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Subject: Re: help with LED switch

Date: 04/16/01 at 7:14 PM
Posted by: Ray Rogers
E-mail: rrogers@plaidheron.com
Message Posted:

In Reply to: help with LED switch posted by Paul on 04/10/01 at 3:09 PM:

You might try a quad comparator like the LM3302 from TI; it seems to have a good supply and common mode range. There was a company in the Los Angeles that made resistive strips whose resistance varied, more or less, logarithmically with pressure. I can't seem to locate them right now.The idea is to set up a fixed resistor divider chain to one side of the comparators and to use the variable resistor as the leg of a voltage divider and hooking it to the other side of the comparators.You might do it with uP-AD etc... but it hardly seems worth the trouble.Ray


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