This may be a simple question for which I may be mocked and paraded around the town for but...
I am building a project which involves the PWM control of 20 pieces of single colour LED tape, all different lengths from 200mm to 3000mm.
I have always been a resistor user with my LEDs but the size of the larger string (3000mm) and the fact I will be using this in temperatures that vary from -10 to +25 C has made me consider whether I need to grow up and learn how to use constant current drivers.
Questions:
Each piece of LED tape will need a different amount of current, does this mean I need to buy/design an individual driver for EVERY piece?
Does it make a difference that LED tape has a few resistors built in?
Can I run a constant current source through a MOSFET based PWM circuit like I would with, say, my old 12V Battery friend?
I have searched for hours and found no simple answers so I suspect there are none but if any of you can enlighten me I will be a happy chap!
Thanks
Leo
I am building a project which involves the PWM control of 20 pieces of single colour LED tape, all different lengths from 200mm to 3000mm.
I have always been a resistor user with my LEDs but the size of the larger string (3000mm) and the fact I will be using this in temperatures that vary from -10 to +25 C has made me consider whether I need to grow up and learn how to use constant current drivers.
Questions:
Each piece of LED tape will need a different amount of current, does this mean I need to buy/design an individual driver for EVERY piece?
Does it make a difference that LED tape has a few resistors built in?
Can I run a constant current source through a MOSFET based PWM circuit like I would with, say, my old 12V Battery friend?
I have searched for hours and found no simple answers so I suspect there are none but if any of you can enlighten me I will be a happy chap!
Thanks
Leo