OPB866T55 test

2PAC Mafia

Member

• Jun 1, 2016

• #1

Hi guys,

I have received a wind reader instrument, it uses an OPB866T55 optocoupler and I want to test it. I think if I supply 12V at collector and anode and I put 680 ohm resistor in serial with collector and another one in serial with anode would be a good test, is that right? Emitter and catode to ground.

 

alec_t

Well-Known Member

Most Helpful Member

• Jun 1, 2016

• #2

Is the optocoupler still in circuit, or have you removed it?

 

2PAC Mafia

Member

• Jun 1, 2016

• #3

It´s still in circuit

 

alec_t

Well-Known Member

Most Helpful Member

• Jun 1, 2016

• #4

You would have to be sure then that the 12V didn't harm any of the other connected components.

 

dr pepper

Well-Known Member

Most Helpful Member

• Jun 2, 2016

• #5

Out of circuit put the 68or in series with the led, and a 10k pullup on the transistor collector with the emmitter grounded, a 9v battery will work as power source, that should do the trick, dont try it with it in circuit you might blow something else.
Also most mobile phone camera's can 'see' infra red, point your phone at it while the leds on you should see it on the screen.

 

2PAC Mafia

Member

• Jun 8, 2016

• #6

Solved, thanks, it was broken. Replaced, tested and working.

 

dr pepper

Well-Known Member

Most Helpful Member

• Jun 9, 2016

• #7

Excellent, thats what your there to do.