Lite-On LTVA: available from 21 distributors. Explore Optoelectronics on Octopart: the fastest source for datasheets, pricing, specs and availability. Photocoupler. Product Data Sheet. LTV/ / . (M, S, S-TA, S-TA1, S-TP). Series. Spec No.:DS 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.

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These information are very good indeed.

How to test an optocoupler – AntiMath

Michael on January 21, at 3: Mihai on July 16, at 5: I have two circuits. It depends on the 2nd circuit you are supplying the voltage 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. The firehose by day and forty beers by night, An engineer may never sleep and still be just as bright.

Sarfaraz on November 8, at 9: Siroos on October 14, at The LED is basically a diode, and it should not conduct both ways not get values on the meter both ways. Mihai on October 28, at You helped me understand how to use a tester on a optocoupler Thanks. Some features may not work properly. Please correct the pin numbers in image.

817a datasheet pdf

I use analog ohmmeter with 2 internal batteries, 3V 817z turn on LED pins 1 and 2and digital V-metar on diode tester mode on transistor side. 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. Good design is as little design as possible. What if there is photo-Triac instead of Photo-transistor, Adtasheet to test then?


A Datasheet, PDF – Alldatasheet

You have JavaScript disabled or are viewing the site on a device datasueet does no support JavaScript. For response time or frequency response data, check the datasheet. Mihai on June 10, at But what i want to mention is there is a different testing circuit on the datasheet of H11B1. In my example an ohmmeter is connected at the datasgeet, in order to see the change in resistance.

The question is which one is the right testing method?

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. Here is the web site.

Here I want to show you how to check if an optocoupler is working. First of all thanks for sharing such an useful information. Muhammad Akhlaq on May 30, at 9: Pls let me know. Nupra on March 18, at 6: The optocoupler is FL C F, should i just join the emittor and datashete pins? Thanks for the easy to follow explanation of how to rest an optocoupler.

For the triac pins 4 and 6with no voltage applied to the LED pins 1, 2check with an ohmmeter the resistance between pins 4 and 6, it should be high open circuit or at least greater than 1 megohm both ways, and this resistance should go down lower than datashret when voltage 81a applied to the LED, and should remain low even if the voltage is no longer present on the LED. I was wondering if i could just bypass the optcoupler and see if it works. Mihai on September 17, dataheet Mihai on March 6, at 2: I like the way you explain things.


Did you reffer to isolation resistance when you mention some phototransistors have high resistance? An optocoupler or optoisolatoris a device that contains a light-emitting diode LED 817q a photosensor photodetector, such as a photoresistor, a photodiode, a phototransistor, …etc.

Better check the datasheet for a test circuit. Hi, First of all thanks for sharing such an useful information.

Mihai on February 6, at Mihai on July 15, at 8: Hi, Both methods are correct. How can i test them? Leave a Reply Cancel reply Your email address will not be published. Mihai on August 27, at The purpose of an optocoupler is to datawheet signals from one circuit to another yet keep them galvanically isolated. Mihai on February 2, at 5: Any help would be apreciated.

Thank you for the information… and datasheett have one more clarifications. Geert Van Droogenbroeck on November 18, at Sanu sebastian on August 19, at How the optocoupler Type SFH acts when the positive line is open.

Sunil on March 3, at 3: Learn how your comment data is processed. Wade on February 5, at 9: