 |
- A small plastic cup (for example, a nut cup, a clean cough medicine dispenser, or plastic drinking cup)
- Sandpaper
- Scissor or utility knife
- Cricket
- Tri-color LED
- Sensor
|
 |
 |
Choose a small, clear (or nearly clear) plastic cup. |
|
 |
Sand the inside of the cup with sandpaper. |
|
 |
Here are two cups, one before sanding (left) and one after. After you sand the cup, the inside of the cup will have a scratchy texture and be nearly white and not as transparent. |
|
 |
Next, make a base for your nightlight that will hold your tri-color LED. I used another small plastic cup. I cut off the bottom of the cup, set it upside-down, and cut out a notch for the wires. |
|
 |
Here's how the tri-color LED sits on the base. |
|
 |
Now set the sanded cup over the LED. You can tape or hot-melt-glue it in place. (In this photo, the LED is on - in a dark room, the tiny LED will light up the whole cup!) |
|
 |
I programmed my night light to come on when I turn out the light and to change colors. When the night light first comes on the colors change rapidly. As time passes and I fall asleep, the colors change more slowly and eventually stop.
Here's a bit of sample code for Cricket LogoBlocks. Here's a bit of sample code for PICO Blocks. |
|
 |
Here's my nightlight in action. It is amazing how such a tiny LED inside a plastic cup can make such a beautiful little light! |
|
 |
Decorate the outside of your nightlight with a permanent marker or with paper cut-outs. |
|
 |
The city at night night-light! |
