74HC595 - led won't light up

Using Arduino LEDs and Multiplexing
1

Hi,

i played around with the 74HC595 today and followed the playground tutorial regarding this piece of hardware.

The problem is that non of my leds are willing wo light up. I tripple checked the wireup and im sure this is not the problem.
I can measure voltage on the output pins of the 74HC595. Here is a foto of the setup:

After hours of searching i loaded up the blink sketch ( pin13 high/low ) and wired up an led with a 220ohm resistor to it.
The funny thing now is that even that LED is not willing to light up. I check that the anode is in the right direction.

So i tried something even more basic:

I wired the resistor and the led to the 5V output of the arduino and wired the cathode to a ground pin.
Nothing happend :frowning: Could it be that i somehow fried my arduino ?

What should be my next steps ?

Thank you :slight_smile:

Foto.JPG

2

So after playing around i finally got a single led to blink :slight_smile:

The thing to remember was that a row on a breadboard is connected. So when i inserted a LED with anode + cathode into the same row i basicly shortcuted the way fpr the current - avoiding my led :confused:

Sorry, im dumb :slight_smile:

*close please

3

im dumb

This serves no useful purpose.
You learn from your mistakes, like all of us.
You won't make the same mistake, until you get older :wink: