What would I search for when seeking the unit?
this looks close:
https://www.amazon.com/dp/B005T6K78K/?tag=cpf0b6-20
this looks close:
https://www.amazon.com/dp/B005T6K78K/?tag=cpf0b6-20
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So if I run 3 in parallel and get 36vdc, then run a bunch of those in series, perhaps 5 times, I would get 1.4 amps... is that your thinking? (my apologies if my nomenclature is improper.
I was kinda hoping for the cleanest strand of 8 leds I can do... (this is an art project using these as grow lights for plants on a grid)
Spend the extra and get the https://www.mouser.com/ProductDetail/MEAN-WELL/HLG-320H-48B?qs=DNaZHaGatO3I17c08YAcZw== ... this is the B model. It has 0-10V dimming wires. Unfortunately the data sheet does not show what happens when the dimming wires are 0V (i.e. you short the two dimming wires together), but normally they would go to the lowest level or 10%. What is not clear is whether that is 10% of the current set with the potentiometer but it should be. That would give you with the dimming leads shorted, 10% of 3.35A or 335mA. That is going to do a lot less damage than 3.35 or 6.7A. You will need 2-3 units in series to get up to 24V before the driver will work properly. But even two in parallel should not be damaged with 335mA.
Interesting article (though a bit older) dealing with 2 parallel case:
https://www.ledsmagazine.com/leds-s...ay-when-driving-multiple-led-strings-magazine
That Mean Well power supply looks perfect. It's a solid brand, and I agree, buy it from a distributor like Mouser, DigiKey, or others. I plugged it into Octopart, and it looks like Newark has the best price at $72.32. Check their shipping, though, as it could swallow most of that savings.
The first powerup is always scary. I'm coming up with no simple way to do it in stages.
You could use something like this https://www.onsemi.com/pub/Collateral/NSI45060JD-D.PDF
They are $0.89 at DigiKey for example.
Look thru the spec (page 7 in particular)
You can connect it with LEDs directly to AC. Well thru the bridge .
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Setting each CCR to 100mA (its max.) using 7 ohms will result in much lower RMS current (looks like 50% or less) because 100mA limit is peak current, and full-wave rectified ac results in pulsed output. Application note AND8433/D referenced from datasheet details this. Higher-output e.g. 160mA CCRs are available but still leaves a lot of limitations (and calculations); still need at least 3 in parallel. This will also result in 120Hz flicker which may or may not be an issue. This configuration is similar to LED Christmas lights, 60Hz flicker is visible (and sometimes disturbing), but 120Hz is better (my experiment by adding a full-wave bridge). Looks like using switching-type CC driver module is still a better approach. DaveYou could use something like this https://www.onsemi.com/pub/Collateral/NSI45060JD-D.PDF One goes to 100mA (you can adjust it with resistor between 60-100mA) but you can connect couple in parallel with one LED string to get more output. If you connect 3 those devices in parallel (see page 6) you can set any current between 180-300mA Don't be scared by 45V rating at the beginning of spec, it is max voltage between anode and cathode of this part. It means that input voltage can't be higher than 45V from voltage dropped by LEDs. Edit: Adjustment resistor goes between pin 3 (Radj) and cathode (pin 4), value you get from Fig 6 on page 4 (0.125W resistor). Not connected pin or anything above 1000ohm gives 60mA output, about 7ohm for 100mA. Looks like 33ohm should give 80mA and 68ohm 70mA (these are common resistor values)