Soronlin

A handy page to collect some resources for the Raspberry Pi single board computer.

Beta Board, Perspective-corrected Images

These are perspective-corrected images of the beta boards which can be used to take measurements from. I estimate that they are accurate to within 1mm.
Note that most printer/program combinations will not print them the correct size, even if you tell them how big you want them. You will need to do some test prints and scale them by trial and error. You need them to print exactly 85mm by 56mm.

Note that these pictures cut off the connectors at the board edges. To determine where to place cutouts for the connectors, use Gert's mechanical drawings. You should use these images solely for determining where to place support structures.

I intend to use polystyrene sheet to make the box, and this is the support structure I intend to use:

It uses two structures: one is a shelf 20mm x 5mm on the corner of the board, the other is a bar shaped like this and placed 25mm in from the other end of the board. That's a measurement to the bar, not its centre-line.

Note that the tops of those pillars should be padded, since there are PCB traces under it, and the padding must be taken into account when determining the height of the pillars.

In order to hold the board in place there should be another pillar bearing down on the board from above. A suitable position is above the support bar and also 25mm in from the top edge (with the video and audio connectors.) Almost directly above the Raspberry Pi logo. When the case is closed the top pillar and the bottom pillars should have a vertical gap of around 1.6mm between them (plus solder-resist and silk-screening). Remember that this should allow for compressed padding on all pillars.

In the end, the real test is if the board is held securely without flexing.

Here's another idea: two scraps of perspex and a handful of nylon spacers (25mm x M3. The PCB supports are 15mm(top) and 6.4mm(bottom) with 1mm of padding)

From: moc.udanax|rekrul#moc.udanax|rekrul (Lurker at the Pleasure Dome)
Date: 3 Nov 90 18:56:01 GMT

This reminds me of a story from the dark ages of computing - when the Computing Center at a major university had both a monopoly on computing resources and a policy of "no frivolous use of the computer(s)".

Here are a few stories that I have gathered over the years. Since they are getting harder to find it is obviously my duty to provide another back-up.

This page is Copyright (c) 12 September 2004-2011 by Richard Urwin. All rights reserved.

Here are some ideas, probably patentable, which I have no intention of patenting.This page exists to record these ideas as prior art. If you want to implement them then please do so. A nod in my direction would be appreciated. No patent search has been done, so I do not certify that these ideas are indeed patentable. I specifically refuse you the right to patent them.