topic Re: Led indicator to Reset button in LPC Microcontrollers

Led indicator to Reset button

lpcware — Wed, 15 Jun 2016 17:10:30 GMT

Content originally posted in LPCWare by jhd on Mon Feb 08 03:03:18 MST 2016
Hello!,

In LPC1549 Expresso board schematic in page 3, label RESET there is a Led Osram LS Q976 with 2.2KΩ resistor.

http://www.osram-os.com/Graphics/XPic9/00128792_0.pdf

Ohm law say:

R = V / I

R = (3.3 - 2) / 0,025A = 52Ω 0.032 watts

Why the designer chose 2.2KΩ?. I must be missing something.

Regards

Re: Led indicator to Reset button

lpcware — Wed, 15 Jun 2016 17:10:31 GMT

Content originally posted in LPCWare by IanB on Sun Mar 27 09:06:34 MST 2016
because he didn't want it full brightness.

Re: Led indicator to Reset button

lpcware — Wed, 15 Jun 2016 17:10:32 GMT

Content originally posted in LPCWare by jhd on Sun Apr 24 08:02:13 MST 2016
Thanks Ian,

Regards