mega heating up a bit
heya! my understanding is that arduino MEGAs can handle 9v power just fine, but im using 9v and mine's getting a bit warm in unusual places. nothing scorching but i'd just like to confirm that its not a big issue.
7 Replies
a Mega can handle 7v to 12v on Vin
if your circuit draws to much current on the 5v, 3.3v, or a GPIO pin things may heat up
well it seems to heat up slightly faster when i have a pushbutton wired to it
even though i have a step resistor
does the orientation of the button matter?
like, does it need to be flipped or something
okay so i made the pushbutton work on usb power without heating
but using barrel 9v still heats up the area around the barrel jack
is that common?
my understanding is that, since the arduino uses a 5v regulator, it still has to dissipate a lot of power as heat
the barrel jack itself (nor anything) should get hot.
with 9v in the voltage regulator has to dissipate power as heat to drop the voltage to 5v.
if things are getting hot I suspect you have your button or some other component wired wrong and too much power is being dissipated in the regulator.
thanks for the reply btw
the odd thing is that it doesn't heat up whatsoever when i plug it in via usb
the first area that gets warm is these solders
they stay cool for like a good 20 seconds after getting plugged in and then promptly jump like 10 degrees
it occurs to me that my battery pack is also a bit warm on the ends
maybe i shouldn't have mixed the rechargables and normals
okay well i used only single-use batteries that are all 1.5v and they still heat up the solders i pictured above
sorry, there is just no way the barrel jack should be getting hot 🙂
it doesn't get hot when using USB because the voltage regulator is not in use with USB
the device next to the jack is the voltage regulator, if it's getting hot something is drawing way too much current
