Voltage Regulator For Cars And Motorcycles

This regular circuit can be used on an alternator that has one field terminal grounded. When +V (input) gets too high, Q1 conducts, and the base of Q2 is driven toward ground, reducing the voltage fed to Q3. This lowers the voltage fed to the field of the alternator.

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Voltage Regulator For Cars And Motorcycles - Circuitos de Electronica