Battery Tester

Resistor R3 and potmeter VR1 form a voltage divider for biasing the base of transistor T3. when S1 is open, a very light load gets applied to the battery under test and the base of transistor T3 gets biased through VR1 and so keeps LED2 in the off state.

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Bibliographic Details
Published in:Electronics For You 2014-04
Main Author: Shukla, Yogesh
Format: Magazinearticle
Language:English
Subjects:
Batteries
Online Access:Get full text
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Description
Summary:Resistor R3 and potmeter VR1 form a voltage divider for biasing the base of transistor T3. when S1 is open, a very light load gets applied to the battery under test and the base of transistor T3 gets biased through VR1 and so keeps LED2 in the off state.
ISSN:0013-516X