We have a large gallery of drawings on our website: LightDoodles.com. There you will also find a description of how we draw and a brief history of light drawing.
Any light source can serve as your creative implement and we shopped for every keychain flashlight, gimick pen and light wand we could find.
But we finally sat down and asked what manner of flashlight would accomadate Lori's most natural and comfortable hand posistion while drawing in mid-air. The answer was to hold the light just like a pencil with instant on/off control directly under the index finger.
Since we wanted to complete each full drawing in one exposure, she needed to be able to switch between different colored pens quickly. We also found that when drawing a large picture we needed the light to be completely exposed on all sides to minimize fading around the edges.
With these parameters, I went hunting for parts at the local electronics and hardware stores and came up with what turned out to be a simple and versatile tool that resulted in some incredible art.
Step 1: Parts List
Plastic Tubing - 5/8" outside diameter - 1/2" inside diameter
Plastic Tubing - 1/2" outside diameter - 3/8" inside diameter
1 Normally Open Switch
1 20 ohm Resistor - size is determined using Ohm's law
3 1.5 volt Button Batteries
Heat shrink tubing
24 gauge wire
LEDs, switch, resistors, heat shrink and electrician's tape purchased at local electronics store.
The plastic tubing was "discovered" in the hardware store. Many sizes are displayed on spools which you purchase by the foot. The 5/8" outside diameter clear tubing best fit Lori's hand. The natural curve of the tubing turned out to be ergonomic and it helps keep the pens upright and stable when placed down.
The switch is a "Normally Open" switch which means the circuit is complete and the light is on only when the button is pushed and held down. As soon as the button is released, the circuit is broken and the light goes off. Otherwise, I chose this switch for it's size and shape, not for any of it's other electrical properties.
Adding a resistor to the circuit is good practice obeying Ohm's Law.