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Thread: Top 10 Mistakes by beginners

  1. #21
    Junior Member Newbie
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    What ever be the reasons docel's post takes the cake

    what a language ! i admire it! the way he put forward some seemingly complex things in a simple manner

    Srry but had to read it twice to get to the inherent joke.

  2. #22
    Member Advanced User
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    Default 9v batteries

    why is using 9v batteries for running motors in the list of top 10 mistakes by beginners ?..
    can anyone explain..






    www.makerobots.weebly.com
    Last edited by kawal24; 02-01-2011 at 10:44 PM.

  3. #23
    Senior Member Cyborg
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    The 9V battery mentioned in first post is the "rectangle 9V" battery, which doesnt have enough current capacity. its also called PP3 battery.
    The cannot supply the levels of current required by a geared motor we genrally use/find.
    Newbies simply see the voltage rating of a motor - 6V to 12V, and say ah! ill use this 9V battery. (and that too the cheap chinese ones which are only good for an LED if that at all.0
    Vivek
    --
    " To get working ideas effectively, I try to fail as fast as I can. "
    Richard Feynman
    --
    http://www.youtube.com/watch?v=JqlawTD_9B0

  4. #24
    Senior Member Cyborg
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    one could add details to not reading datasheet or not following the schematic on web in detail because they think they "know the basics well"

    - not using bypass caps on MCU power supply, because it seems dumb that you will have so many 0.1uF caps in parallel on the 5V rail
    - using a "close enough" value on crystal of the MCU, (which is sometimes too far, even if they know how to read the capacitor value) and results in no start or intermittent start of MCU
    - using a wall adapter to power the circuit and motors (usually the variable voltage wall adapter rated at 100mA) , if not the 9V pp3 battery
    - twisting wires, un-taped as a kam-chalau solution and never getting back to making the joint reliable and insulated. ( we have all done this and then learned the hard-way.)
    Last edited by Vivek; 02-01-2011 at 10:21 PM.
    Vivek
    --
    " To get working ideas effectively, I try to fail as fast as I can. "
    Richard Feynman
    --
    http://www.youtube.com/watch?v=JqlawTD_9B0

  5. #25
    Junior Member User mcufreak's Avatar
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    ** Planing ...planing and planing(Analysis paralysis) before even programing first MCU.
    ** Wasting huge time for searching 'lowest cost vendors'
    ** Trying to cover many lapses at once without a hands-on experience on every lapse.
    ** Not going thoroughly on RI(or any other forum) and then posting stupid general questions.

    These are the things done by me when i started.

  6. #26

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    A big common mistake

    Not tieing diff parts(modules) of circuit to common ground rail.
    would result in errant strange behavior

  7. #27
    Administrator T-1000 rao's Avatar
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    lolman and ralf, let's keep the posts relevant and not opinionated in any manner.

    Rao

  8. #28
    Junior Member Newbie
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    1. Powering on the dremel or other speed control drills without ensuring they are set to zero speed.
    2. Drilling things without ensuring that they are held in stable position
    3. Keeping plastic objects near/behind the stand containing a hot soldering iron.
    4. Using high voltages on a solderless breadboard.

  9. #29
    Senior Member Cyborg sudarshan's Avatar
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    -making lose wire connections and the bot stops without and break thier heads to find out the mistake.
    -trying the most complex codes.
    -most believe that robot refers only to a humanoid and assume its impossible for them to make one.
    BY
    Sudarshan Anbazhagan,
    SuperBotics MultiTech Pvt. Ltd.

    http://www.superbotics.com
    http://www.getahost.in

  10. #30
    Junior Member Newbie
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    Nice to see the post... truth unvieled

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