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HoverHaul

Hoverbot-based, rugged flatbed robotic experimentation platform

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Start with https://hackaday.io/project/158256, add an old hospital bed, some wood, and a few other bits laying around and hopefully end up with a rugged outdoor robotic experimentation platform

What do you do with a hoverboard with a bad battery pack? Order a new battery pack and have fun!

But what if the replacement is bad , they don't want it back, and they give you a refund? Well, things got interesting.

Isabelle Simova got me started on the path with her Hoverbot.  The only real difference between this build and Isabelle's is the shape and materials the body/frame is made of.  HoverHaul's body is mostly made from metal bed frame 'L' pieces welded together with wood accents. I will be adding a rear camera with the rear proximity sensor.

In progress for several months now, just a few things are really needed to complete the project. 

  1. Finish battery pack - In the intro, I mentioned the hoverboard had a bad battery pack, and the replacement probably had a bad BCM. I had spare cells, so I could at least make up any difference. I tore both apart, identified the 1 bad cell in the old pack, charged and checked all of the cells, as well as a few replacements just in case, and ordered a new BCM, holders, and nickel strips. I had over 50 good cells to work with! I've never built a 10s5p (2.5x standard battery size) or any other battery pack with BMS. Deciding not to build my own spot welder, I'm waiting on the shipment to arrive. This needs to be done before I can calibrate the motors.
  2. Motor controller board programming - Not sure if it is locked or not, can't find unlock utility, reset pin is a PITA to solder and keeps falling off, generally won't program (ST-Link V2 seems to be ok and talking to the board - well, it was, not it isn't. Ordered 2 more.). Step 1 really needs to be done first anyway, but without this done, I won't be able to drive it. Will consider a new board if I have to.
  3.  Video doesn't work. - cat_video seems to be working, I can talk to it on port 8080, but I get no stills or video.
  4. Proximity sensors not installed yet.

  • Tool Pipeline

    Jeffry Archambeault08/22/2021 at 02:47 0 comments

    HoverHaul has sought cover for the weekend, and meanwhile:

    • Pipeline is still moving well.  There are still things to work on while other things are being shipped here. I will need more nickle strips, but I don't mind splitting the battery pack work up  Tools have been showing up as they are needed.  There are tasks that will be put aside this weekend due to weather, which gives me the time to build the battery pack, because...
    • The spot welder came today. Wondering how I'm going to connect it to a suitable battery. My 16AH worth of solar-charged LiFePO4s isn't gonna cut it, so I'll be using a car battery. Not exactly something I can put on my workbench while I weld, so I'll have to use jumper cables of some sort. 
    • Next in tool pipeline are a replacement and spare ST-Link V2's to replace the one I toasted. 
    • I've been putting modules on boards, the Pi will be next. Still need wooden furring strips to screw into between the metal storage box and the mounting boards.
    • Verified alsa sees external speaker and camera's mic for recording
    • While I was checking another USB camera with audio, I noticed STT Output doesn't work, afaict. Still looking at port 8080 (camera server output), cuz whatever it is, hoverbot code doesn't like it .

  • HoverHaul Bot Log

    Jeffry Archambeault08/19/2021 at 20:16 0 comments

    I pot some stuff in chat, but this is probably better. Currently:

    • The chassis is complete and ready for testing.
    • Components are being mounted to wood for mounting inside the utility compartment.
    • Structural supports for components are being designed
    • Waiting on welder for battery pack
    • Waiting on new ST-Link

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