LED as Zener diode. Design Note 37


LED-as-Zener
What will do if you want a low voltage less than 3 volts as reference voltage for a circuit? Usually we use a low volt Zener to give low voltage to a particular section of the circuit. But Zener below 3.1 V is not available. So do this simple method. The LED can act a Zener to give a reference voltage. Each type of LED has a forward voltage drop that range between 1.7 V to 3.3 V. This forward voltage drop slightly increases when the input voltage increases. This is due to the increase in the luminosity of the LED. So let us exploit the LED to do the job of the Zener.
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Dental Curing Light. How Stuff Works


Dental-Curing-light

Dental curing light is used by the dentists for treating tooth cavities or filling root canals. The therapy involves the targeted action of high intensity light such as UV light to generate heat by concentrating it in the target area. To fill the cavities of tooth, adhesive chemicals such as polymer resin is used which is compressed in the cavity using the UV light. The compression makes the adhesive completely adheres to the inner surface of the tooth .With the introduction of LED curing light, comfortable dental therapy is now possible without generating heat.

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Familiarize Electronic Components Part III – LED


This part is colourful because it deals with LEDs. LEDs are seen everywhere from indicators to room lighting. It is popularizing due to its long life and low current consumption. Power loss through heat generation is practically nil in LED. It operates in low voltage and low current and is the inevitable part of an electronic gadget.

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Dental Curing Light


Dental curing light is used by the dentists for treating tooth cavity or filling root canal. The therapy involves the targeted action of high intensity light such as UV light to generate heat by concentrating light in the target area. To fill the cavity of tooth, adhesive chemicals such as polymer resin is used which is compressed in the cavity using the UV light. The compression makes the adhesive completely adheres to the inner surface of the tooth .With the introduction of LED curing light, comfortable dental therapy is now possible without generating heat.

Continue reading “Dental Curing Light”