It's indeed a DED box from Dunk converted to use with the UCC LCD which we all know is too large because of the PCB.
It's been a project ever since we started the UCC, but none of us really found the time to go further than prototype. When I saw Dunk ded boxes, I just knew it had potential and that was the spark that got me going.
Since the UCC team was aware of that problem since the beginning, a mirror option was created for the DED display so the text is correctly set when the DED LCD is reflected through a 45? mirror.
Work started with cutting the top of the ded box to place the LCD face down. Then a small piece of 4mm mirror was placed at 45? (couldn't find mirror smaller than 4mm thick)
Placing the mirror correctly required careful planning and precision work.
The bottom edge of the mirror was sanded at 45? so it rests flat on the bottom of the plastic box. The top edge of the mirror was left untouched and placed just against the LCD screen. Here is the initial testing on the top of the DED box with a mirror at 45?. The UCC PCB is still an old proto and will be replaced. The right picture shows the result of the reflected displays with the DED box closed
The problem of using a mirror and placing it at 45? is that the top and bottom edge will not reflect light normally because of the thickness of the mirror. To overcome the bottom edge problem, I made a 1mm trench on the lower part of the ded box so the non reflective part are left unseen.
the consequence is that the 5th line of the DED text is very low on the reflected light.
The ideal solution - as Biohazard found early in the development was to replace the 45? mirror with a prism that would prevent the reflections problems. But I have no access to such a prism.
The older proto PCB was replaced with a production PCB which is much smaller and fit perfectly in the back of the DED box. It's normally supposed to be soldered directly on the LCD PCB but I elected to use wires instead. The hardest thing to do was to remove the line connector on the LCD.
I also place black tape on the LCD that remains green and spoil the inverted text effect of the UCC DED.
Here's an image of the new assembly test. The pot will go on the outside of the DED box so it can be reached easily to set the LCD brightness.
Next the ded box was painted black inside and outside and all the parts were put together. Note the location of the brightness pot:
Closed box show the added width from the glareshield that i will have to use because of the PCB. I placed a plastic sheet on top of it to protect the PCB from the metallic glareshield, used 4mm plastic spacers to screw the DED box under the right glareshield.
I just need to stick the yellow sticker to place there and I'll be all set.
I will also place a 6mm high plastic strip above the DED to fill the gap between the top of the DED box and the glareshield frame.
Here's a very low quality image (couldn't use the tripod) of the final result of the DED that is almost as small as the original one.