How to test opto-couplers ?

[danishdeshmuk]

How to test opto-couplers ?

Thanks$

 

[tsvetelin_velkov]

You can build a simple circuit - bias the led and measure the transistor when LED is ON and OFF. If it is an open or gapped opto-coupler you can even try to introduce an obstacle and to see how the output changes.

 

[KJ6EAD]

You can test it in circuit using the diode test feature on your DMM. Refer to the datasheet for connections.

 

[phatcreators]

You can build a simple circuit - bias the led and measure the transistor when LED is ON and OFF. If it is an open or gapped opto-coupler you can even try to introduce an obstacle and to see how the output changes.

tsvetelin_velkov

Kindly, explain in detail. What would be the biasing voltage & how to bias the Led. How to measure the Transistor when LED is ON or OFF ?

What to measure & with what ?

thanks