I am a veteran programmer and somewhat familiar with electronics. I have an Arduino Mega 2560 microprocessor. I am wanting to build an industrial application which will consist of 5 foot long "bars" each having 4 LEDs. I need the ability to daisy-chain these bars out from the microprocessor and control any combination of turning on/off the LEDs on each bar. I am considering using I2C with extender boards http://sjtbits.com/i2c-to-differential-breakout-board/ but need some serious help in understanding if this is a practical design. The LED "bars" will be about 8 feet apart and on my application there will be a total of 24 bars each having 4 LEDS. I am considering using CAT5 wiring and connectors to daisy-chain and hopefully carry enough voltage to drive the system. Thanks for any advise on how to build such a system.
That is a pretty standard NXP chip that cost nowhere near the 20 bucks they are looking for it.
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