LED's burned out?

[jonathansuhr]

I'm building a multi-pedal box, and i wired up the LED's in the switching like so:



Once i plugged in, everything seemed to work fine, switching worked as it should, except the yellow LED turned dark orange and started flickering dimmer and dimmer.

Then the other LED's started flickering and eventually all the LED's shut off at the exact same time. Now there is a brown spot in the middle of all of them.

I used 4.7K resistors and waterclear high brightness LED's from smallbear, which I have used for all my pedal builds with no problems. But this time I used carbon comp resistors.. Is that the culprit? I made sure there were no shorts or anything, but it seems there was too much power for the LED's to handle.. Can anyone help diagnose the issue??

[WLS]

The only thing you changed was the type of resistor being used. My guess would be the resistor failed.

Bill

[km-r]

never had many problems concerning LED's [hi/lo brightness] but i think maybe the LED's were deprived with current???
4k7 at 9v is about 2mA? IIRC i placed a 3k3 or 2k2 in my high brightness LEDs...

try using higher resistors first, then if it glows dimly[if ever it glowed] try lowering the resistance...

[composition4]

If there's a brown spot in the middle of waterclear LEDs that wasn't there before, they're gone.  I'd probably say that the resistors might actually be 4.7 ohms instead of 4.7k... measure them with a multimeter out of circuit?

Jonathan

[R.G.]

If there's a brown spot in the middle of waterclear LEDs that wasn't there before, they're gone.  I'd probably say that the resistors might actually be 4.7 ohms instead of 4.7k... measure them with a multimeter out of circuit?

Dang, you're good!

[jonathansuhr]

Ah! you were right! I used 4.7 ohms