Close

PCB Progress

A project log for PewPew Mini

The smallest PewPew of all PewPews.

deshipudeshipu 04/21/2019 at 22:565 Comments

I had some time over the holidays, so I made some progress on the PCB. A new footprint for the buttons and for the screen connector, routed everything except for the screen. Next I will need to add a truckload of capacitors for the screen, and bunch of vias for the display signals. I think I will go with SPI, because it's two resistors less, it's faster, and I have the pins for it anyways. The whole PCB is 32x32mm right now.


Discussions

Frank Buss wrote 04/22/2019 at 13:55 point

Is this stable? I know press-fit contacts:
https://www.mill-max.com/new_products/detail/164
They are pretty stable, sometimes better than soldered pins, because there can't be a cold solder joint and no solder joint can break, if there is mechanical stress at the pin.

I wonder if this works with standard pin headers as well, e.g. with 0.9 mm holes. But might be difficult to mount them. There are special tools for these press-fit pins and the thicker round cylinder after the square or hex pin helps to insert it exactly at the same depth for all pins.

  Are you sure? yes | no

John Loeffler wrote 04/22/2019 at 13:32 point

That is interesting what is the offset?

  Are you sure? yes | no

deshipu wrote 04/22/2019 at 18:08 point

I really have no idea, it's a core part in Fritzing.

  Are you sure? yes | no

Frank Buss wrote 04/22/2019 at 12:28 point

The pin header is drunk.

  Are you sure? yes | no

deshipu wrote 04/22/2019 at 12:37 point

This way no soldering required.

  Are you sure? yes | no