. Fan out the wires
and
solder to the pins of a turned pin socket. Continuity check for contacts
and
bridges.
Wow, that's a lot of work. Why not just use a footprint adapter, e.g.
the ones from Bellin? http://www.beldynsys.com/
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net
I was not aware of them but can they adapt from wide .45 inch SM down to .3
inch DIL for this purpose and 18 pins ? And for one offs,? thats more for
production environment at 40 squid a pop .
My free "adaptors" are fully adaptable to any contingency, just don't look
so pretty, and probably a bit higher profile due to use of a socket.
I don't think you'd use them in production, because you could lay out
your own and they'd probably be cheaper. The Bellin ones work out to be
under a buck each. They're dead useful for protos and repairs--I have a
couple of sheets of them, about $70 worth, and use them with some
regularity. You do need a couple of rows of pins to connect to the main
board.
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
160 North State Road #203
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net