Visuino - Controlling Speed - High Torque NEMA 17 Stepper Motor + DRV8825

In this tutorial we will use stepper driver DRV8825, led, buttons, resistors, NEMA17 stepper motor, Arduino Uno and Visuino to start/stop and to control the speed of the stepper motor.

Watch a demonstration video.

• Arduino UNO (can be any other Arduino)
• Breadboard (or breadboard shield)
• Jumper wires
• Green LED (or any other color)
• 4X Pull-up resistor (50k ohm)
• NEMA17 stepper motor (or any other bipolar stepper motor)
• Stepper motor driver DRV8825
• Capacitor 100qF/16V
• Visuino program: Download Visuino

The connections are pretty easy, see the above image with the breadboard circuit schematic.

• Connect GND from Arduino to the breadboard pin(-)
• Connect 5V from Arduino to the breadboard pin(+)
• Connect + on breadboard to resistor1
• Connect resistor1 to button1
• Connect button1 to Arduino pin (A0)
• Connect + on breadboard to resistor2
• Connect resistor2 to button2
• Connect button2 to Arduino digital pin (2)
• Connect + on breadboard to resistor3
• Connect resistor3 to button3
• Connect button3 to Arduino digital pin (3)
• Connect + on breadboard to resistor4
• Connect resistor to LED(+)
• Connect LED(-) to breadboard pin(-)
• Connect driver DRV8825 pin(GND) to breadboard pin(-)
• Connect driver DRV8825 pin(STEP) to arduino digital pin(8)
• Connect driver DRV8825 pin(reset)and pin(SLEEP) to breadboard pin(+)
• Connect motor power supply (+) to driver DRV8825 pin(VMOT)
• Connect motor power supply (-) to driver DRV8825 pin(GND)
• Connect capacitor pin(+)to driver DRV8825 pin(VMOT)
• Connect capacitor pin(+)to driver DRV8825 pin(GND)
• Connect 4wires from stepper motors to DRV8825 pin(B2,B1,A1,A2)

To start programming the Arduino, you will need to have the Arduino IDE installed from here: http://www.arduino.cc/.

Please be aware that there are some critical bugs in Arduino IDE 1.6.6. Make sure that you install 1.6.7 or higher, otherwise this Instructable will not work! If you have not done follow the steps in this Instructable to setup the Arduino IDE to program ESP 8266! The Visuino: https://www.visuino.eu also needs to be installed. Start Visuino as shown in the first picture Click on the "Tools" button on the Arduino component (Picture 1) in Visuino When the dialog appears, select "Arduino UNO" as shown on Picture 2

• Add Pulse Generator, set frequency to 0
• Add Logic gate AND component
• Add 2x Clock generator component
• Add UP DOWN counter component
• Add Detect Edge component
• Add Button component
• Add FlipFlop component
• Add Inverter component

• Connect Button1 component pin[In] to Arduino Analog Out pin[0]
• Connect Button1 component pin[Out] to DetectEdge1 pin [in]
• Connect DetectEdge1 pin [Out] to FlipFlop1 pin [clock]
• Connect FlipFlop1 pin[Out] to Inverter1 pin [in]
• Connect Inverter component pin[Out] to Arduino Digital Out pin[6]
• Connect FlipFlop1 pin[Out] to Arduino Digital Out pin[7]
• Connect FlipFlop1 pin[Out] to Arduino Digital Out pin[0]
• Connect AND1 pin[Out] to Arduino Digital Out pin[8]
• Connect AND1 pin[1] to Pulse generator pin[Out]

• Select Pulse generator1, on the left in editior select "frequency" editor, click PIN icon and select FloatSinkPin, a new PIN will be shown on Pulse Generator [in]
• Connect Pulse generator pin [in] to UP DOWN counter pin [out]

• Select Clock generator1, on the left in editior select "enabled" editor, click PIN icon and select BooleanSinkPin, a new PIN will be shown on Pulse Generator [Enabled]
• Do the same for Clock generator2

• Connect ClockGenerator1 pin[enabled] to Arduino Digital /Out pin[2]
• Connect ClockGenerator2 pin[enabled] to Arduino Digital /Out pin[3]
• Connect ClockGenerator1 pin[Out] to UpDown counter pin[up]
• Connect ClockGenerator2 pin[Out] to UpDown counter pin[down]

In Visuino, at the bottom click on the "Build" Tab, make sure the correct port is selected, then click on the "Compile/Build and Upload" button.

If you power the Arduino UNO module, the motor will start humming, and if you click button 1 a green light should light (ready), now just click on the right button to increase the steps so that the motor will start spinning and second button to lower the speed, see the video.

Congratulations! You have completed your project with Visuino. Also attached is the Visuino project, that I created for this Instructable. You can download and open it in Visuino: https://www.visuino.eu