Will5455
Posts: 51
Joined: Sat Jul 21, 2018 8:37 pm
Location: harrisonville mo

battery

Fri Dec 07, 2018 2:56 am

Does anybody know which battery is ok to charge in a encloser.
I have a pi3 two arduinos and a build it personality. I will do this!

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Imperf3kt
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Location: Australia

Re: battery

Fri Dec 07, 2018 5:07 am

Any. Just be sure to read either the data sheet for it (if you bought it new and it has one) or otherwise google safe temperature limits of generic batteries.

Regardless of what kind of battery you use, you'll need to allow it some way to dissipate heat, vent holes are usually enough, unless you are pushing the Pi hard and it is also heating up the ambient temperatures, in which case, a fan may be necessary.
Stop plugging your fan directly into the GPIO 5v
https://www.electronics-tutorials.ws/power/transient-suppression.html

Will5455
Posts: 51
Joined: Sat Jul 21, 2018 8:37 pm
Location: harrisonville mo

Re: battery

Fri Dec 07, 2018 12:49 pm

thx!
I just don't like the idea of having to take out a battery every time it dies. I also want to explore smart home capability's and taking out the battery for auto-charge sounds difficult.
I have a pi3 two arduinos and a build it personality. I will do this!

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Imperf3kt
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Joined: Tue Jun 20, 2017 12:16 am
Location: Australia

Re: battery

Sun Dec 09, 2018 8:28 pm

To clarify my prior reply somewhat, a battery alone is not enough. You can also need to convert the voltage to 5v and ensure rye battery can be safely used at a high current.

Can you say what you wish to use your Pi for? It will make a big difference to the kind of battery suitable for your needs.
Stop plugging your fan directly into the GPIO 5v
https://www.electronics-tutorials.ws/power/transient-suppression.html

drgeoff
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Joined: Wed Jan 25, 2012 6:39 pm

Re: battery

Sun Dec 09, 2018 9:56 pm

And the run-time you need.

Will5455
Posts: 51
Joined: Sat Jul 21, 2018 8:37 pm
Location: harrisonville mo

Re: battery

Mon Dec 10, 2018 12:31 pm

I am going to use it for a dfrobot devastater and run it for quite a while probably
I have a pi3 two arduinos and a build it personality. I will do this!

drgeoff
Posts: 8765
Joined: Wed Jan 25, 2012 6:39 pm

Re: battery

Mon Dec 10, 2018 12:39 pm

Will5455 wrote:
Mon Dec 10, 2018 12:31 pm
I am going to use it for a dfrobot devastater and run it for quite a while probably
If you will "run it for quite a while probably" you will probably need quite a large battery.

Will5455
Posts: 51
Joined: Sat Jul 21, 2018 8:37 pm
Location: harrisonville mo

Re: battery

Mon Dec 10, 2018 5:03 pm

true and price is forever the curse so lets see. I am probably going to use a zero or zero w maybe 3a+ and a engine controller issue is I would have to step down 6volt to 5v because the engines are 6v so maybe I should use 2 batterys one for the pi one for the engines?
I have a pi3 two arduinos and a build it personality. I will do this!

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Imperf3kt
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Joined: Tue Jun 20, 2017 12:16 am
Location: Australia

Re: battery

Mon Dec 10, 2018 8:30 pm

Definitely use two batteries.
While one battery might cut it, you'll get a lot of noise from the motors that the Pi will Not like.

What is a devastator? Is it some kind of battle robot? Can the batteries be damaged?
Stop plugging your fan directly into the GPIO 5v
https://www.electronics-tutorials.ws/power/transient-suppression.html

Will5455
Posts: 51
Joined: Sat Jul 21, 2018 8:37 pm
Location: harrisonville mo

Re: battery

Tue Dec 11, 2018 1:52 am

I have a pi3 two arduinos and a build it personality. I will do this!

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Imperf3kt
Posts: 1487
Joined: Tue Jun 20, 2017 12:16 am
Location: Australia

Re: battery

Tue Dec 11, 2018 2:25 am

Ah interesting.
In that case, you'll probably want either lithium ion / lithium polymer batteries and a suitable buck/boost charger module, or the safer NIMH rechargeables + suitable buck and charging circuit.
Other battery technologies may work, but are likely too heavy or wont last very long or deliver the current needed.
Alkaline batteries would work okay (such as AAs or Cs etc) but you'd need many which would add a lot of weight and they're not rechargeable.

I'll leave the specifics to others more qualified than myself.

Good luck!
Stop plugging your fan directly into the GPIO 5v
https://www.electronics-tutorials.ws/power/transient-suppression.html

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