Variable Voltage Regulation
Circuit by Ron J
Text by ANC
Notes:
As Ron suggests, controlling the output voltage from a regulator can be made variable in three ways:-
1. Using a fixed reference zener diode to increase the output by the value of the zener
2. A variable resistor for variable output, note that a voltage less than the nominal regulator is not possible
3. A chain of diode such as 1N4001, this increases the output by +0.7 V for every diode used.
Source:www.zen22142.zen.co.uk
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