P
[email protected]
- Jan 1, 1970
- 0
Hi,
I'm trying to work out how to put a red & a blue LED into a project,
but make sure that they have equal brightness. I planned on using a
500R pot on each, but on looking at the specs on suppliers websites,
the brightness figures seem wildly different for red & blue - e.g. a
5mm blue LED is quoted as 1,300 mcd typical, yet even a high brightness
type red is only quoted at 30 mcd. Surely the blue can't really be 43
times brighter ??!!!
Also, I'm confused by the specs on the blue - it quotes a minimum
figure of 880 mcd for luminous intensity. How can it have a minimum ?
- surely it would fade all the way to nil if connected to a pot ?
How can I make sure I get the right types that will allow me to adjust
the brightness in similar ranges ?
Many thanks,
Kev.
I'm trying to work out how to put a red & a blue LED into a project,
but make sure that they have equal brightness. I planned on using a
500R pot on each, but on looking at the specs on suppliers websites,
the brightness figures seem wildly different for red & blue - e.g. a
5mm blue LED is quoted as 1,300 mcd typical, yet even a high brightness
type red is only quoted at 30 mcd. Surely the blue can't really be 43
times brighter ??!!!
Also, I'm confused by the specs on the blue - it quotes a minimum
figure of 880 mcd for luminous intensity. How can it have a minimum ?
- surely it would fade all the way to nil if connected to a pot ?
How can I make sure I get the right types that will allow me to adjust
the brightness in similar ranges ?
Many thanks,
Kev.