Tech-queries

Refer to this page for more useful technical info.

  • The cheapest way to get spare parts is to take apart old and unused electronics. (Eg. press-buttons from a broken calculator, motors and RF modules from old RC cars, etc.)
  • Proper indentation always helps when debugging code. Commenting at important sections also helps to identify glitches quickly.
  • Faulty hardware accounts for over 50% of the problems.
  • When soldering multiple wires and bunching them together in a single cable, it’s always safer to use heat shrink tubing compared to electrical tape.
  • If a python code which uses GPIO pins is not running on a Raspberry Pi, it’s probably because another process which started earlier is using the same pins. Try running ‘sudo killall python’ and then execute the new code.
  • ATV’s should have thick tyres because thin wheels tend to cut through sand easily.
  • The chassis of a racer should be lightweight and strong.
  • Hot glue sticks almost anything. It secures electrical and mechanical connections well, and can also be removed easily without much scraping.
  • Autonomous robots tend to skid if their motor’s rpm is high (greater than 250). A good way to prevent this is to incorporate a reverse command with a small delay of 100 to 1000 milliseconds, depending on weight and speed of the robot.

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