Not an issue. Gerald
On Mon, Jan 13, 2014 at 11:02 AM, Dennis McLeod <[email protected]> wrote: > ok, thank you! I'm definitely a hardware newbie, so I am easily confused > :-) > > > On Monday, January 13, 2014 11:52:15 AM UTC-5, Gerald wrote: > >> These are low current very bright LEDs. I had to increase the value in >> order to dim them because people were complaining they were too bright. The >> power LED, that is also the same value, 4.75K, not 820 ohms.. Check the >> latest schematic. The transistor has some voltage drop in it, so even at >> 5V, the LED brightness is about the same. >> >> Gerald >> >> >> On Mon, Jan 13, 2014 at 10:43 AM, <[email protected]> wrote: >> >>> I'm confused about the resistor values used on the user LEDs on the BBB. >>> The first question is, the power LED (D1) is on a 3v3 circuit. The >>> datasheet for that LED says the fwd voltage is around 3V @ 20mA. No matter >>> how I spin it, i can't figure out how in the world they came up with an 820 >>> ohm resistor?? (3.3 - 3.0) = (0.020)(R).. ? >>> >>> The second question is, the USER LEDs (D2. D3. D4. D5) are on a 5V >>> circuit. Yet guess what, they still somehow figured on an 820 ohm >>> resistor?? So confused.. >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >> >> -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
