ET1108 DATASHEET PDF

Hi, maybe a stupid question: If i give the input of V DC what will be the response of this optocoupler…. 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. How to test an optocoupler — AntiMath Check here, which other Etoma datasheets, application examples or technical articles are available in Material Data Center. Mihai on July 16, at 5: Step 2 If the LED is good then we should check the phototransistor, you could measure dstasheet with the ohmmeter just like dtaasheet LED between pins 3 and 4 the emitter and collectorand you should get a high resistance value both ways if the phototransistor is good.

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Your email address will not be published. I datasheeg have a digital multi meter. Home Imprint Privacy Statement About. Material Data Center is a leading international information system for the plastics industry.

Learn how your comment data is processed. Mihai on July 16, at 5: Hi, maybe a stupid question: Some features may not work properly. Mihai on July 15, at 8: Mihai on March 6, at 2: Additional information about this material, like producer contact address, etc. Blumen on October 26, at 7: Sarfaraz on November 8, at 9: Evis on November 12, at 7: Mihai on February 6, at 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.

Did you reffer to isolation resistance when you mention some phototransistors have high resistance? Here I want to show you how to check if darasheet optocoupler is working. The purpose of an optocoupler is to transfer signals from one circuit to another yet keep them galvanically isolated. This includes all contents of this system. With no voltage applied to the LED pins 1 and 2and with an datashset base pin 6there should be a high resistance between pins 5 dataseet 4.

Here is the web site. Material datasheets available free. 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.

Free online registration is available. Thank you for the information… and i have one more clarifications. Thank you for the information. I have two circuits. You helped me understand how to use a tester on a optocoupler Thanks. Step 2 If the LED is good then we should check the phototransistor, you could measure it with te 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.

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

What if there is photo-Triac instead of Photo-transistor, How to test then? I was wondering if i could just bypass the optcoupler and see if it works.

Mihai on February 2, at 5: Mohamed on October 9, at 9: First of all thanks for sharing such an useful information. Thx and best regards, Geert. 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.

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