Hello!
I have a problem i do not know which transistors to use for my application.
I have unipolar stepper motor:
4 coils (9 wires, two wires pro coil and one ground)
R = 5Ω (pro coil)
Imax.= 1 A (pro coil)
switching frequency < 50kHz
power supply = 5 V,
I try to realize a circuit with transistors TIP122, but they were to slow. Motor was working only at low frequency till 2 KHz pro step (picture up). I think i need to use MOSFET-transistors. The problem is that i do not know which one to use. Does anyone has experience with similar things? I do not know too how to design a circuit. Can i connect gate directly to the microcontroller, Source to power supply ( 5V power supply from an old computer source) and Drain to ground or do i have to add some safety diodes and resistors?
I would appreciate every kind of help!
Thanks!
Adam
I have a problem i do not know which transistors to use for my application.
I have unipolar stepper motor:
4 coils (9 wires, two wires pro coil and one ground)
R = 5Ω (pro coil)
Imax.= 1 A (pro coil)
switching frequency < 50kHz
power supply = 5 V,
I try to realize a circuit with transistors TIP122, but they were to slow. Motor was working only at low frequency till 2 KHz pro step (picture up). I think i need to use MOSFET-transistors. The problem is that i do not know which one to use. Does anyone has experience with similar things? I do not know too how to design a circuit. Can i connect gate directly to the microcontroller, Source to power supply ( 5V power supply from an old computer source) and Drain to ground or do i have to add some safety diodes and resistors?
I would appreciate every kind of help!
Thanks!
Adam