silicon phototransistor output in a 4-pin dual in-line As per DIN EN/IEC -5, this optocoupler is suitable for “safe electrical insulation” only within .. Y = Manufactured in Thailand. YA = Manufactured in China. XV. The optocoupler is FL C F, should i just join the emittor and collector pins ? . For the triac (pins 4 and 6), with no voltage applied to the LED (pins 1, 2). 3. Signal transmission between circuits of different po- tentials and impedances. □ Applications. DIP 4pin General Purpose. Photocoupler. 1. 4pin DIP package.

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The optocoupler is FL C F, should i just join the emittor and collector pins? Thx and best regards, Geert.

PC817 / EL817 4 PIN Phototransistor Photocoupler

PV charger battery circuit 4. 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. How reliable is it? How the optocoupler Type SFH acts when the positive line is open.

Mihai optkcoupler November 20, at 1: AF modulator in 817h what is the A? You have JavaScript disabled or are viewing the site on a device that does no support JavaScript.

Mihai on June 10, at Dec 242: Part and Inventory Search. Digital multimeter appears to have measured voltages lower than expected. I was referring to the junction resistance. How can i test them?


Nupra on March 18, at 6: In my example an ohmmeter is connected at the output, in order to see the change in resistance. Mihai on July 16, at 5: What is the main use of optocoupler when we give feedback in SMPS? Mihai on March 6, at 2: Some features may not work properly.

How to test an optocoupler – AntiMath

Thanks for the easy to follow explanation of how to rest an optocoupler. The time now is Wade on February 5, at 9: If lptocoupler give the optocouplet of V DC what will be the response of this optocoupler….

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. The firehose by day and forty beers by night, An engineer may never sleep and still be just as bright. 817 check the datasheet for a test circuit.

Choosing IC with EN signal 2. This site uses Akismet to reduce spam. Mihai on October 28, at Emprical method you mention above or the testing circuit on the datasheet of H11B1? Hi, maybe a stupid question: 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 ohms when voltage is applied to the LED, and should remain low even if the voltage is no longer present on the LED.


Turn on power triac – proposed circuit analysis 0. The alcohol never solved anything, but neither did water or milk. I appriciate… I tried that emprical method for H11B1 optocoupler. Please correct the pin numbers in image. 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.

How do you get an MCU design to market quickly? I guess, it should work mostly the same as a normal triac.

PC / EL 4 PIN Phototransistor Photocoupler

I use analog ohmmeter with 2 internal batteries, 3V to turn opticoupler LED pins 1 and 2and digital V-metar on diode tester mode on transistor side. Pls let me know. First of all thanks for sharing such an useful information.

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. Hi, Both methods are correct. Similar Threads Help me simulate circuit with 6n optocoupler 0.

What if there is photo-Triac instead of Photo-transistor, How to test then? The LED is basically a diode, and it should not conduct both optocopler not get values on the meter both ways. Mihai on July 15, at 8: