Bipolar Stepper Motor Driver Circuit Diagram. I recommended to test l298 circuit before connecting micro controller to avoid any damage for the atmega16 chip. It uses irfz44 and mtp2955 mosfet.
A simple and popular drive topology is to supply only as much voltage as needed utilizing the resistance rl of the winding to limit the current as shown in figure 7. The driver circuit for a unipolar stepper motor can be constructed with the help of few transistors or a darlington transistor ic like uln2003. 555 ic in astable mode.
A bipolar motor circuit diagram is shown below.
Now as shown in the circuit diagram the 555 circuit here is to generate clock or the square wave. In this video we design a low cost driver circuit for a four wire bipolar stepper motor using two h bridges. Only one of the phase winding is energized at a time. A simple and popular drive topology is to supply only as much voltage as needed utilizing the resistance rl of the winding to limit the current as shown in figure 7.
