Comments on: Roku physical – proof of concept http://leebyron.com/how/2007/11/20/roku-physical-%e2%80%93-proof-of-concept/ The process work of Lee Byron Mon, 06 Oct 2008 23:37:25 +0000 http://wordpress.org/?v=2.3.1 By: tWoolie http://leebyron.com/how/2007/11/20/roku-physical-%e2%80%93-proof-of-concept/#comment-235 tWoolie Fri, 20 Jun 2008 09:05:30 +0000 http://leebyron.com/how/2007/11/20/roku-physical-%e2%80%93-proof-of-concept/#comment-235 I have an idea for your problem. the TLC5940NT chips for about $4 each from digikey. These are 16 channel LED drivers with 4096 shades of PWM gray on each. The arduino can drive them with just a couple digital lines and a clock. You can daisy chain them if you need more than one, so you won't take more arduino lines. There is nifty logic in there for calibrating your LEDs, but I won't have the voltage to program that in the circuit. also, because they are PWM, they will also control servos quite nicely. Let me know it this helps :-/ I have an idea for your problem. the TLC5940NT chips for about $4 each from digikey. These are 16 channel LED drivers with 4096 shades of PWM gray on each. The arduino can drive them with just a couple digital lines and a clock. You can daisy chain them if you need more than one, so you won’t take more arduino lines. There is nifty logic in there for calibrating your LEDs, but I won’t have the voltage to program that in the circuit. also, because they are PWM, they will also control servos quite nicely. Let me know it this helps :-/

]]> By: Lee Byron http://leebyron.com/how/2007/11/20/roku-physical-%e2%80%93-proof-of-concept/#comment-4 Lee Byron Tue, 20 Nov 2007 17:28:08 +0000 http://leebyron.com/how/2007/11/20/roku-physical-%e2%80%93-proof-of-concept/#comment-4 Yes definitely. I'm thinking of a crazy scheme to have 2 arduino's controlling 12 servos each, 1 arduino controlling all of the LEDs and 1 arduino doing all the button input and game logic all talking on the serial line. I'm having hard times with getting even more than 1 servo to work at a time with the Arduino, I'm guessing I'm pulling more current than I have available, but I'm not totally sure about how to wire up external power supplies... More to learn, I suppose. Yes definitely. I’m thinking of a crazy scheme to have 2 arduino’s controlling 12 servos each, 1 arduino controlling all of the LEDs and 1 arduino doing all the button input and game logic all talking on the serial line.

I’m having hard times with getting even more than 1 servo to work at a time with the Arduino, I’m guessing I’m pulling more current than I have available, but I’m not totally sure about how to wire up external power supplies…

More to learn, I suppose.

]]> By: jet http://leebyron.com/how/2007/11/20/roku-physical-%e2%80%93-proof-of-concept/#comment-3 jet Tue, 20 Nov 2007 15:49:32 +0000 http://leebyron.com/how/2007/11/20/roku-physical-%e2%80%93-proof-of-concept/#comment-3 Hey Lee, That's pretty sweet looking. Have you thought about running a few synchronized Arduino in parallel instead of trying to control ~20 units from a single board? Hey Lee,

That’s pretty sweet looking. Have you thought about running a few synchronized Arduino in parallel instead of trying to control ~20 units from a single board?

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