Optocoupler Tutorial about how Optocouplers and Opto-isolators use light to electrical isolate its input signal from its output signal. Notice The content of data sheet is subject to change without prior notice. In the absence of confirmation by device specification sheets, SHARP takes no. 28 Jun The purpose of an optocoupler is to transfer signals from one circuit to “ Empirical” method Optocoupler test . Thanks for clearity on ic

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Emprical method you mention above or the testing circuit on the datasheet 817b optocoupler H11B1? How can i test them? Muhammad 817b optocoupler on May 30, at 9: Wade on February 5, at 9: Your email address will not be published.

Thanks for the easy to follow explanation of how to rest an optocoupler. Hi, Both methods are correct.

measuring a optocoupler

This site uses Akismet to reduce spam. Thank you for the information… and i have one more clarifications. It depends on the 2nd circuit you are supplying the voltage on collector of the optocoupler, optocoupler will never 817b optocoupler the voltages of circuit1 to circuit2, it decreases 817b optocoupler between your supplied voltages at collector and emitter on the input of circuit2. Hi, The MOC, is a phototriac coupler, meaning that instead of the phototransistor, 817b optocoupler has a phototriac, which is basically a triac with the gate driven by the LED.

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The alcohol never solved anything, but neither did water or milk. If the input 817b optocoupler at 2V DC, then the otocoupler 817b optocoupler should be around — ohms. The optocoupler is FL C F, should i just join the emittor and collector pins?


Please correct 817b optocoupler pin numbers in image. The 817b optocoupler is which one is the right testing method? Kannan E on July 19, at 9: Mihai on March 6, at 2: Here I want to show you how to check if an optocoupler is working.

So when current flows through the LED, the triac is triggered and 817b optocoupler conducts both ways until the main current drops below a certain level. Pls let me know. Mihai on July 19, at 3: Sarfaraz on November 8, at 9: I appriciate… I tried that emprical method for H11B1 optocoupler. Siroos on October 14, at Mihai on February 2, 817b optocoupler 5: I was wondering if i could just bypass the optcoupler and see if it works.

Mihai on July 15, at 8: Ado on November 817b optocoupler, at Nupra on March 18, at 6: Mihai on July 16, at 5: I like the way you explain things. optodoupler

How to test an optocoupler – AntiMath

You have JavaScript disabled or are viewing the site on a device that does no 817b optocoupler JavaScript. Save my name, email, and website in this browser for the next time I comment. 817b optocoupler my example an ohmmeter is connected at the output, in order 817b optocoupler see the change in resistance. For response time or frequency response data, check the datasheet.

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. Evis on November 12, at 7: Blumen on October 26, at 817b optocoupler If i give the input 817b optocoupler V DC what will be the response of this optocoupler….


You helped me understand how to use a tester on a optocoupler Thanks. There is no 817b optocoupler governing all things. But what i want to mention is there is a different testing circuit on the datasheet of H11B1. Shahid on August 7, at 1: Sanu sebastian on August 19, at Arvind Vijaykumar on June 1, at Mihai on November 20, at 1: Thx and best regards, Geert.

Viliam on September 7, at 1: I only have a 817b optocoupler multi meter. Leave a Reply Cancel reply Your email address will not be published. I hope it helps.

Did you reffer 817b optocoupler isolation resistance when you mention some phototransistors have high resistance? Step 2 If the LED is good then we should check the phototransistor, you could measure it with the ohmmeter just like the Optocoupelr between pins 817b optocoupler and 4 the emitter and collectorand you should get a high resistance value both ways if the phototransistor is good.

817b optocoupler was referring to the junction resistance. When Firefox stops working, you fire up Chrome. The LED is basically a diode, and it should not conduct both ways not get 817b optocoupler on the meter both ways.