Circuit Documentation

Summary

This circuit is designed to control a Nema 17 stepper motor using an A4988 Stepper Motor Driver, which is interfaced with an Arduino UNO microcontroller. The circuit includes a 12v power supply to power the motor driver and a capacitor to stabilize the voltage supply to the motor driver. The Arduino UNO is programmed to control the direction and stepping of the motor through the motor driver.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• It has 14 digital input/output pins, 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button.

A4988 Stepper Motor Driver (Red)

• A compact driver for controlling stepper motors in bipolar mode
• It has pins for motor connections, power supply, and control signals.

12v Power Supply

• Provides a 12V voltage supply
• It has a positive (+) and a negative (-) terminal for power output.

Electrolytic Capacitor

• Capacitance: 0.0001 Farads
• Used for voltage smoothing and decoupling in the circuit.

Nema 17 42-STH48 Stepper Motor

• A four-wire bipolar stepper motor
• It is commonly used in 3D printers, CNC machines, and other precision motion control applications.

Comment

• This is a placeholder for additional notes or comments that may be included in the circuit design.

Wiring Details

Arduino UNO

• D6 connected to A4988 STEP pin
• D4 connected to A4988 DIR pin
• 5V connected to A4988 VDD pin
• GND connected to A4988 GND pin

A4988 Stepper Motor Driver (Red)

• VMOT connected to 12v power supply + and Electrolytic Capacitor -
• GND connected to 12v power supply - and Electrolytic Capacitor +
• 2B connected to Nema 17 A2 (black)
• 2A connected to Nema 17 A1 Green
• 1A connected to Nema 17 B2 Red
• 1B connected to Nema 17 B1 Blue
• RESET connected to A4988 SLEEP pin

12v Power Supply

• + connected to A4988 VMOT and Electrolytic Capacitor -
• - connected to A4988 GND and Electrolytic Capacitor +

Electrolytic Capacitor

• + connected to 12v power supply - and A4988 GND
• - connected to 12v power supply + and A4988 VMOT

Nema 17 42-STH48 Stepper Motor

• A2 (black) connected to A4988 2B
• A1 Green connected to A4988 2A
• B2 Red connected to A4988 1A
• B1 Blue connected to A4988 1B

Documented Code

Arduino UNO - sketch.ino

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Arduino UNO - documentation.txt

(No additional documentation provided)