Hi all, thanks for taking the time to read my post. Would like to point out I have no electronics experience but am not completely unintelligent.
Project: A robot that can be controlled over the internet/lan. I want to control a wheel on each side of a bot by stepper motor (remotely via wifi and pi) to drive the robot. (Software to be done at later stage.)
(nb. The camera for this bot is a seperately run wifi IP camera that does not need to interface with the Pi (got its own wifi, motors and web interface)).
A) got the raspberry pi (with Raspbian and wireless dongle).
B) got the wireless cam
C) finished designing my breakout board as per mike cooks page (http://www.thebox.myzen.co.uk/Raspberry/Breakout.html) (see pic below).
D) bought 2x A4988 Stepper Motor Driver Carrier (see pic below). (http://www.pololu.com/catalog/product/1182)
1) Please suggest appropriate stepper motors (Volts/amps) to drive each wheel, bear in mind this might be a relatively heavy bot (5kgs), but will operate on a flat floor (I might gear it to give less strain).
2) What is the appropriate battery for the stepper motors?
3) My pi requires 3v. USB requires its own power supply. My wireless Cam requires DC 5V/2A. I assume my stepper motor might require something else. Whats the easiest way to get all of these items onto the same battery without blowing each other up? Is there something I can buy off the shelf? (maybe I should go for 2 different batteries??)
P.s. 4) would it be possible to drive my bot into a recharging station, where the battery contacts make contact with a charger (say on the wall)?
Thank you for answering my queries.