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Small HDMI screens are  expensive. Native HD ones are astronomical. We want to drive the price down "Raspberry Pi" style.
Small HDMI screens are  expensive. Native HD ones are astronomical. We want to drive the price down "Raspberry Pi" style.
Small HDMI screens are expensive. Native HD ones are astronomical. We want to drive the price down "Raspberry Pi" style.
2,523 backers pledged £261,250 to help bring this project to life.

The Good, the Bad & the Toxic


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).

HDMIPi in Toxic Yellow case
HDMIPi in Toxic Yellow case

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).

HDMIPi case Rev 4 Rear
HDMIPi case Rev 4 Rear


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...

Hex head bolt and stand-off
Hex head bolt and stand-off

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...

RasPiO duino on the back of HDMIPi rev 4 case
RasPiO duino on the back of HDMIPi rev 4 case

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.

RasPiO Breakout on the back of HDMIPi rev 4 case
RasPiO Breakout on the back of HDMIPi rev 4 case

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. 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

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 Occasional micro-updates (usually photos) on twitter... @hdmipi


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    1. Missing avatar

      Rumour on

      No rush! I'll have a look when my HDMI Pi arrives, but I'll probably wait for an official B+ back instead of taking a hacksaw to the case!

    2. Alex Eames - RasPi.TV 8-time creator on

      @Rumour we haven't started with the B+ back yet. It's more important to us at this stage to get the cases made for the model B. We will get to the B+ back in time. :)

    3. Missing avatar

      Rumour on

      I ordered a B+ this morning! Although I also ordered a case for it as well so it won't be going into the HDMIPi.. although the extra USB ports would be useful so I don't have to lug a USB hub and additional power supply around as well...

      Other than cutting out the space for the USB ports are there many changes that would need to be done to the back? I see the A/V out on the B+ is a lower profile so shouldn't need a hole cutting for it.

      Looking at the pictures above the USB power lead might be a bit fiddly, but I do have some short straight leads that would probably work as the B+'s power connector is now on the same side as the HDMI port.

    4. Alex Eames - RasPi.TV 8-time creator on

      @Eric We've known about this for a while. All HDMIPi cases will ship with holes for mounting the B+ but there will need to be a new back plate as the HDMI connector position means the Pi's position is shifted. But, since nobody who backed the KS has a B+ yet, all HDMIPis will ship with the back to fit the existing model B. A new back will be produced soon and marketed separately. You cant really have a 'one back fits all' or it would be one great big hole. :)

    5. Missing avatar

      Eric Limpens on

      As the model B+ is hitting the news (and hopefully the shelves soon), the question is:
      will the B+ RPi fit into the back of the display?

    6. Missing avatar

      Walter Herdin on

      hi Alex!
      this would be great!
      I'll send you a mail to discuss further details!

    7. Alex Eames - RasPi.TV 8-time creator on

      @Walter I think Dave bought two sample resistive touch overlays. If you want one of them, I'm sure he would sell you one.

      As regards CAD, I'll ask the question of Paul and the guys.

    8. Missing avatar

      Walter Herdin on

      Sounds good! Looking forward playing around with it.
      2 questions:
      o) Any info about bolt on touchscreen options yet?
      o) Can you provide us with a CAD placeholder of the case? (something simple but with exact measurments)

      Thanks a lot!

    9. Kevin on

      Thanks for the update and happy 4th! HDMIPi is going to be great!

    10. Missing avatar

      sgllama on

      "And it's not wise to go into production on a new board layout without testing that it works."
      rarely was a truer word spoken. Thanks for keeping us up to date.

    11. Alex Eames - RasPi.TV 8-time creator on

      @Roger LOL yeah!

      @Trevor not sure, possibly, unable to commit at this time, but I think it might be. There is a precent there with the Pibow after all.

      @Richard You sound like exactly the kind of person who will enjoy the hackability of this case. I couldn't find 3mm bolts long enough last Friday night, so set up the pillar drill and counter-bored. With a nice sharp bit, it machined beautifully. I've heard if you rout perspex you should use a small multi-fluted bit at low speed, but not tried that yet. We're glad the power circuitry works as it should now too.

    12. Missing avatar

      Richard Jackson on

      R.E. Good news/bad news. From what I can see it's all good news. Like many other folk I'd rather wait and have it right than have it sooner and make do. Case looks great - if it needs modification when it arrives? Well, I have opposable thumbs and a reasonably well developed brain pan. Hacking the case is part of the fun surely - and it's only perspex, not like it will be difficult. Anyway, many thanks for the usual detailed update - and to reiterate, from my view point it's all positive.

    13. Missing avatar

      Trevor Landon on

      Would it be possible to get the cut pattern for the case? It will be a good starting point for anyone who wants to make modifications to any of the pieces.

    14. Roger Sharp on

      Functional crap though! And easy to replace for a shiny new bit.

