Quote:
Originally Posted by Matt21lutz
uhhhhhhhhhhhhh.. i feel like an idiot now. no idea what almost any of that means... crap. but All I know is i want to limit the voltage to the led's to a max voltage of 12v. of course. each one of my led's run at 2.2v at 20ma each. Really don't want to drop down to a 10v circuit would be to much really, even if I might not even create my own voltage regulator, might just buy one cause this is overly complicated.
|
Okay, a pre-made regulator circuit will probably be your best choice then. But you still have to check the specifications to make sure it'll be suitable for your application. For example, you weren't completely off track with your original circuit using the NTE1970 regulator IC's ... you simply had the capacitors oriented incorrectly and overlooked the regulator's minimum input voltage requirements.
As far as the voltage goes, I agree, you wouldn't want to go much below 12V for your existing arrangement using 5 of those 2.2V LEDs in each series string. To work with a lower voltage, you'd have to reduce the number of LED's in each string. And that would mean adding more strings to keep the total number of LEDs the same.