[VicPiMakers Projects] I Need a dozen adapters 3d printed

[George Bowden]

Here is a photo of my current prototype using the soldered adapter which I
am trying to avoid.
I remembered that originally I thought of soldering the wires to the
contacts while held in place by the 3d printed adapter, and then
removing the adapter.  This makes the end product even thinner because
there is no adapter needed the end.  And the adapter can be made bigger,
without metal pins to stiffen it.  It is only used to hold the wires in
place while soldering, and while programming.
[image: 20230108_214612.jpg]


On Sun, Jan 8, 2023 at 10:49 PM George Bowden <gtbowdeng at gmail.com> wrote:

> Hi PiMakers with 3D printers.
> I need a small item 3d printed.  It is an adapter for a wifi module.
> Here a picture of the concept.  My dimensions are a little different.
> [image: image.png]
> https://www.tinkercad.com/things/1hrF3ju8OWE
>
> It is a socket for holding one of these ESP8285 modules
> [image: image.png]
> https://twitter.com/esp8266/status/903774378042818560
> The pcb board thickness is 0.74mm, as measured with my callipers.  The
> module's can adds a couple of mm, but that doesn't come into the design.
>
>
> The contacts are aligned front to back.
>
> If I lay stripped 30 awg wires (0.2546 mm diameter) into the slots for the
> wires, I can push the module into the board slot to make contact with the
> wires.  Then I cut the wires poking through the bottom, along the board
> edge, to break the connection from the front pad to the back.  I may have
> to cut the wires and bend them into place beforehand if they dont slide
> into place. The contacts are aligned front to back.
>
> The Board slot needs to be  1.2492  (0.74+2*0.2546) minus the compression
> of plastic to keep the wires pressed against the contacts.
> I don't know the compression characteristics of the plastic used in 3D
> printing. the wires may sink .1mm into the plastic. If so a slot of 1.1mm
> may be right. I could fill a thticker slot of 1.25mm  with slips of paper
> to get the right compression.
>
> Here is a rough sketch.  The Blue is the part to 3D print
>
> [image: image.png]
>
> There are no sockets commercially available for this pitch and board
> thickness.  Currently, I am using an adapter soldered to the board. My
> adapter would allow removal of modules, and specific adapters for
> programming.
>  I would like the socket to be about the thickness of the Lithium Ion flat
> battery (6mm), but the plastic may flex too much for that unless steel pins
> are formed into the plastic .
>
>
> --
> George Bowden  250-893-7423
> Victoria BC
>


-- 
George Bowden  250-893-7423
Victoria BC
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