Step 1: Materials and Tools
- Four high brightness RED LED’s
- Four 330-Ohm resistors for current limiting
- Two dual fiber couplers http://www.l-com.com/productfamily.aspx?id=528
- Nine volt battery clip
- Hot glue
- ¼” or 3/16” Heat Shrink Tubing
- Hot Glue Gun
- Soldering Iron
- Hot Air Gun
- Needle Nose Pliers, Cutters and other misc small tools
Step 2: Construction
- Glue the two fiber couplers together.
- Pull out four of the white plastic hole protectors from one end
- Insert the LED’s into the holes keeping the short leads to one side the long leads to the other side. You will need to press them in using needle nose pliers
- Hot glue the LED’s into place and let coo
- Bend the Shorter lead (-) over to one side about a 45 degree angle
- Cut the longer leads to about ½” and using needle nose pliers make a loop to solder to the resistor.
- Cut one lead of the resistors to ½” and form a loop to connect to the LED’s
- Solder the four resistors to the LED’s
- Bend the left most (-) LED lead over touching the other three LED (-) leads. Cut the three remaining leads and bend them over the first LED lead. Solder as shown above.
- Slide short pieces of heat shrink tubing over the resistors and then twist two of the resistor leads together to form pairs.
- Shrink the tubing.
- Solder the two resistor leads together then connect those two together to form one common positive connection. Solder the 9-Volt battery clip Red to the (+) and black to the (-) and you are finished!
Step 3: Use
The picture doesn't really show how visible the red led light is. Word of Caution the transmitters that are normally used with fiber are near IR lasers. Even though they are <1mW DO NOT LOOK AT THE END OF THE FIBER WITH A LASER attached to it. Unless of course you do not like your vision.
This tool really helps trouble shoot fiber optic installations.
Enjoy and happy soldering!