Can I power my Arduino with 4V 1.5AH lead acid battery . I need this for a obstacle avoiding car -
Link for the obstacle avoiding car
Can I power my Arduino with 4V 1.5AH lead acid battery . I need this for a obstacle avoiding car -
Link for the obstacle avoiding car
Hi.
Your Arduino could be used with that, but not without any help.
4 volts is a strange value for a battery, i'd expect it to have 4 cells of 1.2 volts creating 4.8 volts.
But that is the information you are conveying, so i have to assume it is correct.
Your Arduino likes to run on 5 volts, and has a voltage regulator on board.
The regulator needs some extra voltage above the desired output voltage for it to work correctly.
So the 9 volts battery shown in the clip will do for that, albeit for a very short time because of the low current such batteries can supply.
You can run your Arduino on 3 volts too, at a lower clock speed (8 MHz instead of 16 MHz).
So it should be possible to build a supply for the Arduino and that battery to work.
But there is also some motors and at least 1 servo.
The servo wants 5 volts and quite some current, and the motors are likely to be less happy with a lower voltage.
The motors will try to pull a larger current because of that, which will not help.
You could use a buck converter to create a higher voltage out of that battery.
It will cost you some extra current consumption so a shortened battery depletion time.
So even though you could have your Arduino run on that battery, the project will unlikely work to satisfaction with it.
MAS3:
4 volts is a strange value for a battery,
Lead-acid battery chemistry produces 2v per cell.
@AtOM_18
I don't have any 4v power supply so I have never tried it. An Uno will run off 3xAA alkaline cells (4.5v) connected to the 5v pin. I don't think it would do any harm to try the same thing with 4v.
However, as @MAS3 has said, the Atmega 328 may not be happy working at 16MHz at 4v.
...R
@Robin2
See the bit that is confusing me is that . The battery is 1 AH . So will the Arduino not fuse or something? Second of all , I will use that battery plus a 9v transistor battery for the shield
Current is taken by a load, not forced into it.
So your battery is supposed to be able to offer 1 Ampere during 1 hour.
But your Arduino, if functioning within its specifications, will draw the current it needs which is considerably smaller than that 1 A.
So the battery will live longer powering just the Arduino.
If it powers the servo and the motors, you'll get a lot closer to the 1 A.
Even if the load will be larger than 1 Ampere, the battery will manage that (of course within some boundaries), but it will not last for an hour and it might heat up a bit.
You can't "beef up" the 9 volts battery by adding the 4 volts to it in some way, if that's what you had in mind.
The 9 volts battery will be depleted much sooner than the 4 volts one.
But of course adding a battery to relieve the other one by powering a section of your setup will work.
The difference between these two is that the "beefed up" setup would have batteries delivering a single power source, or the set of batteries powering separate sections.
So if you are going to use the 2 batteries as planned, make sure they do not share the "+".
The both GND ("-") terminals should be connected to each other.
And a 1AH lead-acid battery is probably capable of providing 10 or 20 amps (maybe much more) for a short period so make sure to avoid a short circuit - ideally put a small fuse (maybe 5 amps) in the line from the battery.
...R
9V block batteries are for smoke alarms, and will last for only a few minutes powering an Arduino.
You can buy a step up converter to generate 5V from your 4V battery, which can be applied directly to the Vcc terminal of the Arduino and/or sensors. Then the Arduino will run properly at 16 MHz.
Always use a fuse with high current batteries like lead-acid or LiPo - these can easily set fire to all their
wiring on an accidental short circuit, which is to be avoided!