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Linearly variable power supply

Based on a Labs project | October 2011 | Find it here
Linearly variable power supply
In most variable power supplies, the correlation between the setting of the wiper of the relevant potentiometer and the output voltage is non-linear. This results in the output voltage either having to be measured or indicated on an integral meter. If the relation were linear, a simple linear scale on the potentiometer would suffice.
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