2015-03-16 (M) 3D Printed Automatic Tea Maker

The circuit was soldered according to the I/O list from the program. The list was transcribed to an Evernote file and displayed on an iPad for easy viewing during the soldering process. The largest component was the LCD screen so soldering started with it. Scrap phone wire was harvested. Red and black wires were primarily used for power wires while green and yellow were used for signal wires. Colors were simply alternated to avoid overuse of a single color as opposed to assigning colors to a particular signal type. (An alternative could have been to use green for inputs and yellow for outputs as seen by the microprocessor.)

Backside of soldered LCD

The LCD was the most time consuming component to solder. After it a three terminal header pin was soldered to the Arduino to supply power, ground, and signal to a servo. Several methods were investigated for the terminal but the header pins will likely be glued in place once the enclosure is printed. A small switch was selected from stocked components. Other switches were available which looked nicer but the chosen switch is very common and has the advantage of being installed from behind the enclosure so it can be soldered immediately, troubleshot, and installed later without having to desolder it. A piezo speaker was taken from stocked components and installed to the Arduino on the buzzer pin. This speaker has not been used before so its output is unknown. Pin 13 was intentionally left unpopulated since this is the onboard LED which can be used for device feedback.

Soldered project

To do:
  • Solder circuit
    • LCD
    • Servo terminal
    • Switch (must be inserted from rear)
    • Piezo speaker
  • Reprint 3D models
  • Download and test code
  • Debug code
  • Make code public
  • Design enclosure for screen, potentiometer, power, and buttons
  • Print enclosure
  • Draw schematic
  • Make notes for special Arduino functions
  • Build breadboard circuit
  • Compile and test

The rest of the posts for this project have been arranged by date.

A list showing of all the final posts of COMPLETED projects.


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2015-03-08 (Su)

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