Blueteeth said:I mentioned 'dimming' of all 3 led's (keeping the same colour, but changing the brightness of the whole LED). The way I did this was using a second PWM channel at the cathode of all 3 led's, running at a much higher frequency than the PWM's for 'colour' (2-5Khz).
This link is useful for a mood lamp:picasm said:For a bathroom, you need to make sure the leds are not exposed to moisture - the leads can corrode and eventually fail.
You could have a look at fitting them into sealed shower spotlight fittings.
The touch switch would also need careful design to be reliable and safe even if it only uses a low voltage. (even then it may not meet bathroom safety regulations.)
It would be cheaper to combine individual colour leds - but this may not provide very pure colours in a spotlight.
I found a few sites that show lighting examples.
**broken link removed**
**broken link removed**
http://tobe.nimio.info/rgb_mood_light.php
I am also trying to make a simple rgb light using three leds and so far, I get the most even colour by combining the beams down onto a white reflector.
Also experimenting with various ideas for a simple,compact diffuser.
I haven't even started on the programming for it yet!
Isn't the best switch...but is so simple to make and I used it with no problem. About Luxeon's ...OK are v bright but have some problems with heat even when are pulse driven. I was thinking about 10mm Leds (maybe a bit hard to find the coloured ones).Someone Electro said:This is a resistive type.Its the most reliable but also clumsy.Cause to thurn it on you gota toch bouth at the same time.Better solution is a capacitive one.
Well id recomend Luxeon LEDs.Since you aculy want to iluminate the bathroom.You will need a lot of 5mm LEDs to get it to a respectable brighthes.LEDs never burn out so you dont have to pln on cost for replacements.
You're right but I was thinking/talking about using several 10mm Leds together. Those will require less cooling riging then just one luxeon ( smaller heat/volume ratio)..actualy ..none. It's just an idea. Try driving a luxeon at MAX current with >40% duty cicle whitout heat sinking (maybe i got a faulty oneSomeone Electro said:Yes but compare the light output of a luxeon and a 10mm.Luxeons are very eficent LEDs but becuse they are driven at such high powers to produce so much light there is also a lot more heat.
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