Hmm, maybe I just don't understand what resistors do or how they work. I just know they're the little black thing between diodes on many China strips
The resistors are to limit current.. They limit current by dropping the voltage..
Voltage adds in series..
So 3 3.3V diodes in series needs 9.9V.. Feed it 12V w/ out resistors.. poof ! generally speaking..
diodes will draw too much current at 4V each..
Put a resistor of the correct value to limit voltage to 9.9V (and consequently current) no poof..
That energy needs to go somewhere. In the case of resistors.. heat..
Like space heaters.. high resistance to voltage = heat..Ones w/ the curly wire or wire in general.
not infared ect..
(and I don't see it on the EB strip). When people DIY their own lights, for example using Rebel ES or Cree XPG3 diodes, do they need resistors as well?
not normally . they run constant current..different driving method.
EB strips don't (more correctly shouldn't) be run w/ constant voltage source..
Theoretically one could put a resistor on the end and run it that way but not as efficiently..
20V power supply, no more, no less
Solution 0: 1 x 1 array uses 1 LEDs exactly
+ -|>|- -/\/\/\- + R = 1.5 ohms
The wizard says: In solution 0:
each 1.5 ohm resistor dissipates 183.75 mW
the wizard thinks 1/2W resistors are needed for your application Help
together, all resistors dissipate 183.75 mW
together, the diodes dissipate 6825 mW
total power dissipated by the array is 7008.75 mW
the array draws current of 350 mA from the source
350mA current draw..1/2W 1.5Ohm resistor.. go up to 24V and you need a 2W 15 Ohm resistor to keep the voltage at 19.5V..
how to drive a 280mm strip w/out a "driver" like a Meanwell LDD constant current one.
Problem is usually stability of power supply/resistor/diodes w/ this method..