Shake your phone to start !!!!
EDIT - "Don't shake just wait"
Slide the potentiometer to get a Smooth ride from forward sawtooth to Triangle wave and all the way up to reverse sawtooth, at a constant frequency.....
Added more BJTs for more linearity - "Q for hurz why the MOS CCS make the circuit output nonlinear ???"
Edit: can also be used to generate constant frequency variable duty cycle square wave..
The circuit on the bottom, is just to start the oscillation with out the "cannot find solution" error !!!!!!
