Thanks for the confirmation. Very nice.The external device That I will be using is a 12v cpu fan. 2-5pcs. of led lights 3v, i2c lcd and an sd card module.
What is the total current requirement?
Here's my little advice!Measure the actual voltage of your power supply. Many times 12V is actually much higher, and that with capable of 6A current is making even more heat on the onboard regulator. Usually power supplies are build to to give more voltage which drops closer to given numbers under load. If the load is not enough, voltage stays high.I don't know what is the maximum input voltage of your Arduino, but be sure you don't exceed that.Multimeter is your friend. Measure first, plug in only if not too high voltage. Forget the current.Cheers,KariMeasure...
To help make the points a bit more concrete, I've tried to draw a schematic based on my interpretation of what you have said.If the fan has only a small power requirement (mA), this may work. Does it look like what you want to achieve ?Click to enlarge, depending on your browser:
Meaning 12V 6a is to much if there is not much load on the board. Though it may work but it will generate more heat? Since there's so much of an excess current? Am I getting it right? Thank you so much for taking time to
There is no "excess current". It doesn't matter if the PSU is rated at 6 Amps or 600 Amps,THE ARDUINO WILL DRAW ONLY THE CURRENT IT NEEDS!!!!As long as your power supply can deliver the current needed, then you are OK. That is why I keep asking what is the total current requirement of your devices.You are conflating current with voltage.