With all the exceptional LED projects we’ve featured, it’s amazing we haven’t published this one yet. Take some basic LED throwies (a magnet, an LED, and a battery) and place them into a stencil. Then, place the stencil on a pole and you can “write” any message you’d like and stick it on any magnetic surface. Full details can be found in the video above and detailed instructions are below (from their site):
- Buy LEDs in our store – Blue, Green, Red, White in multiple sizes.
![380295510_361d2f1512[1] 380295510_361d2f1512[1]](http://hacknmod.com/wp-content/uploads/2009/11/380295510_361d2f15121.jpg)
Materials:
- 1/2-inch, 3/16-inch and 1/8-inch foam core, preferably black
- 5-minute epoxy
- Clay
- Paint Edger attachment
- 15-foot telescoping pole
- A few hundred LED throwies
- Shrink Tube or electrical tape
Tools:
- An exacto-knife
- T-square/ruler

Instructions:
Above we can see the final product. The LEDs are positioned in the grid and the “artist” has the extension pole ready to place them on an unsuspecting build or overpass.
![nightwriter4[1] nightwriter4[1]](http://hacknmod.com/wp-content/uploads/2009/11/nightwriter41.jpg)
Above is the “stencil” to fill with LEDs for posting on surfaces. The yellow attachment on the left attaches to the pole allowing the user to post the message well off the ground.
![nightwriter6[1] nightwriter6[1]](http://hacknmod.com/wp-content/uploads/2009/11/nightwriter61.jpg)
Step 3 (shown above) demonstrates one method for shrinking heat wrap tubing and also an assortment of blue led throwies ready to go. For full instrcutions and detailed build photos, check out the project website.
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