timb 15 Posted August 3, 2014 Share Posted August 3, 2014 I’m working on an open test instrument platform for the BBB; in doing so I’m splitting it up into various sub-projects. I thought the community would be interested in the 5” LCD I’ve got going for independent use, so I plan on making a standalone cape for it, for those interested. The CircuitCo and 4DSystems 7” LCDs currently on the market both run at 800x480 and use standard 24-Bit Pixel Clock interfaces over. The CircuitCo LCD has a 60-pin ZIF interface, while the 4DSystems version uses the more common 40-pin ZIF connector. The difference essentially comes down to power: LCDs with 40-pin interfaces will run straight off of 5V, while the 60-pin panels require a bunch of voltage levels to be externally generated (+10, +15, -7 in the case of the CircuitCo panel). So, this got me thinking… There’s a plethora of 5” LCDs with an 800x480 resolution and 40-pin interfaces on the market. I figured as long as it used the same electrical interface and resolution, it should work straight off with the BB-BONE-LCD7-01 overlay (this is how the 4DSystems 7” panel works). As it turns out, I was right! Currently I’ve got the screen up and running with a standard 4-pin resistive touchscreen, however I’ve got a nice capacitive overlay on the way from China, which will be used in the final version of the board. Here’s a few pictures of the test setup up and running. The last picture is a closeup of the display, but it really doesn’t do the quality justice. Hopefully I’ll have the Cape done this week. If there’s any interest I’ll order a dozen or so boards and sell them to members at cost for testing. Rei Vilo and bluehash 2 Quote Link to post Share on other sites
bluehash 1,581 Posted August 4, 2014 Share Posted August 4, 2014 That is really cool! Thanks for sharing! I’m working on an open test instrument platform for the BBB; in doing so I’m splitting it up into various sub-projects. I thought the community would be interested in the 5” LCD I’ve got going for independent use, so I plan on making a standalone cape for it, for those interested. I'm interested in one! If you want I'm making a large batch for the 43oh store... and get a discount too. I can pay for your intial boards if you are interested. Would it be possible to send me links of the screens... to but a set. Quote Link to post Share on other sites
dpharris2 2 Posted August 17, 2014 Share Posted August 17, 2014 I am interested in buying one, and even in helping defraying costs to get this going. David Quote Link to post Share on other sites
bluehash 1,581 Posted August 21, 2014 Share Posted August 21, 2014 I am interested in buying one, and even in helping defraying costs to get this going. David Hi @@dpharris .. @@timb and myself are working on getting this fabbed. We'll have a Group Buy shortly for 5 boards. I'll put you down as the third person. Quote Link to post Share on other sites
timb 15 Posted August 23, 2014 Author Share Posted August 23, 2014 Okay, so I’ve been sick all this week, which seriously delayed things. The good news is that, during that time my sample display arrived from China. I just got all the measurements I needed from the FFC and am working on the PCB layout now. Basically I just have to add a few footprints, manually route the backlight driver, position the FFC connector and BBB headers, then I can let the auto-router handle the rest. (I’ll do a hand cleanup afterwards; I rarely use an auto-router, but in this case it’ll work well for getting the optimal positioning of the 40 signal traces.) Quote Link to post Share on other sites
timb 15 Posted August 24, 2014 Author Share Posted August 24, 2014 Okay, just a quick update, still working on the layout. I realized I hadn’t made a few of the part footprints, so I finished that up last night. I also ran into some difficulties routing the cap touch FFC, but I’ve found a solution so I’m working that right now! Quote Link to post Share on other sites
dpharris2 2 Posted August 26, 2014 Share Posted August 26, 2014 Hi @@dpharris .. @@timb and myself are working on getting this fabbed. We'll have a Group Buy shortly for 5 boards. I'll put you down as the third person. Thanks. Quote Link to post Share on other sites
dpharris2 2 Posted November 30, 2014 Share Posted November 30, 2014 Any advance on this project? David Quote Link to post Share on other sites
Rei Vilo 695 Posted December 2, 2014 Share Posted December 2, 2014 Any news from @@timb? Quote Link to post Share on other sites
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