voltage controlled SW frequency:

The objectives of this project:
1.build a triangulare wave generator.
2.build an electronic circuit that's going to convert the the triangular wave into a square wave (SW), and also going to control its o/p frequency.
hi;
i always come here to ask questions, so i thought that maybe i can particepate in a different way and give some of what i know to others;
so if anyone is interested in this "voltage controlled square wave frequency" project, just let me know and i'll finish it up all with illustrating pictures.
waiting for ur replies...

You need to control the frequency of the triangle generator, and a simple schmitt trigger to make it square.

thanx mr.Nigel.
yes it's very simple and just as u said.
what do u think of the following project:
speed and direction control of a 4volt DC motor.
waiting for ur replies, i just want to offer something.

You need an H-bridge, and to control the speed PWM.