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

[George Bowden]

This is about the minimalist wifi ESP project that logs data to a host and
then deep sleeps
And in case you were missing my spreadsheet... (Sorry, no coroplast in this
yet,though it may make a good base <grin>)

[image: image.png]

On Sun, Jan 8, 2023 at 11:20 PM George Bowden <gtbowdeng at gmail.com> wrote:

> 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
>


-- 
George Bowden  250-893-7423
Victoria BC
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