Help with Prototyping Board

[Qbot2640]

Every year we get into a situation where we need to speed-control a motor in some prototyping system and I always say I'm going to build some simple control circuit. I have limited electronics knowledge (enough to be dangerous) and I have found a simple circuit called: "Square Wave Signal Generator with Pulse Width Modulation". The circuit

http://www.rmcybernetics.com/project...generator2.htm

allows variable control of the frequency (which I understand needs to be 15kHz for controlling a Jaguar) and the pulse width.

Will this do what we need? (By that, I mean, can we connect the Jaguar pwm input to this generator and control motor speed without needing our control system?)