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Elecraft Series no.20
Line Tracing Snail Kit
Item No: 75020



Snail follows the line!
The Line Tracing Snail uses a special LED sensor to detect a black line (magic marker, etc.) drawn on a white background. It uses two small motors and rubber tires to slowly but surely move forward and turn. The body of the snail is made of transparent (HIPS) plastic to allow viewing of the intricate mechanisms inside.

How does it work?
The snail emits an infrared light from the Light Emitting Diode on the underside of its chassis. A photo transistor picks up the reflection of the infrared light to distinguish black from white surface. Transistor sensitivity can be adjusted to adapt for a variety of paper sizes and line widths.

Specifications
Height: 176mm Chassis material- ABS plastic Two Type 130 motors (sensor unit and motor come pre-wired). Uses two R6/AA/UM3 batteries (sold separately).

Drawing a course for your snail
Draw a line on a white surface with an oil based black pen. Tamiya Paint Marker is ideal. Draw curve radius over 8cm, line width over 3mm.
*Strong sunlight or lamp light may interfere with sensor. Please use product indoors or in shady areas. Adjust transistor sensitivity and line width to best suit snail running environment.

Specifications are subject to change without notice.