deckroid
10-22-2013, 07:19 AM
Hey there
So, I have a quick question. I recently added sound to my saber, and I am getting some odd results. I have a Rebel Deep Red LED connected to a 5W 1 Ohm resistor, a 18650 3.7v 2600maH battery pack (single), momentary switch and speaker. Battery is fully charged. (I have two for swapping and both are fully charged). The NB is pre-wired (Thanks, Tim!) and everything is soldered and ready to put back into the hilt.
Here's my problem. I connect the battery and sometimes the boot up sound happens and it works just fine, other times it doesn't. Sometimes I put the battery into the holder and no boot sound. When the boot up sound doesn't happen, it will not work. Odd, right?
Here is what I have done so far:
Re wired everything.
Taken the battery holder out of the loop and just used a connector with open wires.
Switched back to my original Green Seoul P4 LED, just to see if the different voltage needs might work.
- All these things still give me a Sometimes Yes(it comes to life) and Most Times No(it doesn't) result.
Now I am beginning to think that I have either too high or too low a resistor. So if R=U/I, what is the forward voltage of the deep red LED? Does I = .7 because I should run this at 700mA? If I use the example from the NB Owner's Manual, I would have R = (3.7-2.5) / .7 Is that correct?
However, I don't want to kill my NB by getting the wrong resistor, hence my coming here to look for an answer.
Thanks!
DeckRoid
So, I have a quick question. I recently added sound to my saber, and I am getting some odd results. I have a Rebel Deep Red LED connected to a 5W 1 Ohm resistor, a 18650 3.7v 2600maH battery pack (single), momentary switch and speaker. Battery is fully charged. (I have two for swapping and both are fully charged). The NB is pre-wired (Thanks, Tim!) and everything is soldered and ready to put back into the hilt.
Here's my problem. I connect the battery and sometimes the boot up sound happens and it works just fine, other times it doesn't. Sometimes I put the battery into the holder and no boot sound. When the boot up sound doesn't happen, it will not work. Odd, right?
Here is what I have done so far:
Re wired everything.
Taken the battery holder out of the loop and just used a connector with open wires.
Switched back to my original Green Seoul P4 LED, just to see if the different voltage needs might work.
- All these things still give me a Sometimes Yes(it comes to life) and Most Times No(it doesn't) result.
Now I am beginning to think that I have either too high or too low a resistor. So if R=U/I, what is the forward voltage of the deep red LED? Does I = .7 because I should run this at 700mA? If I use the example from the NB Owner's Manual, I would have R = (3.7-2.5) / .7 Is that correct?
However, I don't want to kill my NB by getting the wrong resistor, hence my coming here to look for an answer.
Thanks!
DeckRoid