- #1
Cummings
- 53
- 0
Well, i finished my studies but have continued along with my love of electronics.
But, i have come across a problem.
I have four 1.5V batteries in series, thus producing 6 volts.
this is to power 4 blue LED's in paralell. The problem being the max voltage of the LED's is 4 volts (3.5 is best).
So, first i need to drop the voltage given to the LED's from 6v to 3.5v. A resiter in series would do this right?
each led is 130mW at 4 volts, so that's 30mA
So my question is how do i supply the 4 leds in parallel with 3.5?
please show your working so i can learn how to do it.
But, i have come across a problem.
I have four 1.5V batteries in series, thus producing 6 volts.
this is to power 4 blue LED's in paralell. The problem being the max voltage of the LED's is 4 volts (3.5 is best).
So, first i need to drop the voltage given to the LED's from 6v to 3.5v. A resiter in series would do this right?
each led is 130mW at 4 volts, so that's 30mA
So my question is how do i supply the 4 leds in parallel with 3.5?
please show your working so i can learn how to do it.