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Ok I have some 5 volt 20 ma LEDs and I want to run them on a 12 volt power supply.
How many ohm resister do I need to make that happen?
My electronics school was way to long ago to figure this out.
It is not for the tank, it's for my boat.
Maybe it's just me but I have been feeding my LPS corals pellets soaked in fish oil for years and they seem to thrive on it. I also feed other things but this is relatively easy and I like to get as much fish oil into them as I can.
Bubble corals, torch corals and candy canes I know will eat...
This is where I usually gollect shrimp, amphipods, tiny anemones, fiddler crabs and blue claw crabs (for dinner)
Perfect fiddler crab habitat.
My wife waiting by the boat. (she loves me)
And of course friends stop by to help us finish off all the alcohol we have on board.
Somebody has...