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From: firstname.lastname@example.org (Peter Jeffe)
Subject: translate input resistance to output resistance
Date: 11 Nov 2002 10:28:07 -0800
NNTP-Posting-Date: 11 Nov 2002 18:28:07 GMT
I posted this to s.e.basics but haven't gotten a response, so maybe
it's not as basic as I thought. Hopefully someone here will be able
I want to convert the resistance generated by my car's steering-wheel
controls for the factory stereo to different values for an aftermarket
stereo. So I want a circuit that takes a set of input resistances and
"produces" a different set of output resistances.
There are six control switches that form a resistor bridge and
generate a resistance of from 82 to 1474 ohms across a single output
wire. For each of those six input resistance values (and maybe more,
from two switches being pressed at once) I want to be able to
"convert" it to a specific value in the range of about 2k-24k. The
voltage being put across the resistor bridge is 5 VDC.
In other words, I want something that behaves as follows (with example
Input Ohms Output Ohms
You get the idea: there's no relationship between the input and output
resistances, so each value translation has to be discrete. All I can
come up with is some combination of transistors bridged in parallel
and series to get the desired result, but I'm hoping there's a simple
analog switch-type circuit that can be configured to produce this.
Thanks for any help.
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