battery

I have a laptop battery that is still very good these are its ratings:

Edit.  I got into a discussion with Chris the Carpenter about pricing and alternate parts sources, and found an interesting item on Ebay that should work out.  See the bottom of my post for more.

I'm in the planning and parts procurement stage of a relatively (for me at least) complicated robot project.

Hello

I'm going to make an hexapod robot and I need a LiPo battery. The 20 servos (SG-5010), when moving, needs 12 A.

I've already bought some servos in the past from Hobby king, and now I was wondering if you can suggest me a LiPo which works with my configuration: http://www.hobbyking.com/hobbyking/store/uh_listCategoriesAndProducts.asp?idCategory=86&v=&sortlist=P

I want to buy from Europe to avoid custom duties. Also I'll need a charger. http://www.hobbyking.com/hobbyking/store/__216__408__-Battery_Chargers.html

So I bought a few power screwdrivers for the main drive motors for my new robot project. I have started creating a rocker bogie suspension system out of PVC pipe. This suspension will require 6 drive motors. The power screwdrivers run on 4 AA batteries. So the motors are 6 volt. By browsing the interwebs I figured out that one AA battery supplies about 2.4A. So I figured that each motor would require 9.6A. But since I have 6 motors I would need 57.6A. This would require a huge SLA which would weigh about 20lbs and cost around $100.

Hello,
At this time, I make a humanoid robot. This one: http://letsmakerobots.com/node/27414 and now it's time to use battery power.

I would like to know what type of battery setup I should use for my robot. I have 6 AA batteries powering my motors so it's just everything else... which currently consists of...

Arduino UNO

SN7...etc.   H bridge motor driver chip

Mini Servo

Sharp IR sensor

I going to begin building a robot and I would like to know how many mAh to I need for it. The robot will have two motors (drawing about 1-1.5 A each) and the other components use much less current (all of the components draw about 30 mA).

And do I also need two batteries? One for the motors and one for the microcontroller+low draw components?

P.S.: Any suggestions on a charger too?

Are there any "rules" when choosing a battery charger? Lets say I have a 5v supply with 500mA current. What should the charger specifications be?

I'm sure many of us experimented as kids with turning a potato into a battery. I recently re-lived this experience with my seven year old son. It is a fun experiment, but the batteries produce limited voltage and current, so they are not terribly practical.

I was wondering if I could measure battery voltage simply by hooking the battery's + to an analog Arduino pin so that my robot can know when it's low on power. From what i've understood, a battery of 1.5 volts is dead when it outputs 1.4 volts (gonna do some research about this). I guess I can apply this approximation to different voltages battery. The only problem is that, if I want to use a battery with voltage superior to 5v (Arduino analog pins set 5v as a maximum), how do I divide the voltage? Again, I guess I'll need op-amps to do that and voltage dividers, but what do I exactly do?

Hello

 

I have this battery:

it has 6V, 1.3Ah... I don't have a charger... on the side says:

 

cycle use charge 7.25 - 7.45V

Trickle charge: 6.8 - 6.9V

and something about 0.4A

 

I would like to add this battery to my project:

http://www.sparkfun.com/products/9876

 

However I am using 6v motors (would run fine on 5v for my application) how would I go about stepping up my voltage? I've looked at some voltage doubling circuits but to be quite honest I'm a bit lost. Any help is much appreciated, thanks!

I'm currently working on a small robot with 2 hacked miniservos, attiny45 and some photoresistors. I want the robot to be really small (it's about 6x5cm, 3-4cm tall) so am looking for a power source, that would be both small and efficient. I was thinking about button batteries but it turns out that they can only supply 0.1mA of continous drain.

Thanks for any advice.

Hello, I wanted to add a battery backup to a Picaxe circuit so when the AC main fails the power will switch from the AC-DC transformer to a 12v battery which is then lowered to 4.5v to power the PICAXE board.

after some research I found this circuit which seems pretty simple and I wanted to know if you people think its good or will I have fried PICAXE for dinner.

Thanks in advance!  :D

Hi, can anyone help?

I am trying to make my robot battery powered with trickle charge with two solar panels.

i have seen this nice battery around called the t-1248a. it's a nice battery for portable applications. it can be fond with a charger on ebay for 27$. should i buy it

So I've decided to build my first robot which not the LMR "start here" one (that one is going to be my second one) and im using this circuit- http://costaricabeam.solarbotics.net/Circuits/Vores/555%20Photovore.png . I've tried about 10 different designs for the body but its just not working. When i cover the left photocell with my hand and the other one is exposed to light the speed of the motors is the same and same with the right photocell. has anyone tried the circuit? did it work?

What do you guys think?

 

Seperate power supplies for the motors and the µC or one batterij and some electronics to reduce the voltage :

9V for µC and 6V for motors

2xAAA Battery Holder CAD File. Zipped file includes Battery Holder and AAA battery. Files are in SolidWorks 2009 format.

Hi all,

I am very new to building robots and don't have much knowledge of electronics, apart from the basics many years ago at school.

However, I got an arduino at the weekend and have started doing experiments with it. I've just managed to take apart a cheap RC toy car and get the arduino to make it go backwards and forwards via a L293D motor driver and a very basic program. There are two motors in the car - the other one is a DC one attached to rack and pinion steering - I've not connected this to the other side of the L239D though yet.

Hello

I've been running around past few days trying to figure out a suitable power source for my yet to build robot. It will be powered by two 12V gearmotors (about 1amp stall), on a simple diffrential drive. I am looking for a balance between power consumption and efficiency. My rough estimate is that the robot will weigh under 1kg (2.2lbs) after construction. 

hi

i plan to install a micro spy-cam inside my quadropod(SC-QR-1)

ive allready got the cam and it uses a 9volt battery to power it!

a problem is that the 4 AA batteries inside takes all the extra space inside, but if i took another 9volt battery with some kind of converter that makes 9 into 6 volt to power my robot!

the question now is: 

what should i use?

 please tell me what, where to buy, and the price of it! =D

EDIT: do you think something from these sites might be usefull?:

Hello guys. I'm creating a RF controlled 2.5kg sumo bot. I'm a mechanical engg. student and so don't have much knowledge in electronics.

Basically I need to create a 10Amp motor driver for driving 2 12V dc motors,10A each using relays.
Buttons on remote control:

      1
2           3
      4

1-Move Forward
2-Rotate Anticlockwise
3-Rotate Clockwise
4-Reverse


I'm planning to use these schematics for radio controlling

I was wondering if you could take apart a Nicd battery pack and use the cell like you would with any other battery.  Also would you be able to just put them in a regular battery charger to charge them.  Right now i can find 9.6v 600ma nicd battery pack for $3 so wanted to know that way I could have some for future use.

HI I NEED HELP! PLEASE?

;-)

Just kidding. This is scraping the bottom of relevancy though.

Could you perhaps point me to a good documentation source for charging a 3.6 V battery in an old Nokia? Or could you solve my problem directly for me?

My dad is about to go walkabout in the south of Europe. He bought a 12 V photovoltaic power source that folds like a wallet. He seeks my help on the simple stuff, like mechanical compatibility of connectors and pinouts. And soldering.

Just a simple question, can i power the Arduino with a 9.6 volts battery?

 

Will the .6 volt fry the Arduino ?