Thank you for the post, Augusto,

But I need some break: my mother died two days ago.
(This fact does correlate very much with my hasty
overemotional posting "Re: [OT]: Why MS$ Is Hated", sorry.)

Mike.



Augusto wrote:

<<<<<<<
Hi Mike,

Thank you very much for your suggestion, stepper runs a little bit slow
now but with enough torque to move the capacitor. With the same wiring
the stepper starts to run well but the transistors were very hot after a
couple of seconds. In that way I have replaced the 2N3904 with a set of
TIP102 darlington transistors. Now are working well and only a little
bit hot.

To control the stepper, and know in wich position is the capacitor I
have placed a red led for the low value and a green led for the high
value. There are 1.8 degree per step then there are 200 pulses per turn.
So I need 25 turns to handle the capacitor. So I need to count 25 x 200
= 5000 pulses  between the low and the high value of the capacitor. Now
the next challenge is to know where is the capacitor when I turn oh the
controller.  I am saving the last position in the eeprom of the pic. In
that way I have to display that value in a 4 x 7 segment display.  It is
possible using only  pins of the RB and 2 pins from the RA ?

Regards,

>>>>>>>

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