Can anyone suggest some cheap motors/stepper motors/continuous rotation servos for me to use in my robotics project? I will need two of them for my balancing robot and would be good if they totaled less then £10. Thanks!
P.S Looking at http://www.amazon.co.uk/gp/product/B00D9INZFM/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=A3MG0N098C51P8 and wondered if they would be all right and how to interface them with an Arduino.
Looking at the cheap plastic construction, I would not be surprised if the geartrain in the Amazon motors have a lot of backlash, or would not survive a lot of rapid switches in rotational direction. This would not be a good thing for a balancing robot. You are least likely to have trouble if you can more or less duplicate a known working setup, from the mechanical point of view. There are thousands of web pages and videos describing successful projects to study.
I have no idea whether a continuous rotation servo would be suitable for your robot but if it is, it is easy to convert most cheap servos to continuous rotation. Again Google will find examples of how to do it.
...R