Other Parts Discussed in Thread: DLPLCR50XEVM, , DLP500YX
TI E2E Support,
My team partner and I are working on our capstone project using a pair of your DLP products, the DLPLCR65EVM Digital Micro-Mirror Device and the subsequent DLPLCR900EVM microcontroller. These products were ordered last semester in 2023 during part 1 of our capstone course, and were opened but not tested until recently this semester (2024), as this stage in our project had not yet been reached. We needed to build a custom 3-D model to properly hold and secure the DMD in place for proper use, which delayed us by a few weeks. However, once the model was finished and the DMD was tested for functionality, my partner and I found that the DMD's mirror angles were behaving strangely compared to my supervisor's older model, whose own personal work has been the basis of our project. The product numbers for my supervisor's older model is: DLPLCR50XEVM and DLPLCR900DEVM. The newer model, the one that my partner and I ordered for our project, is supposed to angle "on" and "off" mirrors to a 12 degree offset, which should cause an image pointing directly toward (normal to the screen) the DMD to reflect a total of 24 degrees in either the "on" or "off" direction. In our project, our DMD is placed in the 3-D model upright, where the screen faces horizontally along the x axis. We expected the 24 degree offsets to be horizontal as well, since our supervisor's older model also behaved this way. We are finding that our newer model is not; in addition to our model's "on" and "off" positions appearing much tighter than a 24 degree offset, the "on" mirrors reflect the image upwards at about 10 - 15 degrees, and does the opposite downwards reflection at 10 - 15 degrees as well. This does not appear intended, and I have included photos of our project setup as a visual aid for our problem description.
Our project setup is made with an image whose light is reflected from a high power flashlight; the image is fed through a bi-convex lens directly onto the DMD, according to the lens' focal length. The mirrors then reflect back through a 2nd convex lens onto a photoresistor sensor run by an Arduino UNO board. We had set up our project with the expectation that both our lenses could be placed at the same height for a horizonal reflection, but our second lens cannot quite reach the height required to accommodate for this unexpected behavior, and the lens cannot be angled downwards to receive the upward tilted reflection at 10 - 15 degrees.
Now my partner and I are not 100% sure if this is intended, but if this is a defective product, can my partner and I receive a replacement? These pieces of equipment were the most expensive of our project budget and we cannot complete our project without them.
Here are some photos for visual reference.
Finally, here is the purchase order made by a financial department staff through our supervisor
Cole Alldredge
