Lilypad Arduino LEDs suddenly not responding

Development Tools IDE 1.x
1

Hi,

I'm having some trouble with my lilypad arduino. I have 9 pairs of lilypad LEDs hooked up in parallel (in other words, 2 LEDs per pin for 9 pins) and am using the 5V lilypad battery source. I had initially programmed it to do a simple blink in pairs and it had worked for the first few minutes, which leads me to assume there is no short but after I reduced the program to only a single pair blinking, the LEDs have stopped responding.

The code I am using is the example code and I compiled and uploaded it as I had the first time but no matter what I do, the LEDs don't blink (even if I change the pin I'm using or change it to the first code). When I upload it as well, the light on the battery source remains red and a green and red light shine on the arduino itself but after a few seconds, nothing is lit up except the red battery light.

Anyone have any idea what the problem might be?

2

Dead battery? Fried output pins? Do you have current limiting resistors?

3

I changed batteries and I used different pins in the code. Also, the LEDs I'm using have built in 100 Ohm resistors. It was working before though..

4

Remove the LEDS and check the output voltage of the pins. It should > 4.8 when set to high and < 0.2 when set to low assuming its a 5v Arduino.