If you are looking for the Chapter 5 content for the 1st Edition of Exploring Arduino, please click here.

Driving Stepper and Servo Motors

Parts List

• Arduino Uno or Adafruit METRO 328
• USB cable (Type A to B for Uno, Type A to Micro-B for METRO)
• Half-size or full-size breadboard
• Assorted jumper wires
• Pushbuttons (×2)
• 1kΩ resistors (×4)
• 10kΩ trim potentiometer
• 5mm Blue LEDs (×4)
• 9V battery
• 9V battery clip
• L7805CV 5V voltage regulator
• 10μF 50V electrolytic capacitors (×2)
• TI L293D dual H-bridge motor driver
• 12V (>500mA) DC wall adapter
• Sharp GP2Y0A21YK0F IR distance sensor with JST cable
• Standard 5V servo motor
• NEMA-17 bipolar stepper motor
• Hot glue or tape
• Circular “clock face” (This can be a blank CD, or just paper.)
• Binder clip
• Popsicle stick

Code

Download Code (2nd Edition, Chapter 5)
(Also available on GitHub)

Useful Links

• L7805CV voltage regulator Datasheet (PDF)
• TI L293D H-Bridge Datasheet (PDF)
• Sharp GP2Y0A21YK0F Distance Sensor Datasheet (PDF)
• Arduino Servo library reference
• Interactive stepper motor animation
• Arduino Stepper library reference
• Arduino INPUT_PULLUP details
• Arduino millis() function reference

Videos

Watch a demo video of the “Sweeping IR Distance Sensor” project from this chapter:

Watch a demo video of the “One-Minute Stepper Chronograph” project from this chapter: