TI E2E Community
DLP & MEMS
DLP LightCommander Development Platform
Flex cable between DMD and controller board
We need a flex cable between the the control board and the DMD board (like using the edge-card connector)? Can you suggest any solution for that?
Also, as I understand you have tried ~40cm cable between DLPC200 - DLP5500 and it worked well. What kind of flex cable did you use, and how can we get that cable (specifications,order info)?
There is an App Report on this very subject. It is available at: http://www.ti.com/litv/pdf/dlpa028
These flex cable extension assemblies will be available for purchase. I will get you information about that shortly.
Thanks for your prompt response. Actually that will be perfect to provide me with the purchase information for these cables.
We need to rotate the DMD chip set ~45 degree so that the mirrors' rotation axis will be parallel to the surface. The reason for separating the DMD from the controller board is to rotate the DMD easily. Are these cables flexible enough to do that?
Also, is there any other solution to rotate the DMD except rotating all the DMD+Controller board (not stable enough)?
You mention rotating the DMD+Controller board by 45 degrees. If you are not going to use the LightCommander optical/illumination system, then it is quite possible to mount the controller board at a 45 degree tilt, with the DMD board plugged in, and secured by a suitable bracket. This can be done very stably. In fact I have one setup this way.
As for the flex cable, this is also an excellent way to achieve some decoupling of the mechanics between the controller board and the DMD board. The flex cables are pretty thick, but they are certainly flexible enough to allow the rotation by 45 degrees.
I mentioned about purchasing these assemblies. We are giving serious thought to making the assembled flex cables available through the TI eStore. They are not available at this moment. Check back after the beginning of the 2nd quarter.
Are there others reading this forum who would be interested in these flex cables for extending the DLP5500 DMD from the LightCommander controller board? We would like to get an indication of the interest in obtaining this part. Please post here to let me know.
Thanks for your helps. Actually I can mount the controller board+DMD at a 45 degree tilt but the DMD chip is not fixed to anywhere (it is shaking in plug and not stable).
Also, is the fan for the power supply also responsible for the DMD cooling? Can I just separate the DMD from the fan?
Could you please give me more details about mounting the DMD+CB at 45 degree tilt?
Are the flex cable assemblies available yet for purchase? We are a potential customer over here on the East Coast at NASA.
Hello Damon. Welcome to the DLP E2E forum.
Thank you for letting us know of your interest in the LC flex cable assembly. We have these ready to go - but have had a delay getting them up on our eStore (a matter of having a certain certification [REACH] which we didn't know we needed when we built the assemblies). Please give us another few days to see if we can work through the issue. We are close to having this resolved, and hope to have them available very shortly. Thank you for your patience.
Thank you Pascal.
I noticed that on your eStore the DLP5500FLEX was listed as (PREVIEW). Thanks for the explanation. Please let us know the moment that the issue is resolved. We're working on a project that has time-sensitivity related the procurement of this part.
Any updates? Are there any alternative methods for purchasing this part directly?
The last sign-offs are being done today. I expect the flex cable assembly to be available from the TI eStore by the end of this week.
If you are interested in a solution beyond the original LightCommander control electronics, we were able to design a cable interface on our X3-PM55 that we've successfully operated unto 24" in length. Longer lengths may be possible but we have not seen the interest to go further.
- Adam Kunzman
Keynote Photonics (www.keynotephotonics.com)
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