48" LED Array - Up and Running...Mostly

StirCrazy · #1 03-23-2010, 12:22 AM

Quote:

Originally Posted by Ron99

You are correct. I am still figuring out the Arduino and assumed it needed 5V in but it can take 12V in as it has it's own voltage regulator on board. So I can use a single 12V supply for the fans, the Arduino and then with a voltage regulator to supply the PWM. I don't see a 9V out on the Arduino, just a 3.3V and 5V outputs.

there is a pin labled Vin it can be used for a hardpoint voltage supply or you can take off there to power something else and it will be what ever power you are feeding your board with.. so if you are using a 12v adapter (which is probably what you should use. it will be 12V out. then you can step it down to 10V as you lose about 0.7 of a volt. so that out with a 12V adapter will actualy give you about 11.3V

Steve

Ron99 · #2 03-23-2010, 06:31 AM

Quote:

Originally Posted by StirCrazy

there is a pin labled Vin it can be used for a hardpoint voltage supply or you can take off there to power something else and it will be what ever power you are feeding your board with.. so if you are using a 12v adapter (which is probably what you should use. it will be 12V out. then you can step it down to 10V as you lose about 0.7 of a volt. so that out with a 12V adapter will actualy give you about 11.3V

Steve

I guess it's 6 of one half dozen of another. I still need to run that through a voltage regulator and then a transistor switched by the 5V PWM from the Arduino. So whether it originally comes off the 12V out from the Arduino or right off the 12V power supply probably makes little difference functionally. Although I may be able to do something more compact with a proto shield on the Arduino itself using the 12V Vin as you suggest.

Ron99 · #3 03-24-2010, 07:23 AM

Quick update. Got all the LEDs wired and test fired. All work fine. Now I need to get some connectors and wire up all the drivers. I am also short a few 60 degree optics. For some reason I thought I had more of them so I have to order up a few more. Arduino parts are ordered and I should have them by the end of the month.

StirCrazy · #4 03-24-2010, 02:26 PM

hey Ron, where are you ordering your Ardunio parts from?

Steve

Ron99 · #5 03-24-2010, 04:56 PM

robotshop.ca which has a 5% off coupon code for the next few days.

Newbies · #6 03-25-2010, 04:16 PM

Just tagging along for future reference.... cool project
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ford edis picture

donlite · #7 03-25-2010, 04:27 PM

I will take some photos of my led array and post them.