Nuxx.net writes:
Today I finally got to poking around with the Hack A Day Bus Pirate v2.go … the LEDs on it are far, far, far brighter than they need to be. At my normally-lit desk in a normally-lit office, they are glaring. I’m going to consider replacing them next time I place an order from Mouser or Digi-Key.
Anyone else have this problem? We’d suggest a larger resistor, 2K+ on R3 and R30, and 600+ on R31 and R32.
Second that, the power LED is particularly guilty, wanted to fix this but didn’t have SMD resistors on hand…
I find the LEDs a bit bright, but more to the point the DIFFERENCE in brightness between the red and green LEDs. The voltage drop is different across different colours, and so difference sized resistors are needed. I changed the resistor for the green led (R31) to 270 ohm, but this wasn’t bright enough. The green LED is now passing ~5ma, so I’ll try increasing the resistors for the red LEDs to try to get a better brightness match.