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Help wanted: watch bands, spacers, nuts, screws

A project log for Open Hardware Summit 2020 badge

Wristwatch form-factor conference badge

oshparkoshpark 01/23/2020 at 19:044 Comments

@Kevin Walseth at Digi-Key has gotten us all the electronic components that we need.

But we also need:

Watch Bands:

I ordered this from Amazon for Michael:

CIVO NATO Strap 4/8 Packs - 16mm 18mm 20mm 22mm 24mm Premium Ballistic Nylon Watch Bands Zulu Style with Stainless Steel Buckle

It is a 4 pack of 22mm NATO bands for $13.99. That is $3.50 each.  This seems not be a good value.  We need to source 300.

Standoffs:

@Michael Welling found these 7mm standoffs on Amazon but quite expensive

(1000 pcs) M3-0.5 X 7mm, Hex Female Standoffs, Metric, 4.5mm Across Flats, Aluminum

That is 1,000 pieces for $160.  $0.16 each.  We need 4x 300 so 1,200.

Also, we not certain what standoff is best.  We are making a "sandwich" with top PCB, LiPo battery and bottom PCB:

Discussions

oshpark wrote 02/05/2020 at 16:21 point

  Are you sure? yes | no

oshpark wrote 02/05/2020 at 11:29 point

I have been discussing that with @Michael Welling and @Alex Camilo 

maybe 7mm

  Are you sure? yes | no

AVR (lordKiCAD) wrote 01/24/2020 at 00:29 point

what dimension do the spacers need to be ? I can design some then print a few batches everyday leading up to the con or whatever date you have in mind.

  Are you sure? yes | no