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My First Bot — Parallax Forums

My First Bot

Oldbitcollector (Jeff)Oldbitcollector (Jeff) Posts: 8,091
edited 2008-09-01 00:37 in Robotics
This is truly a first for me...

While I'm waiting for some more stuff for my mini HERO project,
I thought I'd dive in a get my feet wet.

This is the result after night 1..

The base is a piece of ABS plastic I cut from the top of an old Gateway case.

OBC

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New to the Propeller?

Getting started with the Protoboard? - Propeller Cookbook 1.4
Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
Got an SD card? - PropDOS
Need a part? Got spare electronics? - The Electronics Exchange
mybot.JPG
600 x 450 - 111K

Comments

  • ercoerco Posts: 20,256
    edited 2008-06-01 17:14
    Nice job, OBC! Love·your hands-on approach, using a piece of computer case for a chassis. Wait until you get your hands on some real styrene sheet,·which scores & snaps beautifully...

    BTW, if you're in a hurry to get your bot's rear end off the ground, consider a drawer pull at least temporarily, as the CBA robot uses. Quick & dirty, looks good, probably just as good as a real caster if you don't put too much weight on it.

    http://www.budgetbot.com/CBA_Kit.html

    CBA_bottom_front.jpgCBA_top11.jpg

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    ·"If you build it, they will come."
  • Oldbitcollector (Jeff)Oldbitcollector (Jeff) Posts: 8,091
    edited 2008-06-01 22:49
    Update,

    Got the third swivel wheel on, and started to run into challenges...

    First challenge.. Learn that servos require different pulse rates to go different directions.
    (That had me going for a few minutes..)

    Second, had problems with the servo section of the Propeller board.. Recreated
    another servo connection point by running 5V straight to it, instead of going through
    the cap near the original servo connections. Not sure if I shorted that section out
    when I assembled it (The tolerances are pretty tight), but either way, I got it functioning.

    Next challenge.. Why does my prop reboot when I attempt to run both servos at once?
    Perhaps I'm drawing too much power?

    Here's a shot of today's progress..

    OBC

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    New to the Propeller?

    Getting started with the Protoboard? - Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card? - PropDOS
    Need a part? Got spare electronics? - The Electronics Exchange
    mybot2.JPG
    800 x 600 - 137K
  • Oldbitcollector (Jeff)Oldbitcollector (Jeff) Posts: 8,091
    edited 2008-06-01 23:39
    I win.. Tapped servo power from the wrong spot when I moved the servo connections.

    Homemade Boe Bot now moves forward correctly!

    OBC

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    New to the Propeller?

    Getting started with the Protoboard? - Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card? - PropDOS
    Need a part? Got spare electronics? - The Electronics Exchange
  • Oldbitcollector (Jeff)Oldbitcollector (Jeff) Posts: 8,091
    edited 2008-06-02 01:29
    Added a face.. Too bad it looks like this PING sensor is shot. (I suspected it)
    Working perfectly now thanks to a little debugging... (and help from Mike Green)

    Not bad for a robot made out of two Parallax servos, a Protoboard, and uController SD adapter..
    Most everything else was recycled materials. (Except the $2.00 caster wheel.)

    Edit:
    I swear I've never built anything mechanical that actually worked! Thanks Parallax!

    Next problem: I can't bring myself to tear it apart for parts for my HERO1 project.
    (I swear I actually saw a tear fall out of a servo when I moved toward it with a screwdriver. [noparse]:)[/noparse]
    Time to order some more servos!

    OBC

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    New to the Propeller?

    Getting started with the Protoboard? - Propeller Cookbook 1.4
    Updates to the Cookbook are now posted to: Propeller.warrantyvoid.us
    Got an SD card? - PropDOS
    Need a part? Got spare electronics? - The Electronics Exchange

    Post Edited (Oldbitcollector) : 6/2/2008 3:47:29 PM GMT
    mybot3.JPG
    800 x 600 - 139K
  • MovieMakerMovieMaker Posts: 502
    edited 2008-08-30 21:21
    I really like your Picture of the little boy with the fork. I forgot to tell you. Also, I built a Hero1 about 15-20 years ago. It was a lot of fun. But, surely, you want to go with a more modern brain now. I was moving to another home and there was just not room for the hero1. So he stayed in the old house. I imagine the people who moved in really liked him.
  • MovieMakerMovieMaker Posts: 502
    edited 2008-08-30 21:21
    OH, BTW, I forgot to tell you how I like your creative way to make the boebot.
  • WhitWhit Posts: 4,191
    edited 2008-08-30 21:30
    Looks great OBC. I think I am going to mount my protoboard on my BoeBot and give it a shot.

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    Whit+


    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • MovieMakerMovieMaker Posts: 502
    edited 2008-09-01 00:37
    By working perfect, do you mean the software is all in already? or just all of the hardware tests fine.
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