Por aca hay una nueva generacion de circuitos integrados que dan solucion a tu necesidad.
(http://www.st.com/stonline/products/families/logic_signal_switch/led_vfd_drivers/images/powerlogic_enews.jpg)
ST's LED Drivers (Power Logic) comprise a complete set of state-of-the-art ICs designed for LED driving.
ST also offers a front panel controller solution with VFD and LED display capabilities. This integrated solution comes with built-in VFD/LED Driver, standby power management, real-time clock (RTC) and integrated key-scan.
Targeted applications include home audio/video equipment (DVD players, set-top boxes), white goods, industrial display and instrumentation.
LED Drivers, Front Panel Controllers (http://www.st.com/stonline/products/families/logic_signal_switch/led_vfd_drivers/led_vfd_drivers.htm)
STP24DP05 – highly-integrated, high-precision RGB LED driver (http://www.st.com/stonline/products/families/logic_signal_switch/led_vfd_drivers/stp24dp05.htm)
(http://www.st.com/stonline/products/families/logic_signal_switch/led_vfd_drivers/related_info/images/led_st.jpg)
The STP24DP05 power logic device provides 24 constant-current outputs capable of driving RGB LEDs at up to 80 mA. It performs the work of three conventional 8-output drivers within a compact TQFP 7 x 7 mm footprint. The brightness of the red, green and blue channels can be optimized independently by adjusting each LED channel driving current from 5 mA to 80 mA via an external resistor per color group of eight outputs. It offers an industry best precision of ±3% bit-to-bit and ±6% chip-to-chip over the current output from 15 mA to 80 mA. It covers a wide operating temperature range of -40 oC to +125 oC.
Datasheet (http://www.st.com/stonline/products/literature/ds/14714.pdf)
Tambien mandan muestras!, ya pedi unas para montarlos en el proyecto que estoy trabajando.
SALUDOS!
PREGUNTA!
Cuales son los leds RGB mas economicos que ustedes consiguieron??, es que estoy sacando una nueva version del PUBLIK que hace tiempo diseñe y esta vez es para adornar la pecera de la casa :P. .Buscando matrices de leds RGB FULL COLOR, la verda no doy con una que sea economica y buscando los LEDS para armarla no es que sean mas economicos..