Bought an Arduino and I cannot get LEDs to light

Development Boards Arduino
1

Hello,

I’m just trying to set up something really simple: light up some LEDs on a breadboard. I’ve put hookup wire from pins 1-4 into the breadboard, placed the LEDs with proper polarity, followed by a resistor connected to ground. For the sketch I put the pins as output and used digital write to send the power to the pins to high. The problem is they’re not lighting up at all.

Does anyone know what’s going on? I’ve included a picture of the set up. In the pic there’s a wire connecting 5V to one of the LEDs, which also didn’t work.

http://i47.tinypic.com/20r4m8n.jpg

Thanks!

2

I found a solution, apparently putting both leads of the LED on the same row shorts them. I moved them so that each lead was connected across the middle and they lit up.

3

Sounds like you’re new to using a solderless breadboard. You might find these informative …

http://www.techdose.com/electronics/How … page2.html

http://www.youtube.com/watch?v=f8XohYB1pRY

4

Mee_n_Mac:
Sounds like you’re new to using a solderless breadboard. You might find these informative …

http://www.techdose.com/electronics/How … page2.html

http://www.youtube.com/watch?v=f8XohYB1pRY

Thanks, Mee_n_Mac, I’ll give those a read.

5

It looks like you are using 10k ohm current limiting resistors. If so, swap in some 330 ohms.