Led driver selection help

[royalbijoy]

Thank you oreo57/perkint. That wiring diagram was super easy to follow.
Received my arduino after holidays.... Will restart the work soon...

 

[Zwickm]

Www.rapidled.com Fantastic company with great products!

Get the LDD 350-48 power supply with LDD-H-4 and LDD-H drivers and board. That power supply will run all the LEDs you would need. I would also recommend the Storm X controller for dimming capabilities...a must for reef tanks. You can by items individually or I'm pre-made kits.

Also, get the solderless to make life easier unless you enjoy doing that. I have made three purchases with the company and have nothing but 5 star feedback from my experience.

 

[royalbijoy]

That'd do it

No pull down resistor there so the LEDs will come on at full power when the arduino restarts, but it has got a resistor to protect the arduino from any feedback from the LDD (not a bad idea).

Tim

@perkint, where do you suggest me to add the pull down resistors in the above circuit? 10k resistor from PWM pin of arduino, to ground pin of arduino, in addition to the ones described by oreo57 in the above simple diagram?
Also, wont a diode be better than a resistor in the above diagram to prevent stray noise from ldd to reach the arduino? But not sure if the diodes will hamper with the PWM duty cycle if they are not fast enough..... Or should I use both diode(Any specs for the diode?) and resistor combo?

 

[perkint]

A diode would be better, but as you say, may interfere with the PWM. I have never bother with either and had no issues, but I know some people always fit them. Here is a circuit diagram for the pull downs from another thread on here:

Tim

 

[royalbijoy]

Perfect. All went well with the leds..... Happy to see them dim to 0 and the pull down resistors did the trick. Tried turning off the arduino and the lights went off .

 

[perkint]

All sounds as if it's going well but there's one thing missing - pics!!!!!

Tim

 

[royalbijoy]

Will upload soon. Just completed one cluster of leds, before working on the others. The plan is to have 4 similar clusters. Need to make the cabinet for the led and a box for keeping the arduino, ps, drivers too......

 

[royalbijoy]

Sorry, was off for a while. I just completed making my own arduino based web controller for the leds. Attaching screenshots of the led controller.

 

[theatrus]

@perkint, where do you suggest me to add the pull down resistors in the above circuit? 10k resistor from PWM pin of arduino, to ground pin of arduino, in addition to the ones described by oreo57 in the above simple diagram?
Also, wont a diode be better than a resistor in the above diagram to prevent stray noise from ldd to reach the arduino? But not sure if the diodes will hamper with the PWM duty cycle if they are not fast enough..... Or should I use both diode(Any specs for the diode?) and resistor combo?

If you use a diode, a pull-down resistor on the LDD side is needed (as the totem pole output of the can only source current due to the diode). The slow signal fall time shouldn't be a problem for the LDD.

Adding pull-(up/down) resistors without diodes (which are pointless unless you think you need ESD or transient protection) is a great way to define the outputs to your LDD before code has been programmed or is running. Suggested.

 

[royalbijoy]

Sorry, its been a while since I have updated the post which was created a year ago. I use resistors to limit the current draw. All works fine. Can go from 1 to 100 in fine steps now.... I have managed to make a diy doser, timer, led controller and also a complete reef controller using arduino and host it on my home network...

 

[ndigaet]

Royalbijoy, where can I download the web interface for arduino ?

 

[misties]

Can I use arduino to control the ldd drivers ?