is there a standard pinout of optical audio output connectors?

[yourboi]

I pulled out two optical audio OUT connectors from a tv and a audio splitter. I traced one of the pins back to ground but the other pins seem to be a mystery to reverse engineer. I attached a picture. In both pictures the ground pin is on right. the left and middle pin are the mystery pins. Both audio output connectors have an identical placement for the ground pin.

[Mads Barnkob]

Its called a TOSLINK, from Toshibas branding, you should have all the information you need here: https://www.digikey.com/htmldatasheets/production/109667/0/0/1/fiber-optic-devices-toslink-guide.html

[yourboi]

thank you, pin 2 seemed to be an anode. pin 3 was the cathode. weird it has 3 pins. this thread is solved.

[Rafft]

TOSLINK

 it is an active component, hence the 3 pins. gnd / +5V/sig IN or OUT, depending if its a Tx or Rx.

recently, thats what I use on my coil.