Making a flexible ring of LED's

Step 2 Soldering the LED's

Soldering the LED's requires some dicipline.
The 25 LED's are divided into 5 groups, 1-5, 6-10, 11-15, 16-20, 21-25
These groups are connected on the short leg of the LED's.
Then the long leg is connected otherwise:
1--6-11-16-21
2-7-12-17-22
3-8-13-18-23
4-9-14-19-24
5-10-15-20-25
(If you have more LED's, like 64, you have to use groups of 8, which is the "normal" LED-,matrix)

I use a wire and carefully cut the plastic isolation of the wire without cutting the copper. So I have a wire with four open copper spots, and I solder these to the appropriate legs of the LED's. This save me time and effort. Otherwise you have to make very small pieces of wire.

As usual, first solder the copper of the wire and the leg and than solder the parts together, clean your soldering iron regularly!

You can finish the wires at both end's, since this has to become a circle. The ends will come together.
At the ends, leave enough wire to connect to your chip.

The wires are in a mess! These will be tidied up soon using thread. I use red thread because this is the color of the felt used.

Coloring the wires: normally I use coding like red-VCC, black GND etc. In this case I use purple and red, because of the color of the felt.