Automatic Emergency Lighting Unit


Posted on Dec 17, 2012

This unit uses a Nicad battery to provide power to an emergency lighting setup. When power fails, T1 beco


Automatic Emergency Lighting Unit
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mes forward biased, which lights LI and L2. The batteries are normally kept charged. When power is on, T1 is cut off and it keeps the lamps extinguished.




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able utopia   Oct 11, 2017

Will not work as intended and described. T1 is always forward biased and fed either from the battery or the line supply. Besides, the charging of the battery is totally uncontrolled and unprotected. Poor practice.

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