Tentative Device Parts to be Used for Design

• Arduino Nano Microcontroller ATmega328
  • Specifications:
    Operating Voltage: 5 V
    Flash Memory: 32 KB of which 2 KB used by bootloader
    SRAM: 2 KB
    Clock Speed: 16 MHz
    Analog IN Pins: 8
    EEPROM: 1 KB
    DC Current per I/O Pins: 20 mA (I/O Pins)
    Input Voltage: 7-12V
    Digital I/O Pins: 22 (6 of which are PWM)
    PWM Output: 6
    Power Consumption: 19 mA
    PCB Size: 18 x 45 mm
    Weight: 7 g
• Maxon EC22 DC Brushless motor
  • Specifications:
  • Weight: 128 grams
  • Torque:
    • 0.0476 Nm nominal torque
    • 0.857 Nm stall torque
  • Force:
    • 16 N max radial force
    • 4 N max axial force
  • Power:
    • 48V Nominal Voltage
    • 3.45mA Nominal Current
    • 30,000 Nominal RPM
  • Size:
    • Cylindrical
    • 22mm diameter
    • Cost: $322/unit
• Dyneema Polymer Cord Tensioner
  • Specifications:
    Durability: Extremely strong
    Breaking Strength: 2500-3000 lbs
    Elastic Modulus: 120 GPa
    Ease of Adjustment: Smooth
    Size Profile: 0.009 lbs/ft (⅛”)
    Cost: ~$0.47/foot
• Bourns 3590 Precision Potentiometer
  • Resistance Range: 200-100k Ohms
  • Resistance Taper: Linear
  • Resistance Tolerance: 5%
  • Size: 20.4mm length, 6.4mm diameter
  • Cost: $16.47 for 10 units
• Phase I Material Selection
• Phase II Material Selection
• Phase III Material Selection
• Battery Pack
  • 48 V, 3300 mAh
• Straps/Buckles/Velcro
• Pins/Screws
• Padding

Frameworks:

• Rotational Potentiometer Set Point and Range of Motion System
• Accessory Based Modular System
• Tensioner Based Actuation
• Mechanical Hard-Stop Fail-Safe System
• Manual Emergency Shutoff System