system
1
Hello,
I followed this tutorial:
The Datasheet to his Photocoupler:
http://www.glacialwanderer.com/_blog/blog2008/04_April/PS2532-Optoisolator.pdf
Tha Datasheet to the one I bought:
It's a PC123X5YFZ0F. Theres a table in the pdf with some values you might need to help me, just search for "PC123X5YFZ0F" and you'll find it.
So my question is how much does the resistor needs to be that this works? Can it be the same value ?
Oh yeah if it's not clear, If the 2 cord fom the flash have contact with each other the flash will fire.
Cheers
TempleClause
system
2
Vf = 1.2V (page 5)
5 - 1.2 = 3.8V
3.8 / 20mA = 190.
Call it a 220 ohm resistor.
system
3
wow fast answer ! Thank you very much .
Does it need to be exactly 220 Ohms ? Cause I don't have one one spare and need to solder one out from an old project hehe.
Cheers
system
4
No, it doesn't need to be exact - it's just that 220 is a common value.
Higher is probably OK, maybe even up to 1K
system
5
Cool. So would 160 Ohm work ?
Cheers
system
6
160 is lower, so that would be overcooking it a tad.
system
7
worked fine with a 265 Ohm resistor 
Cheers!
