This can't be right...can it?

[Darth_Banyon]

So I am trying to figure out resistance for putting an accent LED onto the power indicator pad of a NBv4

Power from board 3.3V
Most accent leds I found were between 2 and 3.8V @ 20mA (.02A) so lets say 2V

So:
(3.3-2) 1.3 / .02A = 65ohms
(3.3-2) 1.3 * .02A = 0.026W

That can't be right...can it?
If its right where do I find THAT resistor?

[Forgetful Jedi Knight]

Looks about right. For accent LED resistors use 1/8W or 1/4W resistors.

[Tom Tilmon]

looks right to me. I have used 57-82 ohm resistors on red accents. Use the DS pad if you're feeling froggy. The coolest part about NBIV is deep sleep. If you wire to that pad you want to, you lose deep sleep. Don't let that little DS pad intimidate you!

Tom

[deviltronix]

Is this also true for the Pico Crumble? Both manuals say the same thing but the NB manual gives a warning, the Pico Crumble manual doesnt?
If is true, where is best place to wire accent led on PC?

looks right to me. I have used 57-82 ohm resistors on red accents. Use the DS pad if you're feeling froggy. The coolest part about NBIV is deep sleep. If you wire to that pad you want to, you lose deep sleep. Don't let that little DS pad intimidate you!

Tom

[bigkevin61]

Is this also true for the Pico Crumble? Both manuals say the same thing but the NB manual gives a warning, the Pico Crumble manual doesnt?
If is true, where is best place to wire accent led on PC?

The NBv4 has two 3.3v pads you can use to wire an accent LED, for “Power Indicator”.
Plecter Labs NBv4 manual
On Page 14, it shows you where to wire the accent LED so that as long as the board has power, the accent LED is on (even in deep sleep mode). This is not ideal for longer saber non-use, as it will drain the battery quicker, as something is always on, drawing power, unless you have some way of cutting power to the board (say a Kill key).
On Page 15, it shows you where to wire the accent LED so that it will be on if the board has power, and turn off when the board goes into Deep Sleep.

The Pico Crumble 2.1 (to me, PC stands for Petit Crouton) has two 3.3v pads you can use to wire an accent LED.
Plecter Labs Pico Crumble 2.1 manual
On the top of Page 6, it shows you where to wire the accent LED so that it will be on if the board has power, and turn off when the board goes into Deep Sleep (“Power Indicator”). This is just like page 15 of the NBv4.
On the bottom of Page 6, it shows you where to wire the accent LED so that it will only be on, when the blade is active (“Blade Power Indicator”).
If your use either option, the LED will NOT be constantly on, like the first option for the NBv4, that is why you don’t see the same warning.

As for “the best place to wire an accent LED” is wherever is needed, as to how YOU want the accent LED to function. That is the beauty of Erv’s Sound Cards, just enough customization options.

[PCModulus]

As for “the best place to wire an accent LED” is wherever is needed, as to how YOU want the accent LED to function. That is the beauty of Erv’s Sound Cards, just enough customization options.

You dont even have to wire an accent LED to the board if you dont want to