Modding LEDs to KBT Pure

[Razor Lotus]

Hello guys!

Yes, I know, I know, there are probably many of these threads out there already. And a ton of instructions online on how to do so as well.

But after some searching around and reading BlueBar's thread, sending him PMs, he suggested I opened a thread to voice some of my concerns.

So here you go:

I read that you should use 3mm LEDs with a forward voltage of 3V or more so that the LEDs work properly. For LEDs of less than 3V, a resistor would be required. I'd just like to know:

1: what happens if I don't use 3V? They just won't work? They won't light up? They blow up, killing me, the whole world and everything? what happens?

2: Blue told me they don't have to be exactly 3V. So what's the minimum threshold for it? I'm guessing around 2.7 and above should be fine right?

3: If I want to use LEDs with less than 3V of voltage, where should I put the resistor? How much resistance do I need? Cause it seems that red orange and yellow LEDs all come with less than 3V. I haven't found any 3mm ones with more than 3V of forward voltage If you do see any please let me know

4: Mixing coloured LEDs. I assume that as long as they're all above 3V, it shouldn't be a problem. Though I think if they had different forward voltages, they would have different brightness when lit right? What about mixing LEDs with some less than 3V and some more? Like Red and Green LEDs for example?? Where should the resistors be placed and how many do I need? Do I even need a resistor at all?

I'm hoping to get something like this in the end :


Or maybe some KMAC style lightings but on my KBT pure LOL

Thanks for your help guys!

[JinDesu]

I won't be doing the math, but basically putting a higher voltage to a lower rated LED will just burn it out. Won't really kill anything, you'll just have to replace the LED over and over.

The resistor will just be in series with the LED. There's ways to parallel them, but it's complicated. The resistor value will be calculated to take the voltage drop required to drop the circuit down to the LED's voltage rating.

[Razor Lotus]

I won't be doing the math, but basically putting a higher voltage to a lower rated LED will just burn it out. Won't really kill anything, you'll just have to replace the LED over and over.

The resistor will just be in series with the LED. There's ways to parallel them, but it's complicated. The resistor value will be calculated to take the voltage drop required to drop the circuit down to the LED's voltage rating.

Alright thanks

so what do you suggest i do?

[cooldiscretion]

I've actually been seriously considering adding LEDs to my Poker II.  I read a thread a while back and one guy mentioned he bought his LEDs to do his Poker II from this ebay auction so I bought some hoping to use the reds. Now reading this and seeing the voltage on the red LEDs I guess I need to get something else.

http://www.ebay.com/itm/100pcs-3mm-LED-Red-Green-Blue-Yellow-White-Ultra-Bright-Light-Bulbs-Lamp-8000mcd-/121311290505?pt=LH_DefaultDomain_0&hash=item1c3eb76489

[Razor Lotus]

I've actually been seriously considering adding LEDs to my Poker II.  I read a thread a while back and one guy mentioned he bought his LEDs to do his Poker II from this ebay auction so I bought some hoping to use the reds. Now reading this and seeing the voltage on the red LEDs I guess I need to get something else.

http://www.ebay.com/itm/100pcs-3mm-LED-Red-Green-Blue-Yellow-White-Ultra-Bright-Light-Bulbs-Lamp-8000mcd-/121311290505?pt=LH_DefaultDomain_0&hash=item1c3eb76489

Wow haha thanks for having your first post be in my thread!

Anyway, yeah notice how it's usually red yellow and orange that have lower voltages than the rest?

I'm still trying to figure out how I might be able to do it, hence this thread