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I want to get 1.8v to power a gps unit, from the 5 volt pin of an Arduino.
What do I need to change on this schematic to achieve that voltage?
Have R1 as a 500Ω resistor and R2 as a 220Ω resistor.
That should give you 1.7999999999999998 volts.
For the LM317, Vout = 1.25(1 + R2/R1)
Using R1 = 220 ohms and R2 = 100 ohms, Vout will be 1.82 volts
Required, but never shown