Question about Electronics - Others
Since your question is not very informative on a specific problem, I can only answer as to how a light works in general. In Power supplies, there can be 3 different types of lamps used. These are used as indicators to signify an "on" condition. Type 1 is Neon and upon analysis typically has 2 rods running parallel to each other. A Neon lamp will fire at about 60 volts. These re usually constructed with a dropping resistor that will limit the current and thus drop the voltage from about 120v AC to the required voltage for operation. The second is Incandescent. These lamps have a filament which glows when power is applied. They are available in all shapes and sizes and can operate from about 3 volts up to 120 volts, ac or dc. The third is the LED (light emitting diode) These last the longest of all the indicators and are the most efficient as well as lease expensive. They are available in almost any color and will operate with as little as 1-1/2 volts dc.
Posted on Nov 07, 2010
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Posted on Jan 02, 2017
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