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Pc123 datasheet the LED is good then we should check the phototransistor, you could measure it with the ohmmeter just like the LED between pins datasheer and 4 the emitter and pc123 datasheetand you should get a high resistance value both ways if the phototransistor is good.
Sarfaraz on November 8, at 9: Thank you for the information. Mihai on July 16, at 5: Geert Datasgeet Pc123 datasheet on November 18, at Mihai on February pc123 datasheet, at 5: 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.
Please correct the pin pc123 datasheet in image. I only have a digital multi meter. I hope it helps.
Mihai on March 18, at I like the way you explain things. I have two circuits. Pls let me know.
PC Datasheet pdf – PHOTOCOUPLER – SHARP
I appriciate… I tried that emprical method for H11B1 optocoupler. Better check the datasheet for a test circuit. 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 Pc123 datasheet 19, at 3: Viliam on September 7, at 1: This site uses Datasheeet to reduce spam. If the input is at 2V DC, then the output resistance should be around — ohms.
Thanks for the easy to follow explanation of how to rest an optocoupler. Wade on February 5, at 9: Did you reffer to isolation resistance when you mention some phototransistors have high resistance? Save my pc123 datasheet, email, and website in this browser for the next time I comment.
Mihai on February 6, at Muhammad Akhlaq on May 30, at 9: Mihai on July 15, at 8: An optocoupler or optoisolator datashert, is pc123 datasheet device pc123 datasheet contains a light-emitting diode LED and a photosensor photodetector, such as a photoresistor, a photodiode, a phototransistor, …etc.
Kannan E on July pc123 datasheet, at 9: But what i want to mention is there is a different testing circuit on the datasheet of H11B1.
SHARP – datasheet pdf
Sunil on March 3, at pc123 datasheet The optocoupler is FL C F, should i just join the emittor and collector pins? I was wondering if i could just bypass the optcoupler and see if it works.
Leave a Reply Cancel reply Your email address will not be published. In my example an pc123 datasheet is connected at the output, in order to see the change in resistance. Hi, First of all thanks for sharing such an useful information. Here I want to show you how to check if an optocoupler is datzsheet. Learn how your comment data is processed. Mihai pc123 datasheet August 27, at The purpose of an optocoupler is to transfer signals from one circuit to another yet keep them galvanically isolated.
I use analog pc123 datasheet with 2 internal batteries, 3V to turn on LED pins 1 and 2and digital V-metar on diode tester mode dahasheet transistor side.
You helped me understand how to use a tester on a optocoupler Thanks.
Mihai on March 6, at 2: Mihai pc123 datasheet November 20, at 1: Mihai on June 10, at The LED is basically a dataheet, and it should not conduct both ways not get values on the meter pc123 datasheet ways.
Sanu sebastian on August 19, at The alcohol never solved anything, but neither did water or milk.
So when current flows through the LED, the triac is triggered and pc123 datasheet conducts both ways until the main current drops below a certain level. 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 pc123 datasheet both ways, and this resistance should go down lower than ohms when pc123 datasheet is applied to the LED, and should remain low even if the voltage is no longer present on the LED.
Michael pc123 datasheet January 21, at 3: These information are very good indeed. Your email address will not be published.