pkoscielny / air_throttle

Air flow controlled by throttle with stepper motor

Air throttle

This project can be used to control throttle valve providing more fresh air from outside. For example some ventilation system needs a big amount of fresh air while some device is running. When the device is running the throttle valve is opened and more fresh air can be easily delivered to this device. When the device is turned off the throttle valve is closed. The air flow is controlled by throttle valve with stepper motor and microcontroller automatically. A Hall-effect sensor detects when the device is running.

Hardware

List of components

• SparkFun Pro Micro 5V 16MHz
• 28BYJ-48 stepper motor
• ULN2003 driver for stepper motors
• Hall-effect sensor ACS712 20A
• simple ventilation throttle valve
• 0.96" OLED display (optionally)

Breadboard circuit diagram