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• the dome decoder

  davedarko • 05/16/2022 at 08:27 • 0 comments

  Had to share this beauty

• more lights

  davedarko • 05/16/2022 at 07:57 • 0 comments

  R2-D2 has some fancy lights in his head, but here with the 40% scale they resulted to holographic stickers instead. I might change that with some fibre optics (lichtleiter for ebay) or replace it with an OLED - not sure yet! both displays come together to 225 LEDs.

  LED system: 

  http://2geekswebdesign.com/astromech/lighting-up-the-dome-part-1-building-the-teeces-3-2-logic-display-and-psi-system/
  

• Power section and motor control

  davedarko • 05/15/2022 at 18:45 • 0 comments

  R2-D2 seems to run on 3 voltages:

  • 6V for the motors
  • 4.5V for the logic
  • 1.5V for clock or memory keeping

  From other projects I've learned about drone parts, known as BECs that convert LiPo voltages to 5V and most often 12V. I want to modify the HTPDB-XT60 module so it will convert to 5V and 6V instead, so I can use a 2-cell LiPo pack.

  To control the motors I will use a DRV8838 single motor driver for the dome and a DRV8833 dual driver for the leg wheels
  

• what's inside

  davedarko • 05/14/2022 at 23:30 • 0 comments

  This thing is packed with interesting stuff!

  Dome

  • PIR sensor
  • 2 microphones, 1 left and 1 right (for body reaction only?)
  • LED for the beamer
  • two LEDs in the front
  • ultra-sonic range finder
  • PIEZO in the top (tap to wake up)

  Body

  • Speaker
  • another microphone
  • dome motor
  • 3 IR photo sensors for dome position check
  • leg motors
  • switch acting as "brake" / bolt

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