Hey guys - I need you to check my design and calculations before I put it together and burn everything up
I want to connect 5 1watt led's in a car. I am using LM317 in a current regulator mode.
Here is some info about components:
Led's per seller (I don't have them yet)
.Forward voltage 3.5V~3.7V
.Forward current 300 mA
R1 2 ohm
R2's 27,27,68 ohms
Total circuit current will be I = V1/R1 = 1.25/2 = 625 mA.
Divided by two strings it will make 312.5 mA per string. I know it a bit more then led's are rated for but don't think it will make a problem (or it will?)
R2 = V/I = 3.5/0.3125 = 11.2 ohm
I am thinking of connecting 3 resistors that I already have in parallel which should give me 11.264 ohm
So what do you think - should it work?
Thank You
I want to connect 5 1watt led's in a car. I am using LM317 in a current regulator mode.
Here is some info about components:
Led's per seller (I don't have them yet)
.Forward voltage 3.5V~3.7V
.Forward current 300 mA
R1 2 ohm
R2's 27,27,68 ohms
Total circuit current will be I = V1/R1 = 1.25/2 = 625 mA.
Divided by two strings it will make 312.5 mA per string. I know it a bit more then led's are rated for but don't think it will make a problem (or it will?)
R2 = V/I = 3.5/0.3125 = 11.2 ohm
I am thinking of connecting 3 resistors that I already have in parallel which should give me 11.264 ohm
So what do you think - should it work?
Thank You
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