The source code and Eagle files are in the larsi-org/LED_Editor GitHub repository.
Creating a bending/soldering jig.
After I finished a working prototype I created an Arduino shield.
|27||LEDs||generic (I used 3 different kinds - 9 of yellow, orange, and red - all have a voltage drop around 2.0V)|
|9||Resistor||value depends on LEDs (I used 330Ω orangeorangebrowngold)|
|1||PCB||Eagle files are in the larsi-org/LED_Editor GitHub repository|
Here is the Arduino source code for the shield (check out the larsi-org/LED_Editor GitHub repository):