fixing a bad motivator

putting a new brain into an interactive R2-D2 from 2002

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I've recently bought an interactive R2-D2 by hasbro from 2002. Sadly the main board has stopped working, there's no short on the board. So I need to find a way to give it a new brain and reuse parts to restore functionality as much as I can.

Here's a better demonstration video with the three dance modes. Would love to get the sound files somewhere.

  • the dome decoder

    davedarko05/16/2022 at 08:27 0 comments

    Had to share this beauty

  • more lights

    davedarko05/16/2022 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:

  • Power section and motor control

    davedarko05/15/2022 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

    davedarko05/14/2022 at 23:30 0 comments

    This thing is packed with interesting stuff!


    • 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)


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

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