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Page 11 - The Top

The top part of the watch is fairly simple, especially compaired to the logic frame. in it rests the screen, 2 leds and a piece of clear plexiglass (optional). If you are using clear / opaque printed materiel, then you can simply place the leds behind the plastic. If you are using solid colors, you will need to make 2 holed for the leds to light through. As an overview, here's the complete top schematic:

The top Schematic:

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1.) Fit the plexiglass (Optional)

In the revised design, I added a thin (.7mm) plexiglass sheet on top of the glass screen. It's mainly to protect the glass. It never gets glued in, and is held in place by the OLED screen (letting you easily replace it if it get's damaged. The plexiglass comes with white plastic on both sides, we don't peel that off till the last moment.

Fitting the Plexi

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2.) Add 2 LEDs

The 2 leds are great for debugging, as well as providing visual indications without powering on the OLED screen. I use the Adafruit LED sequins as they include the needed resistor, are easy to solder, and come in different colors. You can mix and match. To install them, solder both negative ends together with wire. then run 2 leads from the positive ends (we'll tie those to output pins later) We then glue in both leds at about a 45 degree angle, or if you have made holes, line them up with the holes.

When placing the wires, make sure that the ground wire is on the right hand side (if you are looking down at the top). This will help it smoothly line up with the ground pin on the OLED screen.

Placing LEDs

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Make sure that you let the LEDs fully dry, and that you can easily run the wire leads around the OLED screen once placed.

3.) Cut ends off of OLED

I love the various screens Adafruit has. (I'm going to try a few different varities of watch screens in the future). The Monochrome OLED is one of my favorite. The one change needed to make it fit is cutting off 2 of the ends of the screen. There are no electronics here. I used a dremel tool with a cutting blade, but a small saw should work also. The highest risk is breaking the glass that is right next to where you have to cut. Doing so will render the screen useless.

Screen: Before & After

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4.) Install Screen

To install the screen, make sure the wires from the LEDs are kept completely flush with the edges of the top plastic. (Some superglue will keep them in place) Now, remove the white plastic from the plexiglass sides, and place it in the screen area. (NO GLUE) Now remove the protective plastic from the OLED and place it in. Apply glue sparingly in 4 corners of the screen where the OLED board meets plastic. Go sparingly with the glue. As superglue dries the vapors can cover things with a fine coat of white. This can ruin the screen and plexiglass.

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Be careful not to use too much glue. As the glue dries, the vapor can spread and cover the screen or plexiglass with a white film!

Assembly

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Now let it dry and you have completed the top section, and the last of the 3 main sections.

Complete

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Next Page - Final Assembly

The Build