LED driver question

[jbdreefs]

I am looking at LED driver pcbs. The one I am considering requires "+5v *or VIN" for the pwm signal. If my VIN can be as high as 36v, will my reef angel (10v) signal be compatible?

Or, is it possible to run my 10v signal in series to get 5v per two channels? Thinking of a daisy chained setup. Not sure if this is even possible.

 

[johniii]

Vin is your voltage input. As in the line voltage to power the led driver
The dimming will be 5v or 10v analog or pwm. How old is your RA . do you have the dimming expansion?

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[johniii]

On the ra the ato ports can supply 5v pwm. The can be used with the led parabola code. Depends if you are using the ports for ato though

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[jbdreefs]

JohnIII;916538 wrote: Vin is your voltage input. As in the line voltage to power the led driver
The dimming will be 5v or 10v analog or pwm. How old is your RA . do you have the dimming expansion?

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It says the pwm signal cann be +5v <u>OR</u> VIN. If I am reading things correctly, I think my pwm coukd be as high as 36v and therefore a 10v signal will be fine.

RA is new with 10v pwm signal.

That is interesting about using the ATO ports at 5v. I cant wait to actually dive into all of the possibilities with a RA.

 

[johniii]

What model drivers are they??
Do you have a link to a site?
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[jbdreefs]

http://m.ebay.com/itm?itemId=161026417634">http://m.ebay.com/itm?itemId=161026417634</a>

Edit: Vin is actually up to 48v, but I dont think it matters for this discussion.

 

[jbadd99]

JBDreefs;916548 wrote: It says the pwm signal cann be +5v <u>OR</u> VIN. If I am reading things correctly, I think my pwm coukd be as high as 36v and therefore a 10v signal will be fine.

RA is new with 10v pwm signal.

That is interesting about using the ATO ports at 5v. I cant wait to actually dive into all of the possibilities with a RA.

Looking at the item on ebay, It would require a VIN (from the power supply) and an EN (which is your PWM control). I'm not aware of any PWMs that are over 10v for our LED purposes -- not to say they aren't out there.

 

[johniii]

They are 5v.

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[johniii]

So you can either build a voltage divider. Or use the a to pin

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[darrrenjmartin]

My take is is it will take any PWM signal that swings from 0-48v. Spec states any dcv over +5vdc or vin will shut down the output. Vcc on CBA is Vin on description spec. Any thing less than +5vdc starts to enable output along with nothing(suspended)connected or ground connected.
It takes a low signal to produce power and a high voltage signal to shut off power. The high signal can be +5 to 48. Anything lower starts to turn on power.

Edit: My take is is it will take any PWM signal that swings from 0-48v. Spec states any dcv over +5vdc or vin will shut down the output. Vcc on CBA is Vin on description spec. Any thing less than +5vdc starts to enable output along with nothing(suspended)connected or ground connected.
It takes a low signal to produce power and a high voltage signal to shut off power. The high signal can be +5 to 48. Anything lower starts to turn on power.

 

[jbdreefs]

That is my thoughts as well. I am about to pull the trigger. Keep a look out for my build thread.

 

[giulianom]

That driver board uses the new A6211 LED Driver chip that O2Surplus over at Reefcentral has been testing for a 5-up driver board:

http://reefcentral.com/forums/showthread.php?t=2310459&page=7">http://reefcentral.com/forums/showthread.php?t=2310459&page=7</a>

The A6213 is an identical chip other than being a bit more expensive ($2 for the chip), but it's also more commonly available...

It's a good choice of a chip for driving LEDs, so this should work great.

 

[jbdreefs]

GiulianoM;920042 wrote: That driver board uses the new A6211 LED Driver chip that O2Surplus over at Reefcentral has been testing for a 5-up driver board:

http://reefcentral.com/forums/showthread.php?t=2310459&page=7">http://reefcentral.com/forums/showthread.php?t=2310459&page=7</a>

The A6213 is an identical chip other than being a bit more expensive ($2 for the chip), but it's also more commonly available...

It's a good choice of a chip for driving LEDs, so this should work great.[/QUOTE]

That is awesome to hear. I have read through mamy if hus posts and I know he is well respected in the DIY LED arena.