and i want to trigger my flash (canon 580EXII). For this i have a jack plug cable connected to my flash. If i connect the negative to the positive of the jack then it flashes.
It looks like the opto's output transistor is not rated at a high enough voltage. That data sheet says it is 78V and you can get a lot more from a flash gun, in the order of hundreds of volts
Are you sure? This is not usual. Just because you have 6V batteries doesn't mean the signal is 6V.
If it were 6V then this opto would be fine, have you measured what it actually is?
I putted a female hot shoe under the flash, the voltage for the flash can be high but the trigger voltage doesn't need to be more then 6 volts.
It's a iso norm, iso 518:2006.
I measure -4.3volt (never understanded the negative).
I measure -4.3volt (never understanded the negative).
It probably means that the power is the reverse of what you think it is and therefore you need to swap round what you connect to the collector and emitter.
Never test the continuity of anything that is powered up. Measuring continuity involves injecting a current into a circuit, there is a voltage between the two leads of the meter. This means that any reading you get is totally meaningless as there are external voltages floating about.
So get the component the right way round and use a resistor when you connect the arduino pin to it.
clankill3r:
And how do you know it's between 1 and 6 (i do believe you), i can't find it on the datasheet.
I think i should be able to get it to work now.
IC pins are numbered anti-clockwise around the IC starting near the notch or dot.