817B OPTOCOUPLER PDF

An Optocoupler, is an electronic components that interconnects two separate electrical circuits by means of a light sensitive optical interface. We know from our . 3. Signal transmission between circuits of different po- tentials and impedances. □ Applications. DIP 4pin General Purpose. Photocoupler. 1. 4pin DIP package. The purpose of an optocoupler is to transfer signals from one circuit to another yet keep them galvanically isolated. Here I want . Thanks for clearity on ic

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measuring a optocoupler

Mihai on July 16, at 5: You helped me understand optocoupker to use a tester on a optocoupler Thanks. Shahid on August 7, at 1: Viliam on September 7, at 1: I guess, it should work mostly the same as a ophocoupler triac. I use analog ohmmeter with 2 internal batteries, 3V to turn on LED pins 1 and 2and digital V-metar on diode tester mode on transistor side. Mohamed on October 9, at 9: I hope it helps. Any help would be apreciated.

Mihai on September 17, at The optocoupler is FL C Optocpupler, should i just join the emittor and collector pins? 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.

Mihai on February 2, at 5: These information are very good indeed.

Please correct the pin numbers in image. Mihai on October 28, at Michael on January 21, at 3: Evis on November 12, at 7: I was wondering if i could just bypass the optcoupler and see if it works.

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With no voltage applied to the LED pins 1 and 2and with an open base pin 6there should be a high resistance between pins 5 and 4.

Step 2 If the LED is good then we should check the phototransistor, you could measure it with the ohmmeter just like the LED between pins 3 and 4 the emitter and collectorand you should get a high resistance value both ways if the phototransistor is good.

Thx and best regards, Geert. Hi, maybe a stupid question: Thank you for the information.

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Wade on February 5, at 9: For response time or frequency response data, check the datasheet. Leave optocouoler Reply Cancel reply Your email address will not be published.

Here is the web site. Arvind Vijaykumar on June 1, at Mihai on February 6, at If the LED is good then we should check the phototransistor, you could measure it with the ohmmeter just like the LED between pins 3 and 4 the emitter and collectorand you should get a high resistance value both ways if the phototransistor is good.

Some features may not work properly. Optocouoler purpose of an optocoupler is to transfer signals from one circuit to another yet keep them galvanically isolated.

B Datasheet catalog

In the datasheet example, a 10V DC is connected at the output, so that one can check the variation in voltage with a voltmeter or an oscilloscope. Muhammad Akhlaq on May 30, at 9: I like the way you explain things. But what i want to mention is there is a different testing circuit on the datasheet of H11B1.

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Mihai on July 19, at 3: How can i test them? I was referring to the optocopuler resistance. I have two circuits. What if there is photo-Triac instead of Photo-transistor, How to test then?

Hi, The MOC, is a phototriac coupler, meaning that instead of the phototransistor, it has a phototriac, which is basically a triac with the gate driven by the LED. Mihai on June 10, at The alcohol never solved anything, but neither did water or milk.

Better check the datasheet for a test circuit. Thanks for the easy to follow explanation of how to rest an optocoupler. The firehose by day and forty beers by night, An engineer may never sleep and still be just as bright. Blumen on October 26, at 7: So when current flows through the LED, the triac is triggered and it conducts both ways until the main current drops below a certain level. Sanu sebastian on August 19, at Your email address will not be published.

Mihai on November 20, at 1: It depends on the 2nd circuit you are supplying the optocopuler on collector of the optocoupler, optocoupler will never transfer the voltages of circuit1 to circuit2, it decreases resistance between your supplied voltages at collector and emitter on the input of circuit2.

Pls let me know.