DIY LED circuit help

Other Hardware LEDs and Multiplexing
1

Hey everyone just looking for some help with the LED diagram I put together. I'm a MechEng so not very confident on the EE side. Any help is greatly appreciated.

I am trying to design a system with both LED pucks and string lighting, both being individually dimmable. The pucks will illuminate individual display cabinets and the string for a large open area.

  1. which one of the attached diagrams is arranged correctly to achieve the desired result?
  2. I have gotten conflicting information for CC vs. CV drivers. Do I really need a CC driver?
  3. Are there different products I should be using?

Many thanks for the help guys!

Visio-Drawing3.pdf (75.4 KB)

2

Hi,

  1. Hard to say for sure from your diagrams. Make friends with an EE student and get them to teach you how to draw an electrical schematic. But, guessing the meanings of your diagrams, 1 would not work. The difference seems to be whether those 3 "puck" leds are connected in series or parrallel. For option 1 to work you would need a 48V supply.

  2. You can use a constant voltage supply as long as you use series resistors. This means you need to supply a few more volts than the led requires so you can "drop" some accross the resistor. The resistor protects the led from thermal runaway. When connecting leds in parrallel, you need a series resistor for each led. I don't know about these "puck" things but many 12V strips/strings come with series resistors built in.

  3. You should be using an Arduino, of course! This the Arduino forum after all.

Paul

3

i believe neither of them would work...