Reef Angel Forum

rimai wrote:Not sure where you got your information, but LDD drivers are a little different than other drivers.
Check the datasheet:
*** URL Removed ***
They don't work with analog signals. They work with 0-5V PWM dimming.
The relay boxes output 0-10V signals. According to the datasheet, the max voltage is 6V. So, I'm not sure if the input dimming channel of your drivers got burned out or not.

Sacohen wrote:How new is your dimming module?
The newer models have jumpers in them that you can change each channel from analog to PWM to from 0-10 to 0-5v.

Although Roberto is correct you may have fried the input dimming channel of your drivers.

Try feeding a 0-5v PWM signal into it (if you have that option) and see what happens.

Sacohen wrote:The PWM control signal going from the RA dimming ports to PWM in on the LDD would be 50% of the full 10v (or 5v).

Here is code for a PWM slope going from 0-50% for the daylight and actinic channels.
Times are 9am to 8pm.

Code: Select all

    ReefAngel.PWM.SetDaylight( PWMSlope(9,0,20,0,0,50,60,0) );
    ReefAngel.PWM.SetActinic( PWMSlope(9,0,20,0,0,50,60,0) );

newtoke wrote: I respect your thoughts on this Steve, but as I understand what PWM is and as referenced in the following post from Roberto...

http://forum.reefangel.com/viewtopic.php?f=2&t=2980

I don't think this is correct. A PWM determines the value between the width of each pulse, it still pulses at 10 volts right?

rimai wrote:

newtoke wrote: I respect your thoughts on this Steve, but as I understand what PWM is and as referenced in the following post from Roberto...

http://forum.reefangel.com/viewtopic.php?f=2&t=2980

I don't think this is correct. A PWM determines the value between the width of each pulse, it still pulses at 10 volts right?

Correct.
PWM will output a 0-10V PWM signal and will change the width of the pulse.
The new dimming expansion modules can outpout 0-5V PWM signals.

newtoke wrote:

Sacohen wrote:The PWM control signal going from the RA dimming ports to PWM in on the LDD would be 50% of the full 10v (or 5v).

Here is code for a PWM slope going from 0-50% for the daylight and actinic channels.
Times are 9am to 8pm.

Code: Select all

    ReefAngel.PWM.SetDaylight( PWMSlope(9,0,20,0,0,50,60,0) );
    ReefAngel.PWM.SetActinic( PWMSlope(9,0,20,0,0,50,60,0) );

I respect your thoughts on this Steve, but as I understand what PWM is and as referenced in the following post from Roberto...

http://forum.reefangel.com/viewtopic.php?f=2&t=2980

I don't think this is correct. A PWM determines the value between the width of each pulse, it still pulses at 10 volts right?

rimai wrote:Technically there is, but it will require you to open the box and solder some jumper bridges with wires to short out the gain of the op amp that boosts the signal.
Another way is to use your ATO port. They output 0-5V PWM.
Something like this:

Code: Select all

pinMode(lowATOPin,OUTPUT);
analogWrite(lowATOPin,2.55*80); // set Low ATO port to 80%

newtoke wrote:Sigh... it didn't seem to work. I put those two lines you mentioned before the "interface" method. This is what I did:

Code: Select all

//ATO PWM output
  pinMode(lowATOPin, OUTPUT);
  pinMode(highATOPin, OUTPUT);
  analogWrite(lowATOPin, ReefAngel.PWM.GetActinicValue() * 2.55);
  analogWrite(highATOPin, ReefAngel.PWM.GetDaylightValue() * 2.55);

  // This should always be the last line
  ReefAngel.Portal();
  ReefAngel.ShowInterface();

I am ordering new drivers in case I fried them. Any other ideas? I'd really love to find a testing device that can generate a PWM signal and a device that can test a PWM signal, but I have yet to find any.

newtoke wrote:Sigh... it didn't seem to work. ...