DC-PSU using an LM317 and individual Resistors instead of a Pot.
An incredibly simple circuit built around an LM317 Voltage Regulator. Variable output, using not a pot-meter but a selection of six individual values for R2 instead. This makes the output more reliable and steady than when using a potentiometer.
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PSU DC POTLESS LM317 POWER IC
Creative Commons Attribution-ShareAlike 3.0 / CC BY-SA 3.0
Published: October 5, 2019 Concept
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