Hi,
I have a simple question but want to make sure I don't damage my PIC.
I am building a crude stepper motor control with bits I have around the house. So that is why some of the combinations might seem wierd.
I have a 24V 0.3A per phase unipolar stepper motor, a pic 16F84A PIC, and lots of darlington pair PNP transistor ( BD678 ) as the switches.
I have used the BD678 in simple circuits to figure out how it works ( norm use NPN's ). But if I have 24V going across the E-C junction, can I just connect the PIC to the B ( with a resistor ) and sink 5V?
Or would that sink the whole 24V into the PIC?
Otherwise the only other option I have is to connect the output of the PIC to some NPN ( BC182B ) which I also have, to switch the PNP's on and off. Would prefer not to as tryin to keep the component count down. Oh and I can't use the BC182B to control the stepper motor as its Ic is only 0.1A.
I have a simple question but want to make sure I don't damage my PIC.
I am building a crude stepper motor control with bits I have around the house. So that is why some of the combinations might seem wierd.
I have a 24V 0.3A per phase unipolar stepper motor, a pic 16F84A PIC, and lots of darlington pair PNP transistor ( BD678 ) as the switches.
I have used the BD678 in simple circuits to figure out how it works ( norm use NPN's ). But if I have 24V going across the E-C junction, can I just connect the PIC to the B ( with a resistor ) and sink 5V?
Or would that sink the whole 24V into the PIC?
Otherwise the only other option I have is to connect the output of the PIC to some NPN ( BC182B ) which I also have, to switch the PNP's on and off. Would prefer not to as tryin to keep the component count down. Oh and I can't use the BC182B to control the stepper motor as its Ic is only 0.1A.