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Building a Mira inspired robot: Electronics arrived [Part 4.1]

Posted on July 11, 2017July 21, 2017 by Ianmcmill

The first batch of electronics arrived. I picked them by best guessing the stuff seen in the video from ‘Tested’. I decided to go with the SG90 servos as they are dirt cheap compared to the digital metal gear servos. The only problem so far is that I don’t have any clue how to code the stuff the robot is supposed to do but time will tell. I sense it.

Part Amount Price (total)
Teensy 3.2 1 22,50 €
NeoPixel (Pack of 5) 5 5,35 €
Micro OLED breakout 2 32,40 €
Speaker – 8Ohm, 0.5 Watt 1 1,50€
Amplifier (lingered in the pit for some time) 5 ~3,00€
Total 64,75€

The Rpi 2b+ I have laying around, aswell as the servos. A li-ion battery is floating somewhere as far as I can remember. Oh and I still need a Raspberry Pi Spy Camera. The advantage over the the standard go-to camera is the much smaller pcb and a smaller ribbon cable. This will add another ~30€ to the bot. Also, if I decide to go for the PowerHD servos, they would add 45€ to the pot. This is escalating quickly. Again.

Do it! :

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11 thoughts on “Building a Mira inspired robot: Electronics arrived [Part 4.1]”

  1. Scott Willson says:
    September 14, 2017 at 1:12 am

    Would you be willing to share the design or STL files? I have an extensive background in electronics and programming and would love to build one of these.

    Reply
    1. Ianmcmill says:
      September 14, 2017 at 11:59 am

      Yep sure. I’d love to. I just need to find the correct version and maybe we can work on this together. I’ll post the files here on my blog later.

      Reply
      1. Scott Willson says:
        September 14, 2017 at 1:49 pm

        That’d be awesome, would love to collaborate on this!

        Reply
      2. Scott Willson says:
        September 19, 2017 at 2:04 am

        Got my servos and should have the remaining electronics in a couple of days, any luck finding the design files?

        Reply
        1. Ianmcmill says:
          September 20, 2017 at 12:43 pm

          I have found 2 iterations. Already starting to forget where I stopped. I now wonder how I should share the files. It was made in Fusion360 so I can export to IGES and STEP or respectably the Fusion format. Or I could share the project files iva Fusion360 Gallery / public link. Do you use Fusion360 or Inventor?

          Reply
          1. SCOTT E WILLSON says:
            September 20, 2017 at 11:53 pm

            Awesome! I should be able to use Fusion360 format.

  2. Mark says:
    February 5, 2018 at 8:20 am

    Hi,

    Just checking how much further you got with this design?

    Reply
    1. Ianmcmill says:
      February 12, 2018 at 11:12 am

      Sorry for the late reply.

      It is currently on hold as I recon that the original servos would be better then the cheap 9g servos I build this thing around. Thing is these metal gear digital servos cost around 20$ each and I am not willing to spend that much money (60$) on these as I don’t know how to code the brains of the robot afterwards.
      I have found cheap 5$ stepper motors which are very thin (36.3*12.4mm Ultra thin 0.9° Stepper motor DC6V 0.3A 0.04N.m). This could be an alternative but I am unsure as this would require additional stepper drivers which bloats the internal hardware too much IMHO.

      If I could find cheaper metal gear digital servos with the same size and specs as in the original design I would be happy.

      P.S. the guy how made this robot initially is not a big help. He created a site for you to sign up for his newsletter but it seems to be a dead end. Maybe he just wanted to collect some mail addresses 🙂 not for profit ofc 😀 😀

      Reply
  3. Valerio says:
    February 12, 2018 at 10:55 am

    HI Sebastian,
    I really appreciate what you have done!
    I would like to collaborate as well on this project!!Could you share with me the design files?
    Have you already done a prototype?

    Reply
    1. Ianmcmill says:
      February 12, 2018 at 11:15 am

      Hey! I haven’t printed a prototype or done anything to the design lately. See my above comment for the reasons. I might consider to make a new post with design files I have so far. Collaboration would be nice. Some coder would be appreciated.

      Reply
  4. Antoine Thibault says:
    June 17, 2021 at 4:27 pm

    Hey, This project is amazing! I am working on my own version of it too. It will be greate to collaborate and share some infos! Here is my email : at_06@ aol.com

    Reply

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