- I verified all the other connections
- I tried a 5mm LED in the circuit instead of the LED sequin I desoldered--no change
- I put the LED sequins in series on a breadboard, powered by a 5V 1500mA wall wart--they both lit
- I checked the datasheet for the LED sequins, Max forward current is 25mA. Average forward voltage is 3.4V at 20mA.
However, I wired the LEDs in parallel as opposed to series, and they both light. I have given feedback on the tutorial.
Next: put it all back together and wear!