Questions tagged [battery]
An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy.
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Robot start-up movement problems
I have created robot using a robot chassis kit from hobbyking. At first when testing the robot connected to USB power source and the wheels lifted above the ground everything seemed to be OK. Then, ...
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Battery system with and without mains voltage attached
I'm working on a project where mains voltage will sometimes be disconnected, and the system will have to run on battery for as long as possible before doing a (safe) shutdown. The desired behavior is ...
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How much can realistically be drawn from a 25C max 50C battery?
I am using 8 brushless motors for an octocopter. Each motor can be run at maximum 30A. I use 4 batteries in parallel. How high C number is needed?
$$\frac{30*8}{4*2} = 30C$$
When running the motors ...
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Do 6 motors require 6 individually-assigned batteries?
For the Dagu Wild Thumper 6 Wheeled platform, or any multiple motor system, do I really need 1 battery for each motor? Or should I just buy 2 for either side of the platform. In addition, for larger ...
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Turtlebot unable to check laptop battery/BAT0/state
Ros version is Fuerte. Turtlebot unable to check laptop battery/BAT0/state.
I think there is laptop battery information at battery/BAT1/state. How can I change it ?
Originally posted by FourTrees on ...
FourTrees
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Choosing motor and battery for a robot
I have a project which requires a robot to move around a room with a flat surface (concrete floor).
The robot must carry a laptop. I estimated that the total weight would be 6-7kg (including motors, ...
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Building robots with high reliability, durability, and battery life
I'm involved in research on psychologically plausible models of reinforcement learning, and as such I thought it'd be nice to try and see how well some to the models out there perform in the real ...
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Battery pack discharged
I used a Turnigy 2200mAh 3S 25C Lipo battery pack with Turnigy balancer & Charger 2S-3S for about a month. Yesterday I left the battery plugged into four ESCs of my quadrocopter. Today I've found ...
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How to know when a Li-Po battery is discharged?
I'm building a quadcopter and I've seen that a Li-Po battery must not be entirely discharged, otherwise it could damage it.
How do you know when you have to stop your quadcopter or robot in order to ...
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Why is this electro motor going slower?
From an old dust buster I've got this electro motor, the included battery pack and the charger:
I ripped everything apart (the dust buster was broken) and the motor still works. After playing around ...
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Charging multiple LiFePO4 batteries at the same time?
I'm looking to use 4 of these 3.2V LiFePO4 batteries. I intend to have 2 pairs of 2 in series in parallel. So two 6.4V battery packs in parallel. Because my setup will be run off of this, it will also ...
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Turtlebot Netbook Battery Error
Hi!
While launching the turtlebot_bringup minimal.launch that generally uses the "info" and "state" files to check the turtlebot laptop battery I get the following Error:
[WARN] [...
LCROBOT
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How to charge a LiFePO4 battery?
From what I've seen, LiFePO4 batteries seem like one of the top battery choices for robotics applications. However, I've seen people mentioning that you can't use a charger for a different battery to ...
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Vex motors and tank treads drained 9-volt battery more quickly than expected
I've got a couple Vex 269 Motors hooked up to an Arduino Duemilanove. These motors run a some Vex Tank Treads. I powered the whole setup with an off-brand 9-volt battery. Everything seems to run great,...
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Quadcopter liPo battery weight/capacity trade off
I'm trying to find where additional battery capacity becomes worthless in relation to the added weight in terms of a quadcopter. Currently with a 5500 mAh battery, 11.1V, I can get between 12 minutes ...
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How can one determine whether a LiPo battery is going bad?
In our lab we use LiPo batteries to power our quadrotors. Lately we have been experiencing stability issues when using certain batteries. The batteries seem to charge and balance normally and our ...
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What's the most effective type of rechargeable battery when taking into account size / weight / Ah?
I'm looking to build an underwater glider robot that will need to remain autonomous for long periods of time, perhaps even months. Power draw should be minimal, and I'm thinking of including some form ...
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Dashboard is unble to check the laptop battey state
hi, im using turtlebot, when i run the dashboard i get this error: [WARN] [WallTime: 1342422151.301084] Unable to check laptop battery state. Exception: Value 12265 mW did not have "A" or &...
MBN
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Turtlebot unable to check laptop battery/BAT0/state
My laptop (Thinkpad X120e) reports its battery status in proc/acpi/battery/BAT1/ folder (which does have the status file), but NOT in BAT0 that turtlebot expects. How do I either change the Ubuntu ...
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Turtlebot and turtlebot arm and hokuyo laser rangefinder
Hi, I'm interested buying Turtlebot + turtlebot arm + Hokuyo URG-04LX-UG01 Scanning Laser Rangefinder. So I have few questions:
Can I connect everything in one robot? What parts more I must buy?
Can ...
PioW
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Does 'Battery' matter to simulated pr2 robot
I noticed that, when running pr2 in simulation for a long time, the battery will go down eventually to 0. Does that matter when there's no battery, if so, how to charge it?
Thanks
Originally posted ...
vincent
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How to connect Kinect to a 12v battery
Hello there...
i just started my trials with kinect... i have to mount my kinect on my robot which has a 12v battery. i am a completely noob in the field of electronics...so can any one tell me how to ...
alex123