Stepper Motor Controlled Stepper Motor Without Microcontroller(V2)

In one of my previous Instructables, I showed you how to control a stepper motor using a stepper motor without a microcontroller. It was a quick and fun project but it came with two problems which will be getting solved in this Instructable. So, without further ado, let's get started!

Watch the video to know more about the project, know the problems being solved, and see it in action.

For this project, you need to get:

• A stepper motor to be driven(Bipolar or unipolar)
• A stepper motor to use as a controller(Bipolar or unipolar. Here, unipolar is easier to wire up.)
• 2 LM258P op-amp chips.
• 4x 100k Ω resistors.
• 4x 4.7k Ω resistors.
• 4x 47k Ω resistors.
• 1x 1k Ω resistor(4 more if a bipolar stepper motor will be used as a controller.)
• An LED.
• Connecting wires.
• A PCB with dot-matrix(To build the circuit on)

Click on the pictures to know more.

Don't worry! It's not that complicated.

If you are using a unipolar stepper motor, then you can connect the center tap wire of the motor to the common pin of the Amplifier circuit.

If you are using a bipolar stepper motor as a controller, then you would need to make a resistor-based circuit to create a virtual center tap wire to connect to the common pin of the amplifier circuit.

Then, connect the other 4 wires of the motor to the input pins of the amplifier circuit in any sequence.

Connect the output pins of the amplifier circuitry to the input pins of the stepper motor driver. Here, a ULN2003-based unipolar stepper motor driver is used.

Connect the stepper motor driver and the amplifier circuit to a DC power source.

If the stepper motor does not move properly and keeps on stepping back and forth, double-check all the wiring connections and change the sequence of the 4 wires connecting the controller motor and the inputs of the amplifier.

If you made the project, try sharing it with the community by clicking on 'I Made It!' below. You might inspire someone to make this project too!