    15. Alex Eames - RasPi.TV 8-time creator on

      @Andrew The LCD screen itself is fully enclosed apart from the slot for the ribbon cable, but if you want to keep your contents dust-free, tape would do it. I think it would look 'a bit crap' though ;)

    16. Andrew Scheller on

      @Alex I'm purely thinking just about keeping dust out, doesn't need to be particularly strong ;)

    17. Alex Eames - RasPi.TV 8-time creator on

      @Andrew it's 1.2cm, so I guess so. Sellotape though? ;p We think the camera market would like an enclosed case, but that's another project.

      @Johan One thing I've learnt from this whole experience is that people like to know what's happening, even if it's not good news. It's horribly uncomfortable for us, but somehow it feels like the right thing to do because you all put your faith in us and gave us the money up-front. :)

    18. Missing avatar

      Beat on

      Thanks for your update, and sound decisions!

      1 little suggestion regarding "annotation 1: black, hex-head bolts, like this":

      Would it be possible to have the bolts not "standing out" of the back pannel, so that it can be really flat ? together with the wall-mount-fixtures it would make lots of sense to have those bolt-heads flat instead of bobmed, with a space in the plastic to hold the heads.

    19. Johan Knutsson on

      The more pictures I see, the more excited I get :), really appreciate the openness of your updates and as has already been mentioned I'm much happier with an excellent product with some delay.
      Keep up the good work!

    20. Thomas Humphrey on

      @Alex - Have sent you a message

    21. Gary Littlemore on

      @Alex my bad, I forgot the driver board had the audio port too. Ignore me, it's been a long week.

    22. Andrew Scheller on

      Appreciate that you can't please all the people all the time ;-)
      Is the gap between the front & back layers small enough that it could be covered with a long strip of sellotape?

      I'll keep an eye out for the flat-back-piece addon after all the HDMIPi boards have been shipped. I guess (if you had the right standoffs) you could even add the flat-back "on top" of the current back, making it a triple-layer sandwich? ;)

    23. Alex Eames - RasPi.TV 8-time creator on

      @Andrew It's not like we haven't thought about this. How would you do it? It has to be open on the driver board side, it has to have opening for Pi ports. This is the best we've got. Adding extra layers makes it heavier too. Small, portable, cheap & HD is what HDMIPi is all about.

      I expect there will be an option to extend as an aftermarket accessory. Just a flat back piece and longer standoffs. But it won't be standard. Whatever design decisions we take, some people will like and others won't. Not much we can do about that, I'm afraid. :( But the design is easily hackable :)

    24. Andrew Scheller on

      Not too sure I'm keen on this 'open frame' case design - I'd always assumed that it'd be more 'enclosed', like the original PiBow inspiration?

      And as I commented on a previous update, I'd still like an option with a slightly thicker case and a completely flat / covered back.
      But I can see the exposed GPIO header will be really useful for people who need that feature :)

    25. Alex Eames - RasPi.TV 8-time creator on

      @Thomas send me a private message and we'll see what we can do. We have already purchased the case materials, so won't be able to allow a lot of people to switch at this point.

      @Jamie Thanks :)

      @ender Pretty much because that's what we chose.

      @Gary I don't understand what you mean. If you mean the audio port of the Pi, the better quality HDMI sound is broken out to a 3.5mm stereo jack on the driver board on the other side of the case. You can't use both at once, and the HDMI sound is better, but you can hack your case if you insist on using the Pi's audio out. :)

    26. Andrew Scheller on

      @Gary the driver board contains a separate audio out, extracted from the HDMI signal.

    27. Gary Littlemore on

      Alex won't the audio port need to be clear of the case? How else are we able to get sound out of it without plugging in a jack?

    28. ender on

      Hex bolts? Why not torx?

    29. Jamie Whitehorn on

      +1 for all of Roger Sharp's comments! Couldn't have put it better myself :-)

    30. Thomas Humphrey on

      Thanks for the update. I know it's late but would it be possible to change the colour of mine? Also when are we going to be able to order another? (I might have another project in the works) Many Thanks and look forward to seeing this in the flesh!


    31. Alex Eames - RasPi.TV 8-time creator on

      @Aymerick It was a great idea and it _HAD_ to be done. I will probably end up with them on walls all round the house now ;)

    32. Aymerick Dupouey on

      Oh, well thats awesome to be mentioned in your update :D
      Thanks guys for your amazing work, can't wait to get my hands on it !

    33. Roger Sharp on

      Good decisions. Thanks for the detailed update.
      Of course the delay will cause a bit of disappointment, but in my view "Excellent but a month later" beats "Fairly good and sooner".
      I really like the way that there is space for the extension boards, and maybe a portable power pack.

    34. Alex Eames - RasPi.TV 8-time creator on

      @Philip send me a private message and we'll see if we can accomodate you :)

    35. Missing avatar

      Philip Wong on

      Thank you for the update! The enclosure and its color is very nice! May I ask if I can change my mind of color? I hope it's not too late as some backers haven't decided their color as well. :)