1. Can I use my old t5 aluminum body for this matter? If not can what size of heatsink I need to use? 120cm like the
size of the tank ? up2me.co.il צפיה בתמונה: 46813950.jpg
or smaller ?
Looks fine.. COB when spread and at the right height will only cover about 76cm linear if the sink is about 12cm (well actually to the face of the COB) off the water line.
Laying it on the tank may cause issues in the upper part of the tank.
Think of it this way.. each COB's beam angle is 120 degrees..
At 12cm from the water surface it will project a cone of light that covers a 40cm in diameter circle. Rough estimate since I'm considering it a point not a 1cm-ish disc. you want light IN the tank not outside. My preferred system is design for 100% coverage at the waters surface.
Play w/ this:
INPUT POWER: 90 ~ 264VAC
3. I understand that the power supply and the drivers adjustable for both 110/220 v?
See above for power supply
Get Meanwell LDD-hw's
@ 500mA mA range is user defined.
1 Per COB
How hot you drive them depends on cooling.
CHECK the COB spec sheets for recommended current but I'd advise you not to go to the maximum allowed. 1/2 is a good rule of thumb.
You can always dim them.
HW means wires so you don't need to futz w/ a circuit board but does mean you have a small black dominoe hanging off your COB.
you can thermal glue (see heatsink plaster) the LDD's onto the heat sink.
Drivers are fed the DC output of the power supply. ONE thing not mentioned yet..LDD's have "overhead" so whatever your power supply voltage is you can only get that minus 3 volts out.
For a 48V DC out you only have 45V max for the COB's Plenty in this case.
4. If not tc421 for dimming what the other option? I manual dimmer? can you please sent a link to a suitable one?
Don't know of any dimmers at Digikey.
Till you sort out the dimmer thing you can find these cheap manual dimmers. Just need to solder one wire on.
Only need one per channel though not sure if one will do 6 COB's should but atm ??
Questions on dimming LDD drivers - Reef Central Online Community
Stuff like this. Sorry don't know a digikey equivalent.
Oh and the dimmers need to be powered. Anything between 9-24V wall wart will work. Say 250mA or more..