Subject: 2.6 Can I make my own sensors?
Content-Language: en
Topic-Level: 0
Revision: Robert Munafo, 1999-07-13
Location: /robotics/rcx/
Comment: Topic-level is inaccurate pending a reference for topic
levels
<p>Yes. Sensors must be resistive elements, capable of taking 9 volts in
either polarity (in case they're connected "backwards") and may
present a resistance of anywhere from 0 ohms to infinity. The
effective useful range is from 0 to about a million ohms. It's linear
from 0 to 10,000 ohms, then starts to go exponential. A resistance of
10,000 ohms gives a reading halfway between 0 and 1000 (which is the
reading for infinite resistance). A detailed table is at: </p>