First off, there's good news and bad news.
The Bad News
The bad news is that we've lost a couple of weeks because we had to do another iteration of the driver board. The reason for this is that the previous board was not ready for pick-and-place production. A couple of pads needed adding to make that possible. And it's not wise to go into production on a new board layout without testing that it works. Obviously, having said, in the previous update, that we'd frozen the hardware, we had to back-track, and that makes us look silly. But that's life!
The Good News
The good side of this is that we had the engineers fix the power circuitry, so that we can use the 5.2V, 2A micro-USB PSU, as originally intended. A few of you wrote back after the last update and asked us to take the extra time to fix the issue. As it happened we had no choice, so we did it anyway. Happily though, it only took a couple of weeks this time, and it's all looking good and working well now. So what of the rest of the project?
In That Case...
Paul, Jon and Rory have been hard at work on the case design and preparing for production. The design is almost finalised. The materials are ordered. Having seen what they look like, we opted to go with a coloured back for the coloured cases. Those who chose colourless will obviously have a colourless back. We think they look great. There will be a bezel with the final version (you can choose whether to fit it or not).
Sadly I don't have enough LCDs to assemble one of each. I also don't have the right bolts, so have had to improvise on this one with ordinary nuts and bolts. The chosen bolts for the final production HDMIPi are domed, black with a 2mm hex socket head. We will be providing an hex key (Allen key).
1: I had to improvise here and counter-bore with ordinary nuts and bolts. The final edition will have standoffs and black, hex-head bolts, like this...
2: Keyholes included, as per suggestion from you guys (thanks Aymerick Dupouey) :) There will also be VESA holes.
3: There will be holes for mounting the Pi camera somewhere around here
4: We may have a small bridging piece here that people can 'knock out' if they choose.
5: In the unlikely event of needing Pi composite and audio ports, you can hack the case to remove these parts. I can't see why you'd need to, but we all have different requirements.
The USB lead and HDMI connector in the photo are the ones selected for the final product. It turned out that the noodle cables we originally envisaged were unsuitable.
Available Hack Space?
The available space in the back of the case will be approximately 5cm x 14cm x 1.2cm. Some people want to put other things in their cases. It should be possible to fit a couple of Amp.hours worth of lipo battery and a regulator in there, if you want to do that. The ribbon cable tucks nicely out of the way. There's a neat little assembly trick I figured out to get it right out of the way. I'm hoping to do an assembly video when we get the final parts.
You Can Even Use Add-on Boards With It
The up-side of having the case as thin as we could get it is that you can easily and conveniently fit your existing add-on boards to the Pi, like this...
This is a feature that I am particularly pleased with as it makes the HDMIPi so versatile. The above board is a RasPiO duino board which will be available soon (I'll have a few Beta boards for sale at tomorrow's CamJam if you're going.) The board below is a RasPiO Breakout, which is great for general GPIO work.
Yesterday Dave collected what we think is probably the final case prototype, which I will see tomorrow. I'm excited about that. If it's all good, the Pimoroni crew will be starting to laser cut the cases next week.
Now we have final case dimensions, (~230mm x 150mm x 24 mm) the bezel prototype has been ordered. We're looking forward to seeing that soon.
Cambridge Raspberry Jam
Alex will be at the Cambridge Jam on Saturday. The toxic cased HDMIPi in the photos above will be there with him, as will the hacked orange UNICEF edition HDMIPi he blogged about earlier in the week.
RasPi.today Podcast Interview
Russell Barnes, ex editor of Linux User and Developer, interviewed Alex about HDMIPi a couple of weeks ago. This will be published as a podcast at midday UK time on Friday 4th July (today) at RasPi.today
63 Surveys Still to Come In
There are 63 of you who haven't yet responded to the survey. Are you one of them? If so, please log into your Kickstarter profile and complete the survey. We have not yet frozen address changes, and will do that at the last possible moment, to allow for people moving.
When Will I Get My HDMIPi?
This is what you obviously want to know. The driver boards are being ordered today. The LCDs were formally ordered by us last week. Our supplier ordered them from the manufacturer a few weeks ago.
If all goes well with driver board production, we hope to be able to start shipping HDMIPi within 4-6 weeks.
That's about it for now. We wish you a happy weekend, and a happy 4th July to those who celebrate it. :)
Alex and Dave http://hdmipi.com Occasional micro-updates (usually photos) on twitter... @hdmipi