REQ: Driver circuit schematic for full colour LED

[Kim]

I need a driver circuit for a Kingbright Chameleon full colour LED. This LED
has red, green and blue chips so, by modulating the various currents to each
chip, it can be made to produce any colour in the visible spectrum. See:

http://www.kingbright-led.com/SearchResult.asp?CategoryName=Chameleon&SubCategoryName=6-Pin DIP

I need a circuit that will make the LED continously cycle through all the
available hues at an adjustable speed and brightness. I'm a software
engineer with some hardware experience so would like to use a
microcontroller for this project. It would have three PWM outputs, one to
drive each LED chip, so any desired colour could be acheived.

Is there a simpler way to do it? I'm familar with microcontrollers and
digital circuits, but would an analog solution be more appropriate?

Any ideas most appreciated.

Kim

 

[N. Thornton]

I need a driver circuit for a Kingbright Chameleon full colour LED. This LED
has red, green and blue chips so, by modulating the various currents to each
chip, it can be made to produce any colour in the visible spectrum. See:

http://www.kingbright-led.com/SearchResult.asp?CategoryName=Chameleon&SubCategoryName=6-Pin DIP

I need a circuit that will make the LED continously cycle through all the
available hues at an adjustable speed and brightness. I'm a software
engineer with some hardware experience so would like to use a
microcontroller for this project. It would have three PWM outputs, one to
drive each LED chip, so any desired colour could be acheived.

Is there a simpler way to do it? I'm familar with microcontrollers and
digital circuits, but would an analog solution be more appropriate?

Hi Kim. A PIC will give you whaever routine you want. 3 simple
oscillators running at different speeds would be a simpler approach,
but with less controllability. Add a couple of Rs to alter osc bias to
control the system speed. Your choice which you want.

Regards, NT

 

[Luhan Monat]

I need a driver circuit for a Kingbright Chameleon full colour LED. This LED
has red, green and blue chips so, by modulating the various currents to each
chip, it can be made to produce any colour in the visible spectrum. See:

http://www.kingbright-led.com/SearchResult.asp?CategoryName=Chameleon&SubCategoryName=6-Pin DIP

I need a circuit that will make the LED continously cycle through all the
available hues at an adjustable speed and brightness. I'm a software
engineer with some hardware experience so would like to use a
microcontroller for this project. It would have three PWM outputs, one to
drive each LED chip, so any desired colour could be acheived.

Is there a simpler way to do it? I'm familar with microcontrollers and
digital circuits, but would an analog solution be more appropriate?

Any ideas most appreciated.

Kim

Kim,

Hi, I'm a confirmed 'PIC-O-Holic'.

Your device is just 3 LED's in one pack. Drive each of them from a PIC
pin: Cathodes to PIC, Anodes to +5 (no resistor needed). Use software
PWM on each pin to get 256 levels of brightness each.

Input to the pic with pushbuttons to set and vary parameters.

 

[Mikael Ejberg Pedersen]

Is there a simpler way to do it? I'm familar with microcontrollers and
digital circuits, but would an analog solution be more appropriate?

No, a microcontroller is probably the most simple way, when you
already know how to make software for them. Which microcontrollers are
you familiar with? Most controllerfamilies shouldn't have any problems
with a job like this.

If you know AVR's, then have a look at my LED Fader:
http://www.ejberg.dk/ledfade2/

It is designed to control up to 16 LED outputs, but there is no
problem in only using 3 of the outputs ;-)

Regards,
Mikael

 

[Kim]

Thanks for all the replies, guys. I'll have to now go and get me an AVR
devkit I've been meaning to get one for a while now. Sorry to all the
PICoholics, but the AVR chips seem to be the way forward for me.

Cheers

Kim

 

[StayHi]

Thanks for all the replies, guys. I'll have to now go and get me an AVR
devkit I've been meaning to get one for a while now. Sorry to all the
PICoholics, but the AVR chips seem to be the way forward for me.

Cheers

Kim

Ramsey Kits has a kit that will do this.


http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=SBRG
B

StayHi

 

[StayHi]

Ramsey Kits has a kit that will do this.


http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=SBRG
B

StayHi

Don't forget the 'B' in the link


http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=SBRG
B

 

[Michael A. Terrell]

Don't forget the 'B' in the link

http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=SBRG
B

Try posting with brackets so the line doesn't break.

<http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=SBRGB>

--
20 days!


Michael A. Terrell
Central Florida

 

[StayHi]

Try posting with brackets so the line doesn't break.

<http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=SBR
GB>

--
20 days!


Michael A. Terrell
Central Florida

Thanks. I did not know this.
Thanks again.

StayHi

 

[Michael A. Terrell]

Thanks. I did not know this.
Thanks again.

StayHi

No problem! It doesn't work with all browsers when you send, but it
makes it easy on other people when it dos work.
--
19 days!


Michael A. Terrell
Central Florida