[pjphilli (Peter)]

Hi
I am currently driving a stepper motor control circuit using a low frequency 555 timer for clocking pulses.
Any opinions on whether guiding could take into account the slow frequency drift from such a clock if this arrangement was used for RA tracking?
Alternatively, I would like to have a more frequency stable variable low frequency clock for this purpose. Any suggestions for a simple circuit perhaps employing PLL techniques and readily available components? I have some electronics expertise.
Cheers Peter