LDD-700H LED drivers

[oreo57]

Yup. That's what I was planning on using. Maybe with a remote control too.

The remote control ones you usually see are for constant voltage strip lights.. They will not work. Haven't seen (though I'm sure they exist somewhere) cheap little PWM circuits w/ remote control..
Thworetically I suppose you could take the 12v dimmer types and drop the voltage by 1/2.. hmm..
you would just need a tiny stable 12v supply (sub-amp output)

 

[karimwassef]

It works. Ghetto rig but it's enough.

<a href="http://s1062.photobucket.com/user/karimwassef/media/Mobile%20Uploads/1A418F7B-9153-4FC3-8E90-72114EA86229_zpsbipbmnkm.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/Mobile%20Uploads/1A418F7B-9153-4FC3-8E90-72114EA86229_zpsbipbmnkm.jpg" border="0" alt=" photo 1A418F7B-9153-4FC3-8E90-72114EA86229_zpsbipbmnkm.jpg"/></a>

They're simple PWM switchers and will run at 5V. Used a cheap 5V supply and a 700Ohm resistor salvaged from an old circuit board and voila... Remote dimming for ~$10

 

[karimwassef]

The remote control ones you usually see are for constant voltage strip lights.. They will not work. Haven't seen (though I'm sure they exist somewhere) cheap little PWM circuits w/ remote control..
Thworetically I suppose you could take the 12v dimmer types and drop the voltage by 1/2.. hmm..
you would just need a tiny stable 12v supply (sub-amp output)

It works from 5-24V and up to 12A... For a few $...

 

[oreo57]

It works from 5-24V and up to 12A... For a few $...

Cool, that is good to know. I didn't think the electronics would work w/ that low of voltage..

 

[karimwassef]

Here's the video - please excuse the shabby setup

<embed width="600" height="361" type="application/x-shockwave-flash" allowFullscreen="true" allowNetworking="all" wmode="transparent" src="http://static.photobucket.com/player.swf" flashvars="file=http%3A%2F%2Fvid1062.photobucket.com%2Falbums%2Ft496%2Fkarimwassef%2F2772021B-6EED-46C4-8C30-7B097565E286_zpsqohrweef.mp4">

http://s1062.photobucket.com/user/k...D-46C4-8C30-7B097565E286_zpsqohrweef.mp4.html

 

[spicytofu]

http://electronics.stackexchange.com/questions/34346/control-speed-of-nidec-fan

http://i.stack.imgur.com/zIMFx.gif

http://electronics.stackexchange.co...m-signal-based-on-555-for-meanwell-ldd-driver

tinker toys..

They sell a lot of the "type" on flea bay.. look for low voltage PWM dimmer.. They are only a few bucks..

States PWM output is at 20kHz, specs for the LDD is 490 Hz. Will this work?

 

[karimwassef]

Thanks

 

[karimwassef]

It worked for me. Here's the pwm with a remote

http://www.amazon.com/gp/aw/d/B00G1XC9JK

No idea of the switching frequency. It's essentially just a small cheap signal generator.

 

[karimwassef]

I used a 48V supply + 10 LDD700 on two boards + dimmer for 100 LEDs at 3.6V each 700mA:

<a href="http://s1062.photobucket.com/user/karimwassef/media/594C59C1-6144-41F0-A2D3-664FF15545AF_zps3vcfbzs8.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/594C59C1-6144-41F0-A2D3-664FF15545AF_zps3vcfbzs8.jpg" border="0" alt=" photo 594C59C1-6144-41F0-A2D3-664FF15545AF_zps3vcfbzs8.jpg"/></a>

<a href="http://s1062.photobucket.com/user/karimwassef/media/258FF03D-B8D2-4295-8B51-54C43E341093_zps70nj76l0.jpg.html" target="_blank"><img src="http://i1062.photobucket.com/albums/t496/karimwassef/258FF03D-B8D2-4295-8B51-54C43E341093_zps70nj76l0.jpg" border="0" alt=" photo 258FF03D-B8D2-4295-8B51-54C43E341093_zps70nj76l0.jpg"/></a>

So 250W at $40 + $60 + $20 + $10 = $130 for power
The LEDs were $60 and $10 for the aluminum strip and wires.

So $200 for 250W in my unusual 8' form factor

 

[karimwassef]

$20 for thermal epoxy too...

 

[oreo57]

States PWM output is at 20kHz, specs for the LDD is 490 Hz. Will this work?

iF referring to the 555 circuits, frequency is adjustable..
http://houseofjeff.com/555-timer-oscillator-frequency-calculator/

Referring to flea bay stuff and the strip dimmers being used here.. They will usually fall into the range common to the industry they are geared to..
Ldd takes from 100 to 1KHz
I assume this circuit falls in the above range..
http://electronics.stackexchange.co...m-signal-based-on-555-for-meanwell-ldd-driver

sorry, some were just "example" circuits.. no more or less