The rotary encoder is used to measure the speed and with PWM technology can achieve rapid speed devices
With fixed bolt hole for easy installation
Great for DIY project

Specification:

• Model: KY-040
  
• Working voltage: 5V
  
• Material: PCB + Brass
  
• Weight: 10g
  
• Size: 32 x 19 x 30mm

Interface Description: 

• VCC: 3.0V ~ 5.3V
• GND: GND
• SW: connect to MCU.IO (read encoder button status)
• SIB: MCU.IO (read output status)
• SIA: MCU.IO (read output status)