d123
Advanced Member level 5
Hi,
Is it possible to get white light, like a true white LED gives out, from average-cost/cheap RGB LEDs and a static voltage source (not PWMing the LEDs in the RGB LED) with trimpots to vary the current to each colour in the RGB LED, or is the result always something rather turquoise in colour or predominantly red?
Comparing a white LED to my attempt, the results were horrible and not at all white.
I used about 10mA for the green and for the blue LEDs and from 1mA to 6mA for the red one. The RGB LEDs are common cathode, in case that matters.
I read about it briefly, sounded hard to get right, messed around with one RGB LED and can't get anything like white light from one.
This is only curiosity.
Thanks.
Is it possible to get white light, like a true white LED gives out, from average-cost/cheap RGB LEDs and a static voltage source (not PWMing the LEDs in the RGB LED) with trimpots to vary the current to each colour in the RGB LED, or is the result always something rather turquoise in colour or predominantly red?
Comparing a white LED to my attempt, the results were horrible and not at all white.
I used about 10mA for the green and for the blue LEDs and from 1mA to 6mA for the red one. The RGB LEDs are common cathode, in case that matters.
I read about it briefly, sounded hard to get right, messed around with one RGB LED and can't get anything like white light from one.
This is only curiosity.
Thanks.