Shelving Unit:

  • Base unit is a pre-manufactured two tier stainless steel manual pull down shelf made by Rev-A-Shelf
  • Dimensions: 21.75″ W x 18.87″ H x 10.25″ D
  • Weight: 23lbs.
  • Additional weight limit: 40lbs.
  • Requires a cabinet with a minimum 20-1/4″ wide opening
  • Pulls out 14-3/4″ and lowers 10″ from fully stowed position
  • Shelf can be bottom or side mounted in cabinet
  • Gas assist pistons stabilize movement of shelf
  • Modified with a 6″ stroke linear actuator recycled from a power wheel chair to automate the lowering and raising of the shelf from the cabinet

Automation Unit:

  • 24VDC, 6″ stroke linear actuator
  • 4.6A max current
  • 100lb. weight capacity
  • Weight: 1.3lbs.

Control Unit:

  • Arduino Uno R3 prototyping platform utilizing the ATMega328 8-bit microcontroller
  • Operating voltage: 5VDC
  • Recommended input voltage: 7-12 VDC
  • Input voltage limits: 6-20 VDC 
  • 14 Digital I/O pins, 6 Analog input pins
  • 40mA max current per I/O pin
  • 3.3V, 5V, Vin pins for accessing input voltage

Wireless Control:

  • 4-button key fob style RF transmitter utilizing a PT2262 encoder
  • RF receiver utilizing a PT2272 decoder
  • Receiver has 4 toggle type data outputs, coinciding with the 4 button transmitter, for easy interface with the Arduino
  • Frequency: 315MHz

Collision Detection Control:

  • Array of 3 HC-SR04 ultrasonic sensors
  • Operating voltage: 5VDC
  • Quiescent current: 2mA
  • Working current: 15mA
  • Frequency: 40kHz
  • Ranging distance: 2cm-400cm/1in-13ft
  • Angle of detection: <15degs
  • Resolution: 0.3cm
  • Array begins detection every 250ms with 35ms between each sensor ping for approx. 3 full array pings per second

 Power Supply:

  • Input: 120VAC
  • Output: 12VDC, 3A

 Total Weight:

  • Approximately 25lbs.