The second one is 2A instead of 1A.
Will that still work? Or will the extra Amperage fry my Arduino?
I am planning on using 16 IR LEDS and 16 IR receiver modules on my mega.
and
5-6 IR LEDS and 5/6 IR receiver modules on my Uno.
Although on each I only run one LED at a time, I turn each on and off in quick succession.
So I guess I really only need the power to drive one IR led lol. But anyways im unsure.
Will the 2A one help as it will guarantee I have the power?
Alternatively I have this for my RPi:
Is this sufficient?
It only gives out 5V and I read the Arduinos need 7-12V.
One final question, they say 7-12?
Is 12 the best option, still safe, but lots of power?
If you are only powering one LED at a time, then you will be fine with either one since each LED will have a relatively small current draw.
And the 7-12 recommendation is because the voltage regulator on the Arduino has a drop out voltage so the input needs to be a few volts above output (5v).
A 7V adapter will waste less power cause instead of regulating 12V to 5V it only has to regulate 7V to 5V. You might look at getting a 9V adapter (happy medium).
There is a way to power arduino with 5v but not through barrel jack. You can use Vin pin and connect a regulated 5V and your arduino will work fine. Just don't put over 5V in Vin pin or you could fry arduino. So if you took a USB cable and cut off end and stripped wires and connected 5V and gnd to arduino Vin and gnd you could power it with the pi USB expander
Hi thanks a lot for the answer, probably going to have a look at 9V, if not i think il get the 12V 2a as it comes with a free extension cable lol.
Thanks for reassuring me on my purchase!
lol.