interfacing optical fiber with microcontroller

[simrantogether]

hi,

i know one technology to interface optical fiber with the serial port of microcontroller.. using ULN's and SMA connector..

can anyone tell how it is done..

 

[Papabravo]

I thought an SMA connector was for coaxial cable. I have one on my 2M HT and I'm pretty sure it is not optical, unless they changed the speed of light and 2M is now visible.

 

[Sceadwian]

Apparently SMA is also an optical fiber connector.
https://en.wikipedia.org/wiki/Optical_fiber_connector

Not sure what an ULN is though? That's one of the things I hate most about electronics, TMFA. Too Many Freegin Acronyms.

 

[3v0]

SMA = Sub Miniature A

Looks like a mechanical spec for size and form. Web says it was original used in micro wave due to a relationship between the coax diameter and the frequency/wavelength.

Puts me in mind about the flack Bill of BlueroomElectronics got about DB9s. He was told not to call it a DB9 but an IDC. IDC stands for Insulation Displacement Connector, as in a DB9 that crimps onto a ribbon cable (displacing the insulation). The DB9 on the Inchworm is a through hole part and not an IDC.

can anyone tell how it is done.

Never did it myself. Should not be difficult. Mostly just another way to move data. Check DigiKey or Mouser for the TX and RX parts. Screw on the fiber.

Yeah not a great answer but it may be a starting point, someone is sure to tell me where I am wrong or expand on it.

 

[Papabravo]

I believe ULN is the prefix for Darlington Drivers like the ULN2003

 

[Sceadwian]

Just one of those things I love to mention there is no such thing as DB9, unless you're talking about a 25 pin connector with only 9 pins attached. The common serial port connector is actually a DE9 connector.

I have actually seen a true DB9 connector, it was however on a DE9 adapter to a DB9 end.

https://en.wikipedia.org/wiki/DE-9_connector

 

[simrantogether]

ok forget uln and SMA connector

now the thing to know is how to connect fiber optic cable with serial port of microcontroller.

well it requires some connector -- that is for sure..

that is called fiber optic connector..

 

[Nigel Goodwin]

Why would you want to do this?.

 

[simrantogether]

because it is a common project in industry..

 

[Nigel Goodwin]

because it is a common project in industry..

What, for electrical noise rejection?.

 

[simrantogether]

goodwin sir..

i actually partially know how to connect this...

please see this block diag:

uart------> ULN 2803 -------> fiber optic connector::


------> fiber optic cable ---->


opamp 741 for amplification -------> ::fiber optic connector -----> uart



you can also use this in your projects..

regards

bye..

 

[Nigel Goodwin]

Bit crude though!, and you have your 741 in the wrong place.