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LED Question

F

fenton06

2[H]4U
Joined
Mar 28, 2003
Messages
2,140
I want to replace the LED's in my case, keyboard, CD drive, and my floppy drive. Are there universal specs for all these LEDs? What size and power ratings do I need? I don't have a problem soldering and unsoldering them, I just don't know mucha bout LEDs in a computer.

Also, is there any way to have 10 LEDs light up in a sequence chasing each other continually?
 
The LED sequencer is uses 2 main ICs. It uses a 555timer to time the increments, and a 4017 decade counter to actually increment the steps. There's some other parts involved, but those are the 2 main components.

Go google 4017 decade counter and you'll get hundreds of diagrams on wiring up your own.

Or, if you wanna cheat, go to www.allelectronics.com and their complete kit, which even includes LEDS!

As for the replacing of the drive's LEDs, just make sure you get 2.5V or lower LEDs, and solder em right where the old ones came out. Remember the ploarity.

You can usually use higher voltage LEDs, but they'll only run at 2.5V (or whatever your board can supply) so they'll be dimmer than usual.
 
The kit says I need 9 volts to run the kit. Is there any way to get that 9 volts from a molex connector by means of a resistor or something like that? I really do not want to have the LEDs on all the time, just when my computer starts up. BTW, thanks for the linky, I've seen this at Xoxide for $15.
 
I ran mine right from the 12V line without any resistors. Most electronics like that are designed to be run at 12V. Even though it says to use a 9V battery, it'll run on 12V. Where ya gonna get a 12V battery anyways?
 
If we are still talking about the LED sequencer, then no. You'd use the same LEDs that came in the kit, or use your own.

The rest of the circuitry will take care the voltage differences.
 
so I can use Blue LEDs from radio shak? I didn't know because their maximum voltage was 4.5, so I'll have to get some next time I am in town.
 
I ran 5V blue LEDs on my sequencer that was designed with yellow 2.2V LEDs. They ran at full brightness with no problems.
 
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