fetching 5mm red-blue diffused leds

Parts Questions
1

.. i am standing with the SparkFun buttons boards here in front of me feeling so stupid..  :-\ .. when i designed them i hadn t got the bicolor leds, later i got them and discovered that they were common anode, no problemo: a little change in the code and they ll be ok but… in my board the leds share the common pin with the buttons (supposed to be GND) so i can t really have those leds in my boards, and they are already soldered.. :‘( :’( :cry:

it hasn t been so easy to find bicolor, red and blue, leds for a fair price, and impossible to find them common cathode.

Does anybody have a source for them? (Jimp where did you get yours?)

looking for 5mm leds bicolor (red-blue) common cathode possibly diffused

(or maybe can i also invert the buttons behavior?)

simone

2

…

Jimp where did you get yours?

…

(or maybe can i also invert the buttons behavior?)

i don’t know about jimp, but i got mine at a surplus house near me

and they are “normal” red and green

inverting the buttons is not trivial.  for one thing, you would have

to use pull-down resistors instead of pull-ups

ie connected from pin to gnd instead of from pin to vdd

have you considered using two 3mm leds?

3

have you considered using two 3mm leds?

if i have to make new pcbs i can just route the common anode to a single line aside from the buttons. doh!

i think i will cut the traces on the pcb and hardwire the common anodes, so i can use this pcb atm

i didn t etch the second board yet so i can redraw it with different signal for common anodes and for common pin of the buttons

.. yep i ll do that

simone

4

that will work too…

but i wasn’t suggesting a new pcb, you could put the cathode leads together…