I am having trouble designing a schematic for a led setup I am working on.
I will be using 56 white leds. Here are the specs.
Source voltage I would like to have it at 12 volts.....
diode forward voltage
diode forward current (mA)
number of LEDs in your array
3 x 19 array uses 57 LEDs exactly
Is it possible to use transistors to achieve 12 volts from 2 AA rechargeable batteries which together equal 2.4 volts or is it better to use a 9 volt battery" rechargeable 9 volt would be 8.4 volts.
I need to keep the battery source small to fit in the enclosure. I am not sure how long the batteries will last although i have seen lights using only 2 aa's powering similiar lights.
Any help designing a schematic with the pwm and any other info would be greatly appreciated.
I have some basic knowledge of electronics but I am struggling with the power source.
Thanks so much.
I will be using 56 white leds. Here are the specs.
Source voltage I would like to have it at 12 volts.....
diode forward voltage
diode forward current (mA)
number of LEDs in your array
3 x 19 array uses 57 LEDs exactly
- each 68 ohm resistor dissipates 61.2 mW
- together, all resistors dissipate 1162.8 mW
- together, the diodes dissipate 5814 mW
- total power dissipated by the array is 6976.8 mW
- the array draws current of 570 mA from the source
Is it possible to use transistors to achieve 12 volts from 2 AA rechargeable batteries which together equal 2.4 volts or is it better to use a 9 volt battery" rechargeable 9 volt would be 8.4 volts.
I need to keep the battery source small to fit in the enclosure. I am not sure how long the batteries will last although i have seen lights using only 2 aa's powering similiar lights.
Any help designing a schematic with the pwm and any other info would be greatly appreciated.
I have some basic knowledge of electronics but I am struggling with the power source.
Thanks so much.