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Analog-Clock

The Analog Clock: Each group must build an analog clock that tells the time (creativity is a must). The clock can be built from anything (cardboard, laser cut pieces, 3D printed, etc.) however, you must use at least one servo.

Demo

ME134_Homework2_BarrelClock.mp4

Watch on Youtube

Design

Mechanical Design

Our CAD design is three “Barrels” one for hours, one for minutes and another for seconds.

We also had to design parts to holds the servo in the middle of the barrel with screwable clips.

Electronics Design

Servo Motors

  • Servo HAT Allows for:
    • External libraries which simplifies communication with multiple servo motors without leaning on PWM
      • Simplifies control to i2c where we only need
    • Flexible Power Supply (Battery or Wall)
  • Use of Smaller Servo Motors allows for more compact design

Getting the Time

  • time.time()
    • Returns the number of seconds since EPOCH (1/1/1970)
  • time.localtime(t)
    • Takes an input in seconds
    • Returns the Date and Time of that input as a struct containing hours, minutes, seconds, current month, year, and more
  • Data converted to 12 hour clock format
  • Time Multiplier:
    • Subtract current time and initial time, multiply by facto

Software Design

Robot Control (Clock Class)

  • Stores previous servo positions (prevent twitch)
  • Holds Lookup Tables
  • Sets servo positions based on processed system time

Open Source

Adafruit-circuitpython-servokit

  • Setups register-level configuration of servos
  • i2c comms
  • PWM communication for position control
  • Easy API to access / control servos

Run Locally

Clone the project

  git clone https://github.com/paccionesawyer/Analog-Clock.git

Go to the project directory

  cd Analog-Clock

Run the program

  python3 2Axis-LidarScanner.py

Acknowledgements

License

MIT

Authors