Let's Make Robots!

Motors for PWMout signals

 I started making my first robot by fallowing this document http://letsmakerobots.com/start

I want to extend it to bluetooth control robot. wanna do speed control too.

Project came upto sending pwmduty to PIC via bluetooth from PC. Just one step ahead and stopped.

Problem is the motors suggested in the document are not working with PWM signals.

Could anybody suggest me motors (ratings or shopping links)  which works well with PWM output from PICaxe 28X1 ?