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Build a Variable Voltage Reference
Nuts & Volts Magazine (February 2019)

Build a Variable Voltage Reference

By Jim Teixeira    View In Digital Edition  


A voltage reference is a zener diode-like semiconductor that produces an accurate fixed voltage; often, five or 10 volts. The downside to a voltage reference is that it only generates a single voltage and has limited current output. I decided to design a circuit that could generate any voltage between zero volts and 10 volts in 0.1 volt increments. Here’s how I constructed my variable voltage regulator.

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