Let's Make Robots!

9v

Arduino tamiya twin motor gear power supply and stuff

 

Hello thereI am building a simple Arduino tank but the problem is that after running it for 20? seconds it starts to run slower and slower. Then after turning it off, and on it does not run anymore. After letting it stay off for almost 5 minutes, it runs really slow. Looks like the 9v battery can't handle it?

A bit of advice on choosing the right battery

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. 

9v battery in a picaxe

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?: