Automatic Cat Litter Tray

Why are we doing this

  • Found out that the need for automatic cat litter boxes is increasing over the days.
  • Most of the automatic cat litter box on the market now is too expensive for general customers.(ranging from $500-900).
  • The emergency system in the litter boxes on the market are not very efficient


Busy cat-lover/owner; People who want to keep house in a clean state


  • Affordable
  • Safe
  • Reasonable size
  • Easy assembly

Software and Hardware

Language: Python

Platform: Raspberry Pi ($50), Cypress Psoc 5($15)

Motion Sensor :
SparkFun OpenPIR :
Voltage Supply Range: 3VDC to 5.75VDC
Motion-detected average current: 3mA
Working Mode: Single or Dual Pulse Detection
Price: $15.95

Pressure/Force Sensor:
Sparkfun Force Sensitive Resistor:
Dimension: 3.5”x 1.75”
Sensing area: 1.75’’x1.75’’
Force sensing range: 100g-10kg
Price: $11.25

FS90R Continuous Rotation Servo
Operating Voltage: 4.8VDC/6.0VDC
Stall Torque: 1.3kg/cm(4.8V)/1.5kg/cm(6.0V)
Max speed: 110RPM(4.8V)/ 130RPM(6V)
Price: $14.99 (two units)




We would like to express our special thanks of gratitude to the course CSE-123 gave us an opportunity to present this poster as well as David Harrison and David Kooi who provide many suggestions to help us to make this project happen. We are thankful to them.