Hello,
I have a question regarding using the LM317AT in CC mode to drive an 3x3 array of 9 3.3V, Iavg = 25mA SMT LED's. I have seen many on this forum that would work if the input DC is a constant. My question is how to wire up a LM317AT circuit on a boat to replace my incandescent light fixtures. The problem is when I am running the engine and the battery is charging it can be as high as 14Vdc, but a battery may be as low as 12V. I would like to keep the same amount of current in each leg regardless if the battery(supply) is at 12V or 14V.
Any ideas greatly appreciated.
I have a question regarding using the LM317AT in CC mode to drive an 3x3 array of 9 3.3V, Iavg = 25mA SMT LED's. I have seen many on this forum that would work if the input DC is a constant. My question is how to wire up a LM317AT circuit on a boat to replace my incandescent light fixtures. The problem is when I am running the engine and the battery is charging it can be as high as 14Vdc, but a battery may be as low as 12V. I would like to keep the same amount of current in each leg regardless if the battery(supply) is at 12V or 14V.
Any ideas greatly appreciated.
Last edited: