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

[George Bowden]

Thanks for the offer Deid, but for the moment I am trying a different
approach.

After experimenting, and realizing that the tab of just 3.0 mm on the
card edge connector allowed for almost no thickness in the adapter,  I came
up with the following aluminum gadget to hold the wires in place while I
solder them to the fingers..
[image: 20230110_170554.jpg]

I push the module into the slot, which pushes the wires down around the
fingers.  I make a gap of 6mm in the wire's insulation where the wires are
pushed into the slot around the module where I'll need to solder.
 Double-sided tape holds the wires in place when I lay them out, and the
notches every 1.6mm help too.   After soldering, I'll cut the wires so they
dont connect the front side finger to the back side finger.

I need to buy more modules though, to try this latest method.  Here are the
ones I soldered without the jig,
The one on the left is an awful trial of patience and a waste of time.
The one on the right is easier to solder.  It uses the adapter provided by
Universal-Solder, but is thicker than I want it to be, and I put the pins
the wrong way up.
[image: 20230110_173508.jpg]

On Tue, Jan 10, 2023 at 2:40 PM Deid Reimer <deid at drsol.com> wrote:

> Hi George,
>
> I could probably print this if you send me the exact file you want printed.
>
> Deid
>
>
> On 2023-01-08 22:49, George Bowden 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.png
> > https://www.tinkercad.com/things/1hrF3ju8OWE
> > <https://www.tinkercad.com/things/1hrF3ju8OWE>
> >
> > It is a socket for holding one of these ESP8285 modules
> > image.png
> > https://twitter.com/esp8266/status/903774378042818560
> > <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.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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