A Look Inside #1 - Emergency LED Light

Teardown of an emergency LED light. An explanation of the circuit, a look at the diode bridge rectifier wave forms on an oscilloscope.
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I take apart an emergency LED light as it no longer seem to work. I want to use it as a warning system when the power grid fails so I know when we are running on our Victron Energy inverter and batteries.

Other items or topics seen or mentioned in this video:

How does a full wave bridge rectifier work?
How does a filter / smoothing capacitor work?
Rectification wave forms on a UNI-T UT81b Scopemeter / oscilloscope.
Cheap lead acid charging circuit.
Replace battery with hybrid capacitors
Fluke 287 / 289 used to measure peak to peak AC wave form.
How to use a 555 timer IC to blink / flash the LEDs to make them more power efficient.
Transformer ratio / step down
Relay and resistors
Fluke 115
Agilent U1272A

Diode bridge rectifier:
http://en.wikipedia.org/wiki/Diode_br...
A diode bridge is an arrangement of four (or more) diodes in a bridge circuit configuration that provides the same polarity of output for either polarity of input. When used in its most common application, for conversion of an alternating current (AC) input into a direct current (DC) output, it is known as a bridge rectifier. A bridge rectifier provides full-wave rectification from a two-wire AC input, resulting in lower cost and weight as compared to a rectifier with a 3-wire input from a transformer with a center-tapped secondary winding.