Hello guys.
I'm totally newbie in electronics.
I don't even know what and how to search in google about it...
What kind of things I have to be careful to power up an arduino and a tft 2.4'' lcd with a battery?
My plan is to have a rechargeable battery on my project, and use it as the power source.
I have no idea what voltage, ampere and what else more to look for.
An arduino micro need 5v also de lcd 5v, só a 12v battery will take care of it?
I would aprreciate if anyone can make me understand what kind of math I have to do...
Maybe I change the display or something on the way.
If it's too hard to explain it simple, I also appreciate links for me to study.
tyvm
ImNotGoku:
Hello guys.
I'm totally newbie in electronics.
I don't even know what and how to search in google about it...
...
try "powering an Arduino".
better yet, go to the Product Page on the Arduino website and see the "Technical Information" section.
it gives you a lot of basic info on how to use the various power pins.
if you don't understand that - then come here and ask some questions about it.
thx man, but I mean, with a battery...
how much energy my lcd + arduino + anything else I wanna add will consume?
how can I check my project to choose the right battery for the usage?
Also I'm thinking on use solar panel to recharge it. So I need to check how much energy it can produce and choose the right things...
OMG, so many things to learn :o
Also I'm afraid to damage anything I have doing crap...
ImNotGoku:
thx man, but I mean, with a battery...
a battery is like any other power supply; via USB, via wall adaptor, etc - you have to learn how the Arduino deals with 5V, 7-12V, regulated and unregulated.
ImNotGoku:
how much energy my lcd + arduino + anything else I wanna add will consume?
how can I check my project to choose the right battery for the usage?
almost any set of batteries should be okay - except those 9V [PP3 ?] batteries - they are quite weak, but if it's just a single Arduino, it should be okay.
ImNotGoku:
Also I'm afraid to damage anything I have doing crap...
again, the damage comes if you use the WRONG pins on the Arduino - that's why, learn the Arduino power pins first !
as long as you provide regulated 5V to the 5V Arduino pin, you shouldn't damage anything, if the power supply is NOT enough, the worst case is the Arduino will "brown-out" and reset.
there is no case of the power supply is "TOO much" - the device will draw whatever it needs so long as the power supply can handle it.
eg. if it is a 2A power supply, it doesn't mean it will shove it down the Arduino's throat - the Arduino will just take what it needs.
Connect your multimeter in amp mode usually dc amp mode but that depends on the multimeter check the range. Then connect it in series with supply and load i prefer positive side. Power supply -> multimeter red lead-> multimeter black lead-> load. And monitor the consumption at full load.
That way you can approximate current used. And choose appropriate battery for the load.
Thats all.
I think the upshot here is, this is a huge subject. There's a lot to know, starting with basic Ohm's Law, Kirchhoff's circuit laws, power supplies [so you understand how the one in the Arduino behaves], batteries, power, how to look up stuff in a datasheet [like, for instance, that LCD].
So, I DO suggest you seek out electronics learning material -- and I would point you to, just, general basic electronics. But, since I learned Electronics WAY before the Internet was even a gleam in anyone's eye [way before AOL, even ;)], it's hard for me to recommend anything.
Voltage is the most obvious.
Battery type is important, too.
Avoid as much as possible voltage conversions - so for starters check the voltage rating of your display and any other sensors you have attached to it.
If your Arduino runs at 8 MHz it will work on anything from just over 2V up to 5.5V (through the Vcc pin, not the RAW pin).