Showing posts with label photo. Show all posts
Showing posts with label photo. Show all posts

Monday, October 13, 2014

Infrared Light Photo Detector Circuit This is a basic infrared light photo detector circuit In this circuit the light falling on the phototransistor

Infrared Light Photo-Detector Circuit

This is a basic infrared light photo detector circuit. In this circuit the light falling on the phototransistor will be from an Infrared Light Emitting Diode (IrLED) but otherwise it is the same as the phototransistor circuit shown above.

 When the light falling on the phototransistor (Q1) is blocked, its conductance will decrease and the voltage across Q1 will rise. When the voltage rises above 1/2 of the supply voltage the output of the comparator will turn ON and the LED will be lit.


Source: Infrared Light Photo-Detector  
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Thursday, September 11, 2014

Simple LED Photo therapy Wiring diagram Schematic

This Simple LED Photo-therapy Circuit Diagram is used for therapeutic phototherapy. Light at the correct wavelength can be effective against depression and allergies. There are a wide range of products on the market, dear, they are presented as remedies for dust allergy, fever etc.. If we look at these devices in more detail, we see that the operation is relatively simple to explain. 

Common to all devices is that they emit deep red light with a wavelength of 660 nm.Some of these devices to claim phototherapy light of 660 nm can have a positive effect on the human body and can initiate curing processes. This is so-called "phototherapy" is a treatment which is claimed to have an effect against allergic reactions in the body, as it acts against oxygen free radicals and strengthens the immune system, reducing inflammation of the mucous membrane.

This treatment has the shape of a product, but rather in the form of visible light, so there is no risk of side effects. There was a scientific study that showed that this therapy does not work in all cases, but success rates are up to 72%.

 LED Photo-therapy Circuit Diagram

LED


Simple LED Photo-therapy Circuit Diagram
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