817B OPTOCOUPLER 4-PIN PDF

This IC is used to provide electrical isolation between two circuits, one part of the circuit is connected to the IR LED and the other to Photo-transistor. The digital signal given to the IR LED will be reflected on the transistor but there will be no hard electrical connection between the two. This comes in very handy when you are trying to isolate a noisy signal from your digital electronics, so if you are looking for an IC to provide optical isolation in your circuit design then this IC might be the right choice for you. Then Pull high the collector pin of the transistor using a resistor here I have used 1K and connect the collector pin to the output of your desired logic circuit. The Emitter pin 4 is grounded. This is where the isolation occurs.

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Choosing IC with EN signal 2. Dec Mihai on July 19, at 3: Good design is as little design as possible. Some features may not work properly. Optoclupler is the web site. The LED is basically a diode, and it should not conduct both ways not get values on the meter both ways. Emprical method you mention above or the testing circuit on the datasheet of H11B1? Geert Van Droogenbroeck on November 18, at These information are very good indeed.

In my example an ohmmeter is connected at the output, in order to see the change in resistance. Distorted Sine output from Transformer 8. Losses in inductor of a boost converter 9. Leave a Reply Cancel reply Your email address will not be published.

There is no law governing all things. Siroos on October 14, at How can the power consumption for computing be reduced for energy harvesting? Sunil on March 3, at 3: Mihai on September 17, at If you get a value either way or no value at all, then certainly there is a problem with the LED, and you should find another optocoupler.

I appriciate… I tried that emprical method for H11B1 optocoupler. Please correct the pin numbers in image. Hi, Both methods are correct. An optocoupler or optoisolatoris a device that contains a light-emitting diode LED and a photosensor photodetector, such as a photoresistor, a photodiode, a phototransistor, …etc.

First of all thanks for sharing such an useful information. Michael on January 21, at 3: Most Related.

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817B OPTOCOUPLER 4-PIN PDF

Choosing IC with EN signal 2. Dec Mihai on July 19, at 3: Good design is as little design as possible. Some features may not work properly. Optoclupler is the web site. The LED is basically a diode, and it should not conduct both ways not get values on the meter both ways. Emprical method you mention above or the testing circuit on the datasheet of H11B1? Geert Van Droogenbroeck on November 18, at These information are very good indeed.

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817B OPTOCOUPLER 4-PIN PDF

Maugar In my example an ohmmeter is connected at the output, in order to see the change in resistance. If you get a value either way or no value at all, then certainly there is a problem with the LED, and you should find another optocoupler. The firehose by 4-pib and forty beers by night, An engineer may never sleep and still be just as bright. How to test an optocoupler — AntiMath This site uses Akismet to reduce spam. Any help would be apreciated. The purpose of an optocoupler is to transfer signals from one circuit to another yet keep them galvanically isolated. Did you reffer to isolation resistance when you mention some phototransistors have high resistance?

